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
4-63
ENG
CRANKCASE AND CRANKSHAFT
EC4N3302
Crankshaft
1. Remove:
9
Crankshaft 1
Use the crankcase separating tool 2.
NOTE:
Make appropriate bolts 3 as shown available by
yourself and attach the tool with them.
cC
Do not use a hammer to drive out the
crankshaft.
EC4N3401
Crankshaft bearing
1. Remove:
9
Bearing 1
NOTE:
9
Remove the bearing from the crankcase by
pressing its inner race as shown in å.
9
If the bearing is removed together with the
crankshaft, remove the bearing using a general
bearing puller 2 as shown in ∫.
9
Do not use the removed bearing.
EC4N4000
INSPECTION
EC4N4101
Crankcase
1. Inspect:
9
Contacting surface a
Scratches → Replace.
9
Engine mounting boss b, crankcase
Cracks/Damage → Replace.
Crankcase separating tool:
YU-1135-A/90890-01135
1C3-28199-10 152 04.5.17, 9:24:17 PM