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67
Tuning
Clutch
There are performance characteristics to observe and things to measure.
1) Performance characteristics to observe
a) Clutch coming in
too late
i) Engine rev’s to a high RPM before moving the motorcycle
ii) Clutch never fully engages on a reasonable straight stretch
iii) Basket turns blue in short amount of time
b) Clutch coming in
too early
i) Motorcycle moves too soon when accelerating off idle
ii) Motorcycle moves but not with much power
iii) Clutch fully engages before the ‘power band’ kicks in
2) Things to measure that can have an effect
a) Spring washer configuration
b) Spring stack without flat washer
c) Thickness of flat washer
d) Individual spring washer thickness
e) Individual spring washer height
f) Effective bolt shoulder length
g) Shoe thickness (difficult to measure accurately - can only be approximated
by the size of the step where it sticks out of the basket)
h) Basket has worn and is too large
There is a relationship between observed characteristics and the things
that can be measured
If a clutch comes in
too early
, it means that clutch spring stack is
not providing
enough force
to keep the shoes from being thrown out to the clutch basket at
the proper time with the given shoes, basket, arbor, and bolt. This can be due to:
1. Clutch spring stack is to short
Wrong
configuration
Sacked out (over stressed) washers
Too thin a flat shim in the stack
2. Spring rate too low (wrong configuration with proper stack height)
3. Clutch arbor shoulder bolt is too long
If a clutch comes in
too late
, it means that clutch spring stack is
providing
too
much force
to keep the shoes from being thrown out to the clutch basket at the
proper time with the given shoes, basket, arbor, and bolt. This can be due to:
1. Clutch spring stack to tall
Wrong
configuration
Too thick a flat shim in the stack
Summary of Contents for CX50FWE
Page 24: ...24 Parts Engine Bottom End and Transmission ...
Page 26: ...26 Parts Engine Clutch and Kick Lever ...
Page 31: ...31 This Page Intentionally Left Blank ...
Page 32: ...32 Parts Forks Triple Clamps ...
Page 34: ...34 Parts Forks Leg Assembly Brake Side ...