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Technical Help Forum
Started by Doward at 03-10-2010 8:35 AM. Topic has 14 replies.
  
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 03-10-2010, 8:35 AM
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Doward
 
Joined on 05-11-2008
Alachua, FL
Posts 816
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Getting aggrevated with this clutch...
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I'm going to pull it back apart again tonight - even with the new EBC springs, it's still slipping. The Rotella T I'm using is JASO-MA certified, so that shouldn't be a problem.
I'm thinking of pulling the clutch plates back apart, and scuffing them with some 220 grit sandpaper just to make sure there's no glazing issues - I remember the steel plates having dimples, but being really smooth to the touch.
I'm wondering if scuffing up the friction mating surfaces won't increase the available friction for the plates?
1978 CX500 motor + 1980 CX500C frame
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03-10-2010, 2:38 PM
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Sams GL 650
Joined on 02-17-2010
Annville PA (USA)
Posts 191
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Re: Getting aggrevated with this clutch...
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I don't know D.
Clutch slip can be from worn clutch discs. The manual lists Disc A 2.3mm (0,091in) and Disc B 3.1mm (0.122in)
Your springs and oil are good.
Clutch cable O.K.,- i.e.,- not too tight?
Bikes: 2002 Kawasaki Vulcan
1983 Honda GL 650
1 st Bike Honda CL 175 (1974)
Age 52
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03-10-2010, 2:41 PM
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Doward
Joined on 05-11-2008
Alachua, FL
Posts 816
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Re: Getting aggrevated with this clutch...
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Yep, all the discs measure out fine - clutch cable is plenty loose.
Let me ask this, as well - at what point is the clutch arm on the cover when all the slack is out? Mine sits almost right at 9 o'clock when all the slack is pulled out (as checked by just pushing it with my finger)
1978 CX500 motor + 1980 CX500C frame
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03-10-2010, 4:04 PM
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Doward
Joined on 05-11-2008
Alachua, FL
Posts 816
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Re: Getting aggrevated with this clutch...
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Just pulled it all back apart, scrubbed everything clean with soap and
water, and lightly hit EVERY friction area with a 120 grit piece of
sandpaper.
Here's the measurements of the discs:
(Moving from the front of the clutch assembly towards the rear)
Clutch Disc B1 - 3.52mm thick
Clutch Disc A1 - 2.58mm
Clutch Disk A2 - 2.64mm
Clutch Disk A3 - 2.58mm
Clutch Disk A4 -2.55mm
Clutch Disk A5- 2.59mm
Clutch Disc B2 - 2.72mm (furthest in aka pressure plate disc)
According to my CX500 Service Manual, the service limit on Disc B1 is 3.1mm (I'm @ 3.52) and the A discs are all 2.3mm (and you can see I'm not there on any of them)
I'm really hoping scuffing everything does the trick. I'm dead sick of the slip. :(
1978 CX500 motor + 1980 CX500C frame
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03-10-2010, 4:25 PM
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CXSarnia
Joined on 01-11-2008
Sarnia, Ontario, Canada
Posts 2,629
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Re: Getting aggrevated with this clutch...
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There was an article somebody posted a while back - the thickness of the gasket material has to be spot on. The difference between aftermarket, and OEM Honda gaskets was so slight, but the difference on the clutch was noticeable.
2009 DN-01 Spakin' New!
1982 CX500 Turbo & Parts bike
1981 SL185 Yamaha Exciter
198? V45 Magna
1979 CX500 Deluxe
1982 CB750K Daily rider September 1999
1982 CX500 Custom - project Originally bought April 1982 safetied and on the road 09/2008
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03-10-2010, 4:41 PM
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Doward
Joined on 05-11-2008
Alachua, FL
Posts 816
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Re: Getting aggrevated with this clutch...
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Difference how so? The only thing the gasket thickness should change is the point of contact between the cam actuator and the ball bearing that pushes against the star piece.
1978 CX500 motor + 1980 CX500C frame
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03-10-2010, 11:04 PM
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spanish bandit
Joined on 02-12-2009
southern spain
Posts 5,010
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Re: Getting aggrevated with this clutch...
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 CXSarnia wrote: | There was an article somebody posted a while back - the thickness of the gasket material has to be spot on. The difference between aftermarket, and OEM Honda gaskets was so slight, but the difference on the clutch was noticeable.
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sarnia,i was under the impression that the gasket thickness only applied to the rear case.[i cant remember a thread on the front being important,but i could be wrong ]
when i feel the need,i do it,llego,ve 60,s
-----------------------------
2008.1982 honda gli silverwing [uk model ]
2010.1981 honda gli silverwing [uk model ]
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03-10-2010, 11:52 PM
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Blindstitch
Joined on 03-14-2009
Greenfield Wisconsin
Posts 9,863
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Re: Getting aggrevated with this clutch...
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Yeah I don't think the gasket thickness on the front matters as long as the clutch cable is adjusted right.
Ok now that I said that. Gasket thickness shouldn't be crazy. I thought it was something small like 3/32 but for some reason that number doesn't seem right at the moment. Maybe it was 3/64. I swear there is a three in there.
1979 CX500 Supertanker
ATGATT makes riding a bike like a sled easier.
Quick Reference
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03-11-2010, 6:23 PM
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Doward
Joined on 05-11-2008
Alachua, FL
Posts 816
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Re: Getting aggrevated with this clutch...
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I've actually managed to re-use the stock gasket every time I've pulled the cover back off, with no leaks.
Rained all day, but I'll be on the bike tomorrow, so I'll report back with what happens.
1978 CX500 motor + 1980 CX500C frame
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03-12-2010, 5:42 PM
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Shep
Joined on 01-30-2007
UK.2x1980CX500A
Posts 7,651
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Re: Getting aggrevated with this clutch...
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03-12-2010, 8:27 PM
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Matt_the_Rat
Joined on 11-11-2008
Northwest FL
Posts 170
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Re: Getting aggrevated with this clutch...
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My clutch started to slip. I took it apart and found no real problem. But what I did see was just really old friction material. Those plates have been bathed in oil for a long time and they get saturated with the oil and the contaminates in it.
Dexron transmission fluid is full of detergents. soak the fiber plates in the transmission fluid and brush them with a tooth brush. Soon the transission oil will get black from the contaminates coming out of the fier. On the steel plates clean them with brake cleaner and get all the oil off of them and sand them with fine to med sand paper, just enough so you can see the sanding marks in the plates.
If you got good springs, that should work for a long time. When you put the cover back on, make sure the arm has some free play, and hook up the cable.
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03-13-2010, 8:38 AM
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Shep
Joined on 01-30-2007
UK.2x1980CX500A
Posts 7,651
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Re: Getting aggrevated with this clutch...
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03-13-2010, 10:07 AM
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Doward
Joined on 05-11-2008
Alachua, FL
Posts 816
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Re: Getting aggrevated with this clutch...
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Damn. I did scrub the clutch friction discs with soap and water, but I didn't soak them in ATF or anything of the sort.
Alright, so I'll find out Monday on the way to work how the clutch does - soaking and removing any contaminants will be the next step (after that, I'm putting the damn CX650 turbo clutch in and calling it a day. Let's see THAT slip on a stock CX500)
1978 CX500 motor + 1980 CX500C frame
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03-13-2010, 2:00 PM
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Shep
Joined on 01-30-2007
UK.2x1980CX500A
Posts 7,651
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Re: Getting aggrevated with this clutch...
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| Doward wrote: | Damn. I did scrub the clutch friction discs with soap and water, but I didn't soak them in ATF or anything of the sort.
Alright, so I'll find out Monday on the way to work how the clutch does - soaking and removing any contaminants will be the next step (after that, I'm putting the damn CX650 turbo clutch in and calling it a day. Let's see THAT slip on a stock CX500)
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I wouldn't soak them in ATF.You want something like Carb/Brake cleaner to brake down any grease and contaminants and then boil them as above.This has helped me in the past.Same with contaminated brake pads/shoes.
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03-14-2010, 5:43 PM
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Doward
Joined on 05-11-2008
Alachua, FL
Posts 816
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Re: Getting aggrevated with this clutch...
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I ran it all through the dishwasher, and replaced the worst disc (the 2.55mm thick one) with the best disc from the other engine (2.74mm)
1978 CX500 motor + 1980 CX500C frame
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Honda CX500 & G... » CX500 GL500 Tra... » Technical Help ... » Getting aggrevated with this clutch...
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