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General Category >> Rubber Side Down! >> cleaning clutch discs
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Message started by Rivenin on 02/23/22 at 07:21:28

Title: cleaning clutch discs
Post by Rivenin on 02/23/22 at 07:21:28

I put on a Mikuni carb and my clutch, lets say, is not enjoying wide open throttle - normal throttle i'm good, but lets say i'm merging on the freeway or highway getting up to 65 - once you're in 3rd or 4th gear, you can only twist the throttle so much before you hear the RPM's start climbing and nothing happening.
Clutch is adjusted within spec, i use rotella T4 like i have in all my bikes, so i ordered some barnett clutch springs that should be here Monday that i'm going to toss in and see what happens.
i've seen some recomendations of cleaning the clutch discs... and i'm guessing it's just going to be using some light sandpaper on the friction plates along with some mineral spirits / soap and water.
Is this advised? might as well clean it up while i'm in there since i'll have it open.

pic because why not

Title: Re: cleaning clutch discs
Post by TheSneeze on 02/23/22 at 09:59:18

With stiffer springs you might want to consider putting in a stronger pawl. See the Beefing Up The Clutch thread for more info, or send me a PM.

Title: Re: cleaning clutch discs
Post by Ruttly on 02/25/22 at 10:07:22

Nice looking bobber , good job , I would ride that for sure.

Title: Re: cleaning clutch discs
Post by SpamyToo on 03/04/22 at 22:30:40

Ive tried several times to revive clutch discs and have never ever had any lasting success.

I would recommend tossing the friction discs and just replacing them. They are like 60 bucks for a set. At the price of oil right now your almost wasting that much with a few oil changes in this process. ;D

The metal discs can be de-glossed with some scotchbrite pads or not too aggressive sand paper.

From my experience you can fiddle and fight with the stupid contaminated plates for mediocre results for a month, or replace them and be riding this weekend hassle free.

And I love to fix stuff. It hurts me to say it even.

Title: Re: cleaning clutch discs
Post by SpamyToo on 03/04/22 at 22:36:51

Ive got to mention Ive seen two side cases jacked up because people refused to believe they had contaminated friction discs and instead washered up the springs, jammed in an extra disc and other stupid junk.

Swap those discs, use super plain ass engine oil and run it. Thats been my recipe for success for 2 of these bikes now over 10 years.

Title: Re: cleaning clutch discs
Post by Gary_in_NJ on 03/05/22 at 03:11:59

Replace the clutch. It’s a wear item and it’s done it’s job. You don’t try to revive your brake pads....

Your slipping clutch has nothing to do with you new carb.