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
2-4
SPEC
MAINTENANCE SPECIFICATIONS
Item Standard Limit
Transmission:
Main axle deflection limit
…
0.01 mm (0.0004 in)
Drive axle deflection limit
…
0.01 mm (0.0004 in)
Shifter:
Shifting type Cam drum and guide bar
…
Guide bar bending limit
…
0.05 mm (0.0020 in)
Kick starter type: Kick and mesh type
…
Kick clip friction force P=0.8~1.2 kg (1.8~2.6 lb)
…
Air filter oil grade (oiled filter):
Foam-air-filter oil or equivalent oil
…
Carburetor: USA, CDN, ZA
EUROPE
AUS, NZ
Type/Manufacturer TMX
χ
38SS ←
/MIKUNI
I.D. mark 1C31 00 1C32 10
…
Main jet (M.J.) #410 #430
…
Jet needle-clip position (J.N.) 6CHY5-80-4 ←
…
Cutaway (C.A.) 4.0 ←
…
Pilot jet (P.J.) #40 ←
…
Pilot air screw (P.A.S.) 2-1/4 ←
…
Valve seat size (V.S.)
ø3.8 mm (0.15 in)
←
…
Starter jet (G.S.) #80 ←
…
Fuel level (F.L.) 9.5~10.5 mm ←
(0.37~0.41 in)
Reed valve:
Thickness* 0.47 mm (0.019 in)
…
Valve stopper height 8.2~8.6 mm (0.323~0.339 in)
…
Valve bending limit
…
0.2 mm (0.008 in)
Cooling:
Radiator core size:
Width 107.8 mm (4.24 in)
…
Height (left) 240 mm (9.45 in)
…
(right) 220 mm (8.66 in)
…
Thickness 32 mm (1.26 in)
…
Radiator cap opening pressure 95~125 kPa
…
(0.95~1.25 kg/cm
2
, 13.5~17.8 psi)
Radiator capacity (total) 0.56 L (0.49 Imp qt, 0.59 US qt)
…
Water pump:
Type Single-suction centrifugal pump
…
1C3-28199-10 36 04.5.17, 9:19:33 PM