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clockton1
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VBMWMO #6116
Joined: 10/27/2006
Posts: 2

I thought I was in the final stretch after a few years of working on the R57 however I have hit a clutch issue. The clutch wont release allowing me to get into any gear. I have good pressure the entire time I pull in the clutch lever but yet no release allowing me to shift. Could my compression bolt be too short even though I am using the full motion?

Any ideas?


Bruce Frey
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VBMWMO #6316
Texas Hill Country, USA
Joined: 10/27/2006
Posts: 574
1928 R57 Clutch

It is possible.

Is yours a single or double disk? How does the thickness of the new clutch plate(s) compare to the old?

A lot of the R12 repop clutch plates are too thick and cause the problem you describe. Vech has solved this problem by using a hardened washer to shim the clutch top plate. This will space the outer thrust plate away from the flywheel just enough that the plates will fully release when the clutch lever is pulled. I would check with him for details.

If you have repop clutch parts, it is likely you could have this problem, too.

ciao,

Bruce

clockton1
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VBMWMO #6116
Joined: 10/27/2006
Posts: 2
1928 R57 Clutch

Bruce,

Its a single plate. I don't know the proper thickness as the original I had was so beat up it was impossible to tell if it was correct and the Bike wasn't running. I believe the that my current thickness is about 6.5mm but I cant recall exactly as its been awhile since I put it together.

Thanks

Curt

Bruce Frey
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VBMWMO #6316
Texas Hill Country, USA
Joined: 10/27/2006
Posts: 574
1928 R57 Clutch

I would call Vech and seek his advice on solutions for your application, but I think it is most likely a component thickness issue.

I can't tell you where I saw it, but 5mm sticks in my mind as a clutch disk thickness on the old bikes.

Bruce

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