Service manual
Table Of Contents
- Inroduction
- Yamaha Motor Corporation, USA YZ/WR Motorcycle Limited Warranty
- How to use this Manual
- Index
- Contents
- Chapter 1 General Information
- Chapter 2 Specifications
- Chapter 3 Regular Inspection and Adjustments
- Chapter 4 Engine
- Seat, Fuel Tank and Side Covers
- Exhaust Pipe and Silencer
- Radiator
- Carburetor and Reed Valve
- Cylinder Head, Cylinder and Piston
- Clutch and Primary Driven Gear
- Kick Axle, Shift Shaft and Primary Drive Gear
- YPVS Govenor
- Water Pump
- CDI Magneto
- Engine Removal
- Crankcase and Crankshaft
- Transmission, Shift Cam and Shift Fork
- Chapter 5 Chassis
- Chapter 6 Electrical
- Chapter 7 Tuning
4-32
CLUTCH AND PRIMARY DRIVEN GEAR
ENG
EC493000
REMOVAL POINTS
EC483211
Clutch boss
1. Remove:
9
Nut 1
9
Lock washer 2
9
Clutch boss 3
NOTE:
Straighten the lock washer tab and use the
clutch holding tool 4, 5 to hold the clutch boss.
å For USA and CDN
∫ Except for USA and CDN
EC494000
INSPECTION
EC484100
Clutch housing and boss
1. Inspect:
9
Clutch housing 1
Cracks/Wear/Damage → Replace.
9
Clutch boss 2
Scoring/Wear/Damage → Replace.
EC484201
Primary driven gear
1. Check:
9
Circumferential play
Free play exists → Replace.
9
Gear teeth a
Wear/ Damage → Replace.
EC484400
Clutch spring
1. Measure:
9
Clutch spring free length a
Out of specification → Replace springs as
a set.
Clutch holding tool:
YM-91042................................
4
90890-04086............................
5
Clutch spring free length:
Standard <Limit>
41.2 mm 39.2 mm
(1.622 in) (1.543 in)
å
∫
å
1C3-28199-10 121 04.5.17, 9:22:41 PM