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General Category >> Rubber Side Down! >> Clutch slip
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Message started by AngloSaxon on 05/15/09 at 08:19:00

Title: Clutch slip
Post by AngloSaxon on 05/15/09 at 08:19:00

I have an '87 with 9000 miles on it. I noticed that when in top gear, if I crank on the throttle the clutch slips a little. What I'm thinking of doing is replacing the springs or even adding a washer under the old springs. Thoughts anyone?
If I go the washer route, does anyone know the ID and OD of the clutch springs?

Title: Re: Clutch slip
Post by verslagen1 on 05/15/09 at 08:43:24

The washer thing has been done, only caution I would give you is becarefull not to go to thick and overcompress the springs.

Title: Re: Clutch slip
Post by marshall13 on 05/15/09 at 09:56:09

if the springs are fatigued, replace them, dont shim them....if they're not fatigued, then shimming would be a bandaid for another problem, not a repair.... are you running an oil that could cause the slip? are the plates worn? is the basket worn? better to do a full teardown on the clutch, and repair the problem, then just try to increase compressive force on the plates.....

Title: Re: Clutch slip
Post by justin_o_guy2 on 05/16/09 at 01:03:03

at 9.000 miles, IF the clutch is actually worn enough to slip, someone has used it poorly. I would look at the oil first, unless you know you tend to slip the clutch a lot & expect it to be worn out. The wrong type of oil will sure make them slip.

IF you do go with washers, be aware , the thickness of washers varies greatly & the landing for the springs is machined into the casting. A washer will sit on top of the machined area, causing each spring to be loaded differently. I stacked mine on a bolt & chucked that up in the drill press & used a grinder to "turn" the washers down to the needed OD.

I sorted thru a bunch of washers with the calipers before I found the ones with a small difference in thickness I wanted.

Title: Re: Clutch slip
Post by Sandy Koocanusa on 05/16/09 at 06:41:20

I just had a very similar problem. I was running a Castrol synthetic product that wasn't rated for motorcycles. Switching back to good old forty weight dino juice cleared it right up.