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
5-31
CHAS
FRONT FORK
Base valve
1. Inspect:
9
Base valve 1
Wear/Damage→Replace.
Contamination→Clean.
9
O-ring 2
Wear/Damage→Replace.
9
Bush 3
Wear/Damage→Replace base valve.
9
Spring 4
Damage/Fatigue→Replace base valve.
9
Air bleed screw 5
Wear/Damage→Replace base valve.
EC554400
Fork spring
1. Measure:
9
Fork spring free length a
Out of specification→Replace.
EC554502
Inner tube
1. Inspect:
9
Inner tube surface a
Score marks→Repair or replace.
Use #1,000 grit wet sandpaper.
Damaged oil lock piece→Replace.
9
Inner tube bends
Out of specification→Replace.
Use the dial gauge 1.
NOTE:
The bending value is shown by one half of the
dial gauge reading.
w
Do not attempt to straighten a bent inner
tube as this may dangerously weaken the
tube.
Standard <Limit>
465 mm 460 mm
(18.3 in) (18.1 in)
Fork spring free length:
Inner tube bending limit:
0.2 mm (0.008 in)
1C3-28199-10 194 04.5.17, 9:27:09 PM