bicycle engine clutch.

I did get it tighter and hopefully that will resolve my slippage issues. I'll test it tomorrow.

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LennyHarp of Lenny's Bikes & Things
http://lennyharp.net
The true value of a man is not judged by what he has, but rather by what he can do without.
"We are what we repeatedly do. Excellence, then, is not an action, but a habit." -- Aristotle

You can try sanding the pucks and pressure plate with some medium sandpaper.
Are you sure your clutch is releasing all the way (tension too tight on cable housing)?

I can't think of anything else.

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If it ain't broke, and you mess with it long enough, it will be.

So here's one...

My set screw was also gouging into the cover. I tried tightening the star nut, but then I just couldn't disengage the clutch. For now I have a thick cardboard gasket on there to prevent more scoring, but that's lead me to lose all but 2 of the cover plate screws

So here's a list of things that are funky with my clutch:

set screw grinds on cover plate.

the "plate" that the star nut holds on has some play in it both with the clutch engaged and disengaged. It can wiggle and make noise, and will rattle at higher rpms.

The set screw doesn't really set the star nut. If I "set" on one of the tabs of the nut, it lets the nut slip. If I set between the tabs, the nut has that little bit of room to rotate before hitting the screw.

I'm thinking what I need to do is turn the flower nut in all the way, then screw in the two adjusters on the cable, and reset the little brass thingie on the end of the cable. Then use the screw adjusters and try to get the clutch to be able to engage/disengage. Not sure that'll work, but it's worth a shot.

Any suggestions to keep that plate from rattling? Drives me nuts at higher rpms.

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http://www.jasonhight.net/videos/mot...etowork-sm.wmv

I did the sanding trick and the clean the pads trick and took needle nose pliers to the star nut and worked it in as far as I could while pulling the clutch lever. All that kept the clutch working for a few hundred miles till the motor mount bolt broke off at the block.

The set screw does go between the tabs of the nut and it can only back out so far before it hits the screw.

__________________
LennyHarp of Lenny's Bikes & Things
http://lennyharp.net
The true value of a man is not judged by what he has, but rather by what he can do without.
"We are what we repeatedly do. Excellence, then, is not an action, but a habit." -- Aristotle

Just as an update...

The newer "80cc" motors now have round clutch material pieces. Don't think the round have as much surface area as the older ones.

Had to take apart and tighten the star nut a bunch to stop the slipping / squealing after only 3 tanks of gas.