length YAMAHA TTR90 2001 User Guide

4 - 31
ENG

CLUTCH
EC484600
Clutch plate
1. Measure:
l
Clutch plate warpage
Out of specification
®
Replace clutch
plate as a set.
Use a surface plate
1
and thickness
gauge
2
.
EC484400
Clutch spring
1. Measure:
l
Clutch spring free length
a

Out of specification
®
Replace springs
as a set.
Push rod
1. Measure:
l
Push rod #2 bend
Out of specification
®
Replace.
Warp limit:
0.2 mm (0.008 in)
Clutch spring free length
Standard Limit
26.2 mm
(1.03 in)24.2 mm
(0.95 in)
Bending limit:
0.5 mm (0.02 in)
Primary clutch
1. Measure:
l
Primary clutch housing inside diameter
Out of specification
®
Replace.
Primary clutch housing inside
diameter:
105 mm (4.13 in)
: 106 mm (4.17 in)
2. Measure:
l
Clutch shoe groove depth
a

Out of specification
®
Replace.
Clutch shoe groove depth:
1.0 ~ 1.3 mm (0.039 ~ 0.051 in)
: 0.1 mm (0.004 in)