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CX Customization and Modifications

Started by kingston73 at 06-07-2009 5:39 PM. Topic has 53 replies.

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   06-07-2009, 5:39 PM
kingston73 is not online. Last active: 7/23/2010 1:40:34 AM kingston73



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Progressive Fork Springs - Where and how much recently?
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So I'm thinking I might get some new fork springs, even with a 1 inch spacer in mine are diving fairly good on heavy stops.  I couldn't find any recent posts about anyone buying and installing progressive springs.  Any help?

1979 cx500D - mostly stock

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   06-07-2009, 7:46 PM
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Re: Progressive Fork Springs - Where and how much recently?
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The problem with progressive fork springs is the fact that several people have gotten them just to find out they are two wide inside. I think the only easy way to know is to contact a distributor and give them the measurement of the fork spring diameter just to double check and then once you get some that work pass on the info so I can get some. You wouldn't believe what I have in mine but I'll tell you anyway. I have a 1 1/2 inch spacer and six washers in each fork. 3 above and 3 below the preload. It was a paint to get all the guts in there and not get killed. These will never come apart or if they do I'm going to have to find a good way so I don't get killed.

Larry had trouble finding his and another guy had problems but I don't remember if that issue was resolved. I can say I do like what I have now but I don't recommend it for anyone.

1979 CX500 Supertanker
ATGATT makes riding a bike like a sled easier.

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   06-07-2009, 10:39 PM
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Re: Progressive Fork Springs - Where and how much recently?
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I just emailed Progressive Suspension to see if they could give me a spring diameter but if you want to get some now I recommend going and buying directly from them. Price is $92.95

http://www.progressivesuspension.com/productsearch.aspx

1979 CX500 Supertanker
ATGATT makes riding a bike like a sled easier.

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   06-08-2009, 5:14 AM
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Re: Progressive Fork Springs - Where and how much recently?
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Thanks Stitch, I was searching google for a while and it never once occured to me to go right to the progressive website directly. I found the listing on their site and they say its the 11-1109 spring kit. I then put into google "11-1109 progressive fork springs" and have found several listings. The best price I've found so far is from PhatPerformanceParts.com for $79 total with regular shipping. It's only saving a few dollars over direct from Progressive, but right now for me every penny counts. Still not sure if I'm going to order them right now or wait, but if/when I get them and install them I'll update.
1979 cx500D - mostly stock

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   06-08-2009, 9:23 AM
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Re: Progressive Fork Springs - Where and how much recently?
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I got an email back and it said.

The part # 11-1109 is correct for your year make and model and the OD of the part is .86 or 22mm.

Does anybody know the measurement across of the fork springs? I don't have a set out of the bike right now to check against.
Either way if it's the same measurement we could get the springs from anyone knowing the part number.


1979 CX500 Supertanker
ATGATT makes riding a bike like a sled easier.

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   06-08-2009, 9:37 AM
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Re: Progressive Fork Springs - Where and how much recently?
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" You wouldn't believe what I have in mine but I'll tell you anyway. I have a 1 1/2 inch spacer and six washers in each fork. 3 above and 3 below the preload."


Wow, that's a lot. Mine was a PITA with just a 1 inch spacer, I'm impressed you got all that in there. Like I said, even with 20w oil and a 1 inch spacer my fork still bounces and almost bottoms out when I hit the brakes hard, so the more I think about it the more I'm convincing myself I'm going to go ahead and get some of these Progressives.
1979 cx500D - mostly stock

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   06-08-2009, 3:35 PM
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Re: Progressive Fork Springs - Where and how much recently?
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I have been trying to convince myself to get a set for a while now. This combination is working but I want progressive. just need someone else to take the dive an verify which set works.

1979 CX500 Supertanker
ATGATT makes riding a bike like a sled easier.

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   06-11-2009, 4:43 AM
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Re: Progressive Fork Springs - Where and how much recently?
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Well, I decided after re-reading Larry's post about his progressive's on Shep's site to go ahead and suck it up and buy some.  $80 total from PhatPerformanceParts.com, I bought the 11-1109 Progressives.  Don't know how long it'll take to get them, hopefully sooner rather than later.  I'll post back once I get them together and take a ride, hope they fit.

1979 cx500D - mostly stock

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   06-11-2009, 7:46 AM
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Re: Progressive Fork Springs - Where and how much recently?
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Ok well I put it in the quick reference so you have to come back and review them or at least confirm that those numbers fit the older forks.

1979 CX500 Supertanker
ATGATT makes riding a bike like a sled easier.

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   06-18-2009, 4:29 PM
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Re: Progressive Fork Springs - Where and how much recently?
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Got my springs today, but 2 problems.  One I can't fix, it's pouring rain so I can't install them today, and I'm going away for a few days so I probably won't be able to work on the bike till at least monday.  But the second problem - the springs might be the right diameter, they seem about the same size but won't know for sure until I try installing them.  The problem is the spacers, or lack of spacers.  Unless I'm supposed to install these in place of the long springs and still keep the short springs in the top, these are way too short with the included spacers.  I'm going to PM Larry to see what he did, but what do y'all think, keep the short springs, or go to Lowes and make some long spacers to put in?

1979 cx500D - mostly stock

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   06-18-2009, 6:27 PM
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Re: Progressive Fork Springs - Where and how much recently?
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Rather than jump the gun, I'd say wait and compare their unloaded length to the stock lower springs. If they are the same, seems like a safe bet they are only supposed to replace the lowers. 

Anxiously awaiting your review :) Good luck!



'78 CX500 - Back from the brink!
'81 CX500C- Finally Running thanks to Ignitech!
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   06-18-2009, 7:49 PM
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Re: Progressive Fork Springs - Where and how much recently?
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I could have swore that two kits are required but I cant verify. A short 4 inch spring and then a longer one.

1979 CX500 Supertanker
ATGATT makes riding a bike like a sled easier.

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   06-18-2009, 8:01 PM
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Re: Progressive Fork Springs - Where and how much recently?
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I sent Progressive an email asking them what's up with this, but until I have a chance to take the old springs out I can't really do much else.  Larry remembers just dropping them in without using the short springs.  I'll have to measure the old and new and see what I have.  If it ends up that the new are too short, I wonder what would be more effective, using the OEM short sections or putting a long spacer in like some Suzuki's use?  The GS had/has about a foot long spacer in it.
1979 cx500D - mostly stock

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   06-24-2009, 6:15 AM
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Re: Progressive Fork Springs - Where and how much recently?
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The Progressive 11-1111 spring for the 82 GL500 is about 1 inch longer, and a lot stiffer then the original lower spring. New upper springs, and rebound springs from Honda were compared to the ultrasonically cleaned originals (upper & rebound) with no difference found.

The only problem I had rebuilding the forks was getting the parts from the Old Bike Barn. It took three emails, five phone calls, and a threat to get the credit card company involved before the Old Bike Barn sent the Progressive springs. At one point I contacted Progressive and was told the Old Bike Barn was not one of their resellers. Beware.



1982 GL500 Interstate Project Bike.
2005 Suzuki S50 (VS-800) Daily Rider.
Looking at ST1300s


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   06-24-2009, 6:23 AM
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Re: Progressive Fork Springs - Where and how much recently?
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Update: the 11-1109 spring kit is apparently completely correct. I don't really understand how, but they fit perfectly and the spacer included in the kit gives the springs a 1 inch preload. When you lay them out side by side, the Progressives/spacer is about an inch shorter than the long/short OEM spring combo. I haven't had a chance to ride it yet, as it started raining AGAIN (I've seen pairs of animals traveling on a boat) but just sitting on it there's a bit less static sag. I'm glad I did this because I was riding around on a slightly loose axle, it was only snug, not really tight. I'll let you know how the ride is, but for about $80 I think this is probably one of the better upgrades somebody can make. Only took about an hour total.
1979 cx500D - mostly stock

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   06-24-2009, 5:29 PM
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Re: Progressive Fork Springs - Where and how much recently?
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Good to hear it works. Will be waiting for the final word. I like a really stiff front end so I'm curious how good the progressives would be. I think I actually maxed out the maximum preload ability in my current forks so I'm waiting on your word. Then maybe I'll upgrade too. Beats the slinky springs I started with.

1979 CX500 Supertanker
ATGATT makes riding a bike like a sled easier.

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   06-24-2009, 5:35 PM
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Re: Progressive Fork Springs - Where and how much recently?
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The really great thing about these is if I want to make them stiffer I can just install a longer spacer.  They were easier to get back together than the long/short/spacer combo I had in before.

1979 cx500D - mostly stock

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   06-25-2009, 4:32 PM
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Re: Progressive Fork Springs - Where and how much recently?
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Finally got to ride today with the new springs. Much better, hard to describe but compared to the oem springs with a spacer these springs are softer yet firmer. They give me more road feel, like they are more active compared with the old setup, but they don't dive nearly as much, and also have less sag when sitting still. Definitely worth the money, especially when you factor in how easy they were to install. The only drawback is these Progressives have really shown me how poor my rear suspension is. Not sure what I'm going to do about that, I'm considering putting my OEM springs on these new shocks and seeing what that does to the ride.
1979 cx500D - mostly stock

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   07-01-2009, 12:01 AM
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Re: Progressive Fork Springs - Where and how much recently?
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Well I bit the bullet. $78 from Phat Performance and they are on their way. I guess I can review what I think of them when they come. I prefer firm stiff forks with less dive. I know the dive is important but a little stiffness doesn't hurt anything.  Now if only I coudl get a stock set of new plug and play gauges.

1979 CX500 Supertanker
ATGATT makes riding a bike like a sled easier.

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   07-01-2009, 9:49 AM
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Re: Progressive Fork Springs - Where and how much recently?
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Hope you like them.  Like I said, if they don't feel stiff enough you can put your own longer spacer in.  The hardest part for me was just trying to get the oil levels right in each fork.  I had to add some to each fork leg, the instructions recommend no more than about 5 1/2 inches from the top, so I made each about 6 inches from the top just to make sure I didn't over-fill each leg.  I'm pretty sure you'll find it much easier to install than what you have in there now, only a spring, washer, and spacer in each.
1979 cx500D - mostly stock

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   07-01-2009, 9:58 AM
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Re: Progressive Fork Springs - Where and how much recently?
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The trouble most likely is going to come removing what I have in there. I'm going to have to take the tank off and have a clear view in front of me so I can see where the cap flys to. Probably going to be one of those don't try this at home moments.



1979 CX500 Supertanker
ATGATT makes riding a bike like a sled easier.

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   07-01-2009, 10:59 AM
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Re: Progressive Fork Springs - Where and how much recently?
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'Stitch - Get a couple heavy moving blankets.  With the tank off, cover the bike with one.  Fold the other in half and drape it over the top of the forks.  Reach under the blanket with your wrench and remove the caps (and hope you don't break your hands when they let go.)

R


'78 CX500 - Black Maggot --> Green Grub / Yellow Grub / Red Grub ???
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   07-01-2009, 8:30 PM
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Re: Progressive Fork Springs - Where and how much recently?
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Kingston, static sag is measured with the bike vertical, bike on it's wheels NO rider weight. I think sag should be 1 inch? Oil level should be measured with springs out forks vertical and compressed. Blindstitch, I removed the fork cap(s) with a socket wrench and a largeish towel on top of the ratchet with my hand pressing down on the towel no problem really. I loosen the caps in the triple clamps then put the fork tube in a padded jaw vice, then the towel thing.
Cheers, 50gary
Update: I always admit a mistake, Static sag is indeed with rider onboard. I mixed my terms, static sag is with rider on board and Free Sag (which is what I was thinking of) is bike weight only. The following is from Race Tech engeering (Motorcycle Suspensions)
Static Sag is the amount the bike settles, from fully extended, with the rider on board in riding position. First, extend the forks completely (bike off the ground). Measure from the wiper to the bottom of the triple clamp on conventional forks or from the wiper to a point on the axle clamp on inverted forks. This is L1.
Take the bike off the stand and put the rider on board in riding position (Street - sitting or Road race - full tuck). Get an assistant to balance the bike or have the rider hold onto something. Push down on the front end and let it extend very slowly. Where it stops, measure the distance between the wiper and the bottom of the triple clamp again. Do not bounce. This is L2. (If there were no drag, the bike would come up a little further.)
Next, lift up on the front end and let it drop very slowly. Where it stops, measure again. Do not bounce. This is L3. The reason L2 and L3 are different is due to stiction or drag in the seals and bushings. (If there were no drag, the bike would drop a little further.)
Half way between L2 and L3 is where the Sag would be with no drag or stiction. L2 and L3 must be averaged to find the midpoint and subtracted from L1 to calculate true Static Sag.

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   07-08-2009, 7:28 AM
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Re: Progressive Fork Springs - Where and how much recently?
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Anyone running these in a Turbo?

1983 CX650 Turbo
1982 CX500 Custom
Donating Member

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   07-08-2009, 7:57 AM
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Re: Progressive Fork Springs - Where and how much recently?
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Should be in the UPS truck on their way to my place today. I hope someone is at home to catch them. For some reason UPS doesn't leave crap on my doorstep here. Where at the last apartment they left a $1800 camera lens sitting on the step even though it said it needed a signature.

1979 CX500 Supertanker
ATGATT makes riding a bike like a sled easier.

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   07-08-2009, 6:05 PM
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Re: Progressive Fork Springs - Where and how much recently?
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I'm not a big fan of UPS, but hope they get to you on time and in good condition.  Let me know how you like them.

1979 cx500D - mostly stock

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   07-08-2009, 7:46 PM
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It's a good thing I work at UPS. Yeah I don't trust them either. USPS seems like the best. Damn driver wouldn't leave them at the office or on the door step. And I will probably miss him thrusday so If I don't get them friday I'll be set to kill. I know they are sitting at work right now going no where.

1979 CX500 Supertanker
ATGATT makes riding a bike like a sled easier.

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   07-09-2009, 5:03 AM
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Re: Progressive Fork Springs - Where and how much recently?
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Questions, what is the spring rate of the OEM CX springs? Second question what is the spring rate of the Progressive springs? Fork springs are usually listed as .8, .9, or 1.0 etc. Adding spacers and such doesn't change the spring rate. Are the new springs actually a rising rate or linier? I would measure the diameter of the wire before installation just out of curiosity if nothing else.
Cheers, 50gary

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   07-09-2009, 6:28 AM
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Re: Progressive Fork Springs - Where and how much recently?
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According to an old, original article I have, the OEM rate was 17-29 lbs/inch.  The Progressive springs are 35-45 lbs/in (.63-.80 kg/mm).  I forgot to measure the diameter before I installed them.  The new Progressives are tightly wound for a bit, maybe about 4 inches, and then they open up.  The OEM uses the 2 spring system, I'm not sure which spring was the "soft" one.

1979 cx500D - mostly stock

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   07-09-2009, 4:42 PM
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Re: Progressive Fork Springs - Where and how much recently?
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I would say the long OEM spring would be the soft one. It's a coil but still just a lever wound in a helix. At 450# plus rider and gear .8 kg is not overly firm IMO. Should work fine. I just measured the overall fork length, they are quite short 27.75 inches. I'm looking for a different set of forks that could be made to work, would be an upgrade to cartridge type and of course dual disc. I will not change the comstar wheels though I really think they are a integeral part of the bike's character.
Cheers, 50gary
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   07-09-2009, 5:14 PM
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Re: Progressive Fork Springs - Where and how much recently?
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Kingston I got my springs today and they won't fit in. Did you have any problems. I took lots of pictures to explain the problems. Damn things would only slide in 6 inches and that's it.

1979 CX500 Supertanker
ATGATT makes riding a bike like a sled easier.

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   07-09-2009, 6:08 PM
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Re: Progressive Fork Springs - Where and how much recently?
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Mine went in pretty easily. I put them in tight-wound end first, and I did have to "jiggle" them a little bit, but they went down the whole way. They came to about even with the lowest threads of the fork cap, and the spacer with mine was an inch long and sitting on top of the spring it stuck out of the fork top a little. I went and double checked, and it says 11-1109. What year is your bike? Is it possible we have different size forks on our bikes?
1979 cx500D - mostly stock

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   07-09-2009, 6:16 PM
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Re: Progressive Fork Springs - Where and how much recently?
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I have a 79 with 78-80 forks on it.
The kit is 11-1109.

Here are the pictures I have.
Stock springs (bottom) and progressive together (top).


Stock spring with spacer on it.


Progressive spring with spacer on it.


And this is how far they will go into the right fork. Didn't try the left. Maybe I'll take the caps off the parts forks in the basement for comparison.







1979 CX500 Supertanker
ATGATT makes riding a bike like a sled easier.

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   07-09-2009, 6:28 PM
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Re: Progressive Fork Springs - Where and how much recently?
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I'm at a loss, except for that last picture those look the same as mine. This might sound stupid, but you're sure theres nothing else in your fork, the small spring didn't fall down in there or anything? I don't know what else would be inside the fork to hold up the progressive spring. My springs didn't just fall right down, I did have to move them around a bit to get them to go down, but it wasn't a major hassle. Worst case you could call/email Progressive and see if they can help. Have you asked Larry about his?
1979 cx500D - mostly stock

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   07-09-2009, 6:49 PM
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Re: Progressive Fork Springs - Where and how much recently?
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Just talked to Larry and he said they should just fall in.

In addition to this. Remember when we were looking and wondering size. Well I wrote progressive and the answer I got back from them was the thickness is.

The part # 11-1109 is correct for your year make and model and the OD of the part is .86 or 22mm.

Well here's some extra info and yes just for luck I tried the sent in the basement and they were even more of a no go.

Ok so the measurements on the ones I have that are labeled in the right box are.
29/32 which comes out to .90625
Stock are 27/32 which is .8437.  so I guess I know what I have to do. Damn it Phat Performance. $80 was to good to be true.

1979 CX500 Supertanker
ATGATT makes riding a bike like a sled easier.

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   07-09-2009, 7:09 PM
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Re: Progressive Fork Springs - Where and how much recently?
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I wonder if there was a screw up in the shipping dept, maybe the wrong size springs ended up in the box? That's wicked annoying either way. I bought mine from the same place, they should be able to exchange your's or give a refund, right?
1979 cx500D - mostly stock

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   07-09-2009, 7:31 PM
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Re: Progressive Fork Springs - Where and how much recently?
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I hope it's that simple. I read the return policy and it said if they were used they were not refundable or returnable. Since they were never actually used I don't see a problem. So I just emailed them and explained that I thought they were big out of the box so I measured them. I listed their size, the stock spring size and the size progressive quoted to me. And I left out of the email that I tried to install them. I also sent a picture of the stock size against the preload and the progressive spring against the preload.

Hope that helps. Damn it. I wanted to get these in before going on vacation saturday. I just hope they reply and I can get these damn things in the mail before I leave. I suppose I could take them with and mail them from anywhere.

I also mentioned in the email about asking if they could measure the next set for me.

1979 CX500 Supertanker
ATGATT makes riding a bike like a sled easier.

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   07-10-2009, 6:11 AM
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Re: Progressive Fork Springs - Where and how much recently?
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Sounds like it may still be best to buy directly from progressive then, eh?

 Blindstitch wrote:
I just emailed Progressive Suspension to see if they could give me a spring diameter but if you want to get some now I recommend going and buying directly from them. Price is $92.95

http://www.progressivesuspension.com/productsearch.aspx


1983 CX650 Turbo
1982 CX500 Custom
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   07-10-2009, 8:04 PM
gary50 is not online. Last active: 7/23/2010 6:45:39 PM gary50

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Re: Progressive Fork Springs - Where and how much recently?
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For what it may be worth "Race Tech" has high grade after market springs for 33mm forks. I just checked their site. I believe cost is $109.00 I don't know if they sell their emulators for the CX sized forks or not?
Cheers, 50gary
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   07-11-2009, 5:17 AM
Blindstitch is not online. Last active: 7/22/2010 2:52:31 AM Blindstitch



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Re: Progressive Fork Springs - Where and how much recently?
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 wildmanwill wrote:
Sounds like it may still be best to buy directly from progressive then, eh?

 Blindstitch wrote:
I just emailed Progressive Suspension to see if they could give me a spring diameter but if you want to get some now I recommend going and buying directly from them. Price is $92.95

http://www.progressivesuspension.com/productsearch.aspx



Yep. But you only kick yourself when it doesn't work. Funny what one will do to save $20.

1979 CX500 Supertanker
ATGATT makes riding a bike like a sled easier.

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   07-17-2009, 4:17 PM
Blindstitch is not online. Last active: 7/22/2010 2:52:31 AM Blindstitch



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Re: Progressive Fork Springs - Where and how much recently?
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About a week into this problem and it is still a mess. The email I just got seconds ago said that their distributor checked their inventory on the springs and this is what was said.


They finally got back to me today.  He said they went through
all their warehouse inventory and they are all mispackaged.  He
suggested that you contact Progressive directly to see if there is
anyway that they can send the replacements directly to you.


Feeling pretty screwed at the moment. Every time I mention a return they avoid it and try to send me in another direction. Cant recommend this company to anyone at the moment. I hope it gets better.

1979 CX500 Supertanker
ATGATT makes riding a bike like a sled easier.

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   07-17-2009, 4:23 PM
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Re: Progressive Fork Springs - Where and how much recently?
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Damn, wicked sorry. I feel responsible since I ordered from them and said everything was fine. How the H**L do they mispackage their warehouse? I guess they are off the list of places to buy from.
1979 cx500D - mostly stock

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   07-18-2009, 1:08 PM
Blindstitch is not online. Last active: 7/22/2010 2:52:31 AM Blindstitch



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Re: Progressive Fork Springs - Where and how much recently?
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Well I'm still working on resolving this issue and I contacted progressive about it. Phat agreed to take them back if progressive cant help me.

For all I know the reason why there were problems with other members and progressive springs could be because of this. They didn't state which company they actually processed the order through. So I'll give it a few more days and see what progressive has to say.

I guess it's better that I get screwed and figure it out instead of a ton of people getting the same results.

1979 CX500 Supertanker
ATGATT makes riding a bike like a sled easier.

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   07-18-2009, 8:42 PM
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Re: Progressive Fork Springs - Where and how much recently?
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Good luck man, I'm looking to get some of those myself pending your review!

'78 CX500 - Back from the brink!
'81 CX500C- Finally Running thanks to Ignitech!
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   07-19-2009, 6:43 PM
ujm is not online. Last active: 12/20/2009 4:04:49 AM ujm



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Re: Progressive Fork Springs - Where and how much recently?
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I guess I'm glad to have a GL, I just add some air and all is good.

:)
Steve

honda919rider@yahoo.com
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   07-19-2009, 7:26 PM
Blindstitch is not online. Last active: 7/22/2010 2:52:31 AM Blindstitch



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Re: Progressive Fork Springs - Where and how much recently?
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They offer a kit for the gl too. 11-1111

1979 CX500 Supertanker
ATGATT makes riding a bike like a sled easier.

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   07-20-2009, 9:50 AM
Blindstitch is not online. Last active: 7/22/2010 2:52:31 AM Blindstitch



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Re: Progressive Fork Springs - Where and how much recently?
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Got a message from Justin at Progressive Suspension today that brightened my day.

The simple message was send me your address and we will ship out a set free of charge. It's not even anywhere near their fault or problem but they are willing to correct it. I guess I found another good company for my list.

1979 CX500 Supertanker
ATGATT makes riding a bike like a sled easier.

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   07-20-2009, 10:09 AM
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Re: Progressive Fork Springs - Where and how much recently?
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Wow, that's great! Hope these work for you finally.
1979 cx500D - mostly stock

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   07-20-2009, 7:13 PM
Blindstitch is not online. Last active: 7/22/2010 2:52:31 AM Blindstitch



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Re: Progressive Fork Springs - Where and how much recently?
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Yeah me too. But for the price they will probably be shipped ultra snail mail. But that's ok I have another toy coming to install first. And a search for good motorcycle gloves in my budget that fit.

I guess the next question is do I add the other springs to a box in the closet of unused stuff or see if I can send them back? Maybe someone with 35mm forks will want to buy a cheap set after this fun is over. Pretty sure since the clearance issue is .004 then the bigger forks would easily take them. May just need to experiment with a spacer.

1979 CX500 Supertanker
ATGATT makes riding a bike like a sled easier.

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   07-26-2009, 1:10 PM
jazzmans is not online. Last active: 5/21/2010 8:55:57 PM jazzmans



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Lost Wages
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Re: Progressive Fork Springs - Where and how much recently?
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Have you received the replacement springs yet?

I'm dying to put progressives on my 79, but am waiting for your results to 'jump'


Thanks!


jaz



life is what happens while you are making other plans.

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