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Technical Help Forum
Started by gregoryjewell at 06-30-2009 1:22 PM. Topic has 37 replies.
  
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 06-30-2009, 1:22 PM
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gregoryjewell
 
Joined on 07-02-2008
joplin, mo
Posts 523
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my fan hasnt completely come apart but the hub is starting to separate from the blades causing a noise and vibration has anyone had any success repairing this or am i looking at a $45 replacement fan?
79 cx500 custom on the road once again
78 standard (parts bike)
79 cx500 custom (parts bike sitting 1500 miles away)lol
cant nobody hold me down oh no i got to keep on moving
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06-30-2009, 1:31 PM
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Shep
Joined on 01-30-2007
UK.2x1980CX500A
Posts 7,650
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06-30-2009, 1:34 PM
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Oldlonely
Joined on 04-12-2009
Gold Coast, Australia.
Posts 181
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I think it would be easier just to go and buy a new one. Will give you better piece of mind as if it comes apart you'll probably be up for a new radiator core as well.
$45.00 sounds ok, these fans are $80.00 from the Honda dealer here !
Oldlonely.
1978 CX500 Shadow. Black - Resto Project.
1979 CX500 Shadow. White - Daily Ride.
1979 CX500 Shadow. Blue - Parts Bike
1981 CX500 Custom. (Just a Pile of Parts) !!
1980 Suzuki GSX750. (Yes, another project) !!
1972 Suzuki RL250.
Age: 46
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06-30-2009, 1:39 PM
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Abes_CW
Joined on 04-17-2007
saskatoon
Posts 3,037
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I just ordered one from discounthonda, I think it was $31 before the discount.
1983 GL650i
Had 4 CX/GL's at one point this year, down to one, next spring is another adventure!
age 38 (29 plus tax)
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06-30-2009, 2:03 PM
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gregoryjewell
Joined on 07-02-2008
joplin, mo
Posts 523
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![Devil [6]](http://choppercharles.com/cs/emoticons/emotion-14.gif)
Re: fan repair?
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a buddy of mine has a 600 ninja parts bike with electric fan i think i might "borrow" the fan off of it and see what i can do
79 cx500 custom on the road once again
78 standard (parts bike)
79 cx500 custom (parts bike sitting 1500 miles away)lol
cant nobody hold me down oh no i got to keep on moving
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06-30-2009, 5:31 PM
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gregoryjewell
Joined on 07-02-2008
joplin, mo
Posts 523
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![Yes [Y]](http://choppercharles.com/cs/emoticons/emotion-21.gif)
Re: fan repair?
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well its done electric fan off of a 95 600 ninja mounted in about 5 min no grinding or fabing!!! used these nylon rods used for mounting transmission coolers to cars they just pass thru the radiator then have a retainer that holds them tight . its just wired direct right now but come pay day i will do what shep did with the temp sending unit. thanks to all for the help
79 cx500 custom on the road once again
78 standard (parts bike)
79 cx500 custom (parts bike sitting 1500 miles away)lol
cant nobody hold me down oh no i got to keep on moving
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06-30-2009, 5:35 PM
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FOTO FRANK
Joined on 04-15-2009
Knoxville, Tennessee
Posts 114
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Keep us up to date on how that works out fer ya!
I am looking at the same thing.
'82 GL500I
aged 61 yrs.
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06-30-2009, 5:40 PM
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Blue fox
Joined on 04-18-2008
COLUMBIA, MISSOURI
Posts 1,533
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Can you post a pic? And you didn't have to shorten the camshaft? Sounds like a sweet deal to me.
Blue Fox
1983 GL650I, 79-CX500C, 1980 CX500C, 82-GL500I, 82-GL1100, 76-CB550, 81-CB750C, 73-CB350F, 71-CT90,
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06-30-2009, 7:42 PM
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Blindstitch
Joined on 03-14-2009
Greenfield Wisconsin
Posts 9,863
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There are some super thin fans out there that can be used without cam shortening. I've thought about the same myself but the old standby is working pretty good.
Someone also mentioned using a fan to what I thought was a mazda but I could be wrong.
1979 CX500 Supertanker
ATGATT makes riding a bike like a sled easier.
Quick Reference
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06-30-2009, 7:44 PM
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gregoryjewell
Joined on 07-02-2008
joplin, mo
Posts 523
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well the bikes been outside ideling since my last post staying just under where the white area gets bigger i didnt have to shorten the cam but i cant put the bolt back in the end of it either theres a very minamal clearance but its not rubbing as far as the rods they are quick-mount nylon mounting rods with vibration pads made by hayden automotive part #210 hope this helps for someone else as much as it did me oh and by the way shep wasnt kidding when he said its peppyer spunn the tire in some gravel and pulled the front wheel when it hit pavement never did that before (without trying) no pics for now lost the usb cable to my camera and old a$$ computer dont have sd slots will post when i find it
79 cx500 custom on the road once again
78 standard (parts bike)
79 cx500 custom (parts bike sitting 1500 miles away)lol
cant nobody hold me down oh no i got to keep on moving
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07-01-2009, 4:15 AM
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Shep
Joined on 01-30-2007
UK.2x1980CX500A
Posts 7,650
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07-02-2009, 5:47 PM
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gary50
Joined on 09-02-2008
Posts 251
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Shep and Gregoryjewell, thanks for the "cool" idea I just bought a 1993 Ninja ZX600 radiator fan for $9.99 + $7.92 for shipping. According to the listing all ZX600 fans are the same from years '90 to '96 so I should be okay.
Cheers, 50gary
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07-02-2009, 7:06 PM
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gregoryjewell
Joined on 07-02-2008
joplin, mo
Posts 523
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well went to walmart and got a usb sd card reader still need to pull radiator back off to get pics (rainy day no garage) but i will get them as soon as possible
gary50 the only hard part to this upgrade is positioning the fan just right i put mine in the top left corner of the radiator it does need to be wired into a switch of some sort even a toggle switch would work i rode it into town last night and the bike took a little longer to warm up and it was about 75 deg out good luck you wont regret it
79 cx500 custom on the road once again
78 standard (parts bike)
79 cx500 custom (parts bike sitting 1500 miles away)lol
cant nobody hold me down oh no i got to keep on moving
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07-02-2009, 9:16 PM
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prairie
Joined on 05-25-2009
central Iowa
Posts 99
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I just picked up a replacement mech fan, $43 before tax. BTW no tach drive seals there either.
1973 CB350G
1978 CX500 Lumpy
1982 GL500 (just got it woo hoo!)
1989 NT650 or Hawk GT
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07-03-2009, 4:14 AM
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Shep
Joined on 01-30-2007
UK.2x1980CX500A
Posts 7,650
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 gregoryjewell wrote: | well went to walmart and got a usb sd card reader still need to pull radiator back off to get pics (rainy day no garage) but i will get them as soon as possible
gary50 the only hard part to this upgrade is positioning the fan just right i put mine in the top left corner of the radiator it does need to be wired into a switch of some sort even a toggle switch would work i rode it into town last night and the bike took a little longer to warm up and it was about 75 deg out good luck you wont regret it
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With the Electro mechanical temp sensor switch fitted my CX warms up
much faster than with the mechanical fan as one would expect.It's been around 3 months now and we have just had a week of very warm weather over here in the UK and the system has worked flawlessly.With freshly serviced carbs my CX has a helluva kick on the throttle now :)
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07-04-2009, 8:12 PM
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gregoryjewell
Joined on 07-02-2008
joplin, mo
Posts 523
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well here you go when i pulled the radiator back off i realized that the cam was rubbing the back of the fan i fixed this by slightly bending the three arms on the fan to move the fan closer to the radiator i now have more than enough clearence
heres my best help
79 cx500 custom on the road once again
78 standard (parts bike)
79 cx500 custom (parts bike sitting 1500 miles away)lol
cant nobody hold me down oh no i got to keep on moving
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07-05-2009, 5:39 AM
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rickbert
Joined on 01-05-2009
Missouri....60 mis East of KC
Posts 1,384
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I'm just copying and pasting this from another thread about fans...is a very valid question LOL :
Myself, and mabye I'm missing something here, but I don't see the benefit of a thermostat controlled fan over one that just spins all the time ???? Seems like a hassle for nothing ? Now if the shaft is messed up and you CAN'T put another stock blade on then ok, but if not why bother with electric ?
Just wondering...thanks !
1982 CX500C...22K miles...owned since 10/08
My age: 45
Bike's name: "Long Cool Woman in a Black Dress"
If you need to contact me personally send an email, I never get my pm's for some reason.
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07-05-2009, 6:36 AM
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Shep
Joined on 01-30-2007
UK.2x1980CX500A
Posts 7,650
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| rickbert wrote: | | I'm just copying and pasting this from another thread about fans...is a very valid question LOL :
Myself, and mabye I'm missing something here, but I don't see the benefit of a thermostat controlled fan over one that just spins all the time ???? Seems like a hassle for nothing ? Now if the shaft is messed up and you CAN'T put another stock blade on then ok, but if not why bother with electric ?
Just wondering...thanks ! |
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1:Mechanical fans are inefficient using energy all the time even when not needed hence why they were discontinued not long after these engines were designed.
2:My modifications and the above do not affect the re-fitting of a standard fan if required.
3:There is virtually no chance of an Electric fan exploding and taking out the Radiator that has happened more than once on these engines and has been posted on here because of worn Mechanical fans.
4:As parts become scarcer a modern alternative is a great option.
My 10 penn'th 
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07-05-2009, 6:57 AM
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rickbert
Joined on 01-05-2009
Missouri....60 mis East of KC
Posts 1,384
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Shep:
I knew I'd get some quality answers from you. Well put, makes sense !
1982 CX500C...22K miles...owned since 10/08
My age: 45
Bike's name: "Long Cool Woman in a Black Dress"
If you need to contact me personally send an email, I never get my pm's for some reason.
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07-05-2009, 7:44 AM
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Shep
Joined on 01-30-2007
UK.2x1980CX500A
Posts 7,650
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07-05-2009, 10:05 AM
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t053376
Joined on 03-02-2008
B.C. Cananda
Posts 332
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I think someone previously mentioned that in cool weather, the electric fanned engine would come up to operating temp sooner. At the other end of the spectrum, the electric fan runs at optimal rpm all the time allowing more efficient cooling in hot stop and go traffic. Obviously the camshaft driven fan is engine rpm dependant.
80 Custom / prev
83 GL 650I / prev
67 S65 Step thru in restoration
82 Custom / current
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07-30-2009, 7:38 AM
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Shep
Joined on 01-30-2007
UK.2x1980CX500A
Posts 7,650
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| t053376 wrote: | I think someone previously mentioned that in cool weather, the electric fanned engine would come up to operating temp sooner. At the other end of the spectrum, the electric fan runs at optimal rpm all the time allowing more efficient cooling in hot stop and go traffic. Obviously the camshaft driven fan is engine rpm dependant.
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My engine warms up much faster now 
My Music
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07-30-2009, 12:57 PM
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uprubicon14
Joined on 08-29-2008
Maple Plain, MN
Posts 126
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I rode across Nevada 2 weeks ago in 100+ temps with a stock 1981 CX fan and at times I had to increase speed to lower the coolant temp. Never got too close to red, but it was warmer than I'd ever seen it. When I increased the RPM's the temp dropped back where it usually runs. So the mechanical fan's efficiency is definately related to engine RPM. I am going to put in an electric fan on this Fall.
1981 CX500 Custom
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07-30-2009, 2:58 PM
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Clumzi
Joined on 01-26-2009
Olympia Washington
Posts 636
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Man, seeing pictures of the ninja fan and those three nylon rod/mounts, I'm going to keep an eye out for a cheap Ninja 600 fan. The fan, nylon rods and a toggle switch and it looks like you are just about there. I'm into it! This looks like something even my dumb ass can manage :). Not sure though, cam chain adjustment just about kicked my ass this morning :P. -nick
1979 CX Rat Sport
(EMGO pods, wrapped MAC 2in1, 90/130 re-jet, 18" rear wheel, 50 cal ammo cans, Viper cafe faring, $.97 rattle can flat black)
1987 Toyota Van (Whitey)
2002 Subaru Legacy GT (Spiffy)
Motorcycles should be black and dirty :)
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09-05-2009, 9:23 PM
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saltwatersurf
Joined on 07-21-2008
Twin Cities, Minnesota
Posts 178
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Got a Ninja fan on my bike today and used the tip from gregoryjewell to use the nylon rods. (found them at the local) I put them on opposite of your photo. I hope that won't matter. I found that the fan just touched the cam shaft so I made a little bracket that allowed me to move the lower part of the radiator forward. That left some space between the two. I also added a toggle switch until my temp sensor arrives. That was my first wiring job and it took me most of the day!
Flat Black 1978 CX500 10,000 12,000 , 21,000 wonderful (s)miles
Maroon 1979 CX500 Custom 9800 miles, selling
BlueFlames 1979 CX500 ? 25,000 miles, in boxes
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09-06-2009, 4:29 AM
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Shep
Joined on 01-30-2007
UK.2x1980CX500A
Posts 7,650
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| saltwatersurf wrote: | Got a Ninja fan on my bike today and used the tip from gregoryjewell to use the nylon rods. (found them at the local) I put them on opposite of your photo. I hope that won't matter. I found that the fan just touched the cam shaft so I made a little bracket that allowed me to move the lower part of the radiator forward. That left some space between the two. I also added a toggle switch until my temp sensor arrives. That was my first wiring job and it took me most of the day!
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Great work.Switches should be with you with luck probably after next week depending on the Mail.They have a small screw able bracket that we don;t use.Just metal bond that with the sensor to the position like on my link,
http://globalcxglvtwins.hostingdelivered.com/viewtopic.php?f=7&t=209
Even on the hottest day over here and stuck in traffic my fan has kept the engine around the nominal mark on the temp gauge so it's much more efficient than the Mechanical fan.
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10-06-2009, 9:38 AM
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gregoryjewell
Joined on 07-02-2008
joplin, mo
Posts 523
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just an update the fan is working flawlessly it's still wired direct but i'll fix that one of these days
79 cx500 custom on the road once again
78 standard (parts bike)
79 cx500 custom (parts bike sitting 1500 miles away)lol
cant nobody hold me down oh no i got to keep on moving
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10-06-2009, 12:10 PM
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Shep
Joined on 01-30-2007
UK.2x1980CX500A
Posts 7,650
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10-11-2009, 7:00 PM
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mrmatt8826
Joined on 10-12-2009
Posts 6
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Pretty off topic - but since when I was looking up how to replace my fan on my cx500c, I can across this site. I wanted to share with the world that if you don't have a rotor puller to get the fan off (I spent like 6 hours pulling on the fan without success), a dangerous but successful way to get it off, is use a hammer to oppose the motion of the fan, and then tap the starter to give it some torque... breaks the frictional seal nicely.
Also - as mentioned above when discussing the benefits of an electric fan, the reason I needed to replace mine in the first place was because the fan basically "exploded" bending up the blades which damaged the radiator enough to need to replace that as well... Luckily I found a used radiator on ebay for 2.99 when it would normally cost $450 to order from honda or a powersports shop!
Someday I'm gonna have to look into this electric fan stuff - it sounds like a good idea!
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05-17-2010, 4:13 PM
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BillRod
Joined on 11-09-2009
Richton Park, IL 33 miles SW of Chicago
Posts 353
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Does anyone know the distance (in inches) from the old mechanical fan fitting on the camshaft to the back of the radiator. It would help to be able to find a fan that would fit without major modifications. Thanks BillRod
71 years old (April 1939)
Richton Park, Illinois
Just bought 1982 GL500 Naked 13,000 miles
Never worry about theory as long as the machinery does what it is supposed to do.
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05-18-2010, 7:49 AM
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Rusty
Joined on 08-09-2007
Long Beach California USA.
Posts 206
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I too have a question. Regarding the temp sensor switch. I am not running any gauges, so my temp gauge sending unit is just sitting there. Is there a fan temp switch that will fit in that same threaded hole? And should a fan relay be used?
Rusty
1981 CX500C
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05-18-2010, 7:57 AM
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Shep
Joined on 01-30-2007
UK.2x1980CX500A
Posts 7,650
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05-20-2010, 4:57 PM
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Mothman52
Joined on 09-23-2008
Berkeley, CA
Posts 785
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OK, my question is I understand the benefits of an electric fan but I don't see how it can make the bikes "peppier" — performance-wise....
Quicker to warm up? Yes. More reliable? Yes. But peppier? Duhh.....?
1982 CX500C in Metallic Black & Gray
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05-20-2010, 5:54 PM
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Shep
Joined on 01-30-2007
UK.2x1980CX500A
Posts 7,650
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| Mothman52 wrote: | | OK, my question is I understand the benefits of an electric fan but I don't see how it can make the bikes "peppier" — performance-wise....
Quicker to warm up? Yes. More reliable? Yes. But peppier? Duhh.....? |
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Mechanical fans have to get there energy from somewhere.The somewhere is the engine.Removing the Mechanical fan from the equation allows the engine to use less energy.No modern or automotive vehicles that I know of have used mechanical fans since the early 1980s because they are very inefficient.Even Honda on the 650s and I think Turbos which were on the cusp of this change used thermostatically controlled electric fans.
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05-21-2010, 11:04 AM
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Mothman52
Joined on 09-23-2008
Berkeley, CA
Posts 785
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Thanks, Shep. I never thought twirlling that little hunk of plastic would tax the engine that much. I'm now intrigued with the possibilities....
I just had a thought. I've seen vehicles that use a temperature-sensitive clutch to engage the fan. Would that not work in this situation, only using the bike's power when needed?
1982 CX500C in Metallic Black & Gray
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05-21-2010, 11:32 AM
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Shep
Joined on 01-30-2007
UK.2x1980CX500A
Posts 7,650
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| Mothman52 wrote: | | Thanks, Shep. I never thought twirlling that little hunk of plastic would tax the engine that much. I'm now intrigued with the possibilities....
I just had a thought. I've seen vehicles that use a temperature-sensitive clutch to engage the fan. Would that not work in this situation, only using the bike's power when needed? |
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I wouldn't complicate the issue.It took me two years on and off to make it as simple as possible.Not a complete two years but I had to put it on hold a couple of times whilst working some contracts etc.
Note:The power gains aren't massive but all the other factors already stated,
http://globalcxglvtwins.hostingdelivered.com/viewtopic.php?f=7&t=209&p=1528&hilit=electric+fan#p1528
make it a,"No Brainer" for me.If you felt the zippiness of my CX I think you would be impressed.
Mech Fan,balanced carbs and tuned Harley 883s exhausts and it pulls like train and accelerates superbly and with 20w fork oil and good tyres handles like a dream.
I've ridden my CX alongside many modern bikes/riders and never once felt I could be left behind on the,"Twisties" by most of them and in some cases have had to pass less able riders and send them to the back because they were endangering me.
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05-21-2010, 2:05 PM
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Mothman52
Joined on 09-23-2008
Berkeley, CA
Posts 785
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You da MAN. I'm not gonna try an reinvent the wheel....or fan, in this case:-/
1982 CX500C in Metallic Black & Gray
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05-21-2010, 4:01 PM
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Shep
Joined on 01-30-2007
UK.2x1980CX500A
Posts 7,650
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Honda CX500 & G... » CX500 GL500 Tra... » Technical Help ... » Re: fan repair?
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