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Old 10-26-2005, 07:02 AM   #1
JohnTM OP
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Joined: Oct 2001
Location: Cornersville, TN
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R100 clutch won't release

A friend has a clutch on a R100 that won't release. New plate, new spring, new rods, crank isn't shifted back, no marks on the flywheel. Any thoughts?
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Old 10-26-2005, 07:11 AM   #2
norton73
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Quote:
Originally Posted by John™
A friend has a clutch on a R100 that won't release. New plate, new spring, new rods, crank isn't shifted back, no marks on the flywheel. Any thoughts?
Clutch cable length?

Did he just install the new clutch, or was it done a while ago?
Did he check the splines on the input shaft? Rust or wear could make the clutch disc hang up.
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Old 10-26-2005, 08:41 AM   #3
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He's replaced just about everything. Maybe he got the wrong plate and it is thicker? Is there a difference between models?
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Old 10-26-2005, 08:54 AM   #4
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Quote:
Originally Posted by John™
He's replaced just about everything. Maybe he got the wrong plate and it is thicker? Is there a difference between models?
What year is the bike?

Looking at my Clymer manual, page 223, clutch specs;

Friction plate;

R50/5, R60/5, R60/6 R60/7,
1979-1980 R65 Min thickness 2.4 mm

R75/5, R75/6, R75/7, R80/7 2.6 mm

All 900cc, 1977-1980 1000cc 2.8 mm

1981 - up 4.5 mm


Certainly looks like if it's a pre-81 model, a later model friction plate could be a problem.
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