wheel torque YAMAHA WR 250F 2001 Owners Manual

GEN
INFO
1 - 18
TORQUE-CHECK POINTS
TORQUE-CHECK POINTS
Frame construction
Combined seat and fuel tank
Exhaust system
Engine mounting
Steering Steering stem to
handlebar
Suspension Front Steering stem to front
fork
Rear For link type
Rear Installation of rear
shock absorber
Rear Installation of swing-
arm
Wheel Installation of wheel Front
Rear
Brake Front
Rear
Fuel systemFrame to rear frame
Fuel tank to frame
Silencer to rear frame
Frame to engine
Steering stem to frame
Steering stem to upper bracket
Upper bracket to handlebar
Front fork to upper bracket
Front fork to lower bracket
Assembly of links
Link to frame
Link to rear shock absorber
Link to swingarm
Rear shock absorber to frame
Tightening of pivot shaft
Tightening of wheel axle
Tightening of axle holder
Tightening of wheel axle
Wheel to rear wheel sprocket
Brake caliper to front fork
Brake disc to wheel
Tightening of union bolt
Brake master cylinder to handlebar
Tightening of bleed screw
Brake disc to wheel
Tightening of union bolt
Brake master cylinder to frame
Tightening of bleed screw
Fuel tank to fuel cock
NOTE:
Concerning the tightening torque, refer to
“MAINTENANCE SPECIFICATIONS” section
in the CHAPTER 2.

SPEC
2 - 11
MAINTENANCE SPECIFICATIONS
NOTE:
- marked portion shall be checked for torque tightening after break-in or before each race. Silencer M8 ´ 1.25 2 35 3.5 25
Silencer clamp M8 ´ 1.25 1 20 2.0 14
Spark arrester (for USA) M6 ´ 1.0 3 10 1.0 7.2
Silencer end pipe (for USA) M6 ´ 1.0 1 10 1.0 7.2
Crankcase M6 ´ 1.0 11 12 1.2 8.7
Crankcase bearing stopper M6 ´ 1.0 11 10 1.0 7.2
Crankcase bearing stopper (crankshaft) M6 ´ 1.0 4 10 1.0 7.2
Left crankcase cover M6 ´ 1.0 8 10 1.0 7.2
Right crankcase cover M6 ´ 1.0 8 10 1.0 7.2
Clutch cover M6 ´ 1.0 7 10 1.0 7.2
Crankcase oil drain bolt M10 ´ 1.25 1 20 2.0 14
Drive chain sprocket cover M6 ´ 1.0 2 10 1.0 7.2
Kick shaft ratchet wheel guide M6 ´ 1.0 2 12 1.2 8.7
Kickstarter crank M8 ´ 1.25 1 33 3.3 24
Primary drive gear M18 ´ 1.0 1 75 7.5 54
Clutch spring M6 ´ 1.0 5 8 0.8 5.8
Clutch boss M16 ´ 1.0 1 60 6.0 43
Push lever shaft M6 ´ 1.0 1 10 1.0 7.2
Drive sprocket M18 ´ 1.0 1 75 7.5 54
Drive axle oil seal stopper M6 ´ 1.0 2 10 1.0 7.2
Segment M8 ´ 1.25 1 30 3.0 22
Shift guide M6 ´ 1.0 2 10 1.0 7.2
Stopper lever M6 ´ 1.0 1 10 1.0 7.2 Part to be tightened Thread size Q’tyTightening torque
Nm m·kg ft·lb

SPEC
2 - 14
MAINTENANCE SPECIFICATIONS
NOTE:
1. First, tighten the steering nut approximately 38 Nm (3.8 m • kg, 27 ft • lb) by using the steering
nut wrench, then loosen the steering nut one turn.
2. Retighten the steering nut 7 Nm (0.7 m • kg, 5.1 ft • lb).Part to be tightened Thread size Q’tyTightening torque
Nm m·kg ft·lb
Upper bracket and outer tube M8 ´ 1.25 4 23 2.3 17
Lower bracket and outer tube M8 ´ 1.25 4 20 2.0 14
Upper bracket and steering stem M24 ´ 1.0 1 145 14.5 105
Handlebar holder and upper bracket M8 ´ 1.25 4 28 2.8 20
Steering stem and steering ring nut M28 ´ 1.0 1 Refer to NOTE.
Front fork and front fork cap bolt M48 ´ 1.0 2 30 3.0 22
Front fork and base valve M30 ´ 1.0 2 55 5.5 40
Front fork cap bolt and damper rod M12 ´ 1.25 2 29 2.9 21
Front fork bleed screw and front fork cap bolt M5 ´ 0.8 2 1 0.1 0.7
Front fork and front fork protector M6 ´ 1.0 6 10 1.0 7.2
Meter cable holder and front fork protector M5 ´ 0.8 2 4 0.4 2.9
Front fork and brake hose guide M5 ´ 0.8 2 4 0.4 2.9
Front fork and brake hose holder M6 ´ 1.0 2 10 1.0 7.2
Front fork and brake hose cover (M8) M8 ´ 1.25 1 16 1.6 11
(M6) M6 ´ 1.0 1 7 0.7 5.1
Throttle grip cap M5 ´ 0.8 2 4 0.4 2.9
Front brake master cylinder M6 ´ 1.0 2 9 0.9 6.5
Brake lever mounting bolt M6 ´ 1.0 1 6 0.6 4.3
Brake lever mounting nut M6 ´ 1.0 1 6 0.6 4.3
Brake lever position locknut M6 ´ 1.0 1 5 0.5 3.6
Front brake hose guide M5 ´ 0.8 2 4 0.4 2.9
Clutch lever holder M5 ´ 0.8 2 4 0.4 2.9
Clutch lever mounting bolt M6 ´ 1.0 1 2 0.2 1.4
Decompression lever holder M5 ´ 0.8 2 4 0.4 2.9
Light switch M4 ´ 0.7 2 2 0.2 1.4
Front brake master cylinder cap M4 ´ 0.7 2 2 0.2 1.4
Front brake hose union bolt M10 ´ 1.25 2 30 3.0 22
Front brake caliper M8 ´ 1.25 2 23 2.3 17
Pad pin plug M10 ´ 1.0 2 3 0.3 2.2
Front brake caliper and pad pin M10 ´ 1.0 1 18 1.8 13
Rear brake caliper and pad pin M10 ´ 1.0 1 18 1.8 13
Brake caliper and bleed screw M8 ´ 1.25 2 6 0.6 4.3
Front wheel axle and axle nut M16 ´ 1.5 1 105 10.5 75
Front wheel axle holder M8 ´ 1.25 4 23 2.3 17
Front brake disc M6 ´ 1.0 6 12 1.2 8.7

SPEC
2 - 15
MAINTENANCE SPECIFICATIONS
Part to be tightened Thread size Q’tyTightening torque
Nm m·kg ft·lb
Rear brake disc M6 ´ 1.0 6 14 1.4 10
Brake pedal M8 ´ 1.25 1 26 2.6 19
Rear brake master cylinder M6 ´ 1.0 2 10 1.0 7.2
Rear brake reservoir tank M6 ´ 1.0 1 10 1.0 7.2
Rear brake reservoir tank cap M4 ´ 0.7 2 2 0.2 1.4
Rear brake hose union bolt M10 ´ 1.25 2 30 3.0 2.2
Rear wheel axle and axle nut M20 ´ 1.5 1 125 12.5 90
Nipple (spoke) — 72 3 0.3 2.2
Rear wheel sprocket M8 ´ 1.25 6 42 4.2 30
Rear brake disc cover M6 ´ 1.0 2 7 0.7 5.1
Rear brake caliper protector M6 ´ 1.0 2 7 0.7 5.1
Engine mounting:
Engine and engine bracket (front) M10 ´ 1.25 1 69 6.9 50
Engine and frame (lower) M10 ´ 1.25 1 69 6.9 50
Engine bracket and frame M8 ´ 1.25 6 34 3.4 24
Engine and engine bracket (upper) M10 ´ 1.25 1 55 5.5 40
Lower engine guard M6 ´ 1.0 3 10 1.0 7.2
Left engine guard M8 ´ 1.25 2 23 2.3 17
Right engine guard M8 ´ 1.25 2 10 1.0 7.2
Pivot shaft and nut M16 ´ 1.5 1 85 8.5 61
Relay arm and swingarm M14 ´ 1.5 1 80 8.0 58
Relay arm and connecting rod M14 ´ 1.5 1 80 8.0 58
Connecting rod and frame M14 ´ 1.5 1 80 8.0 58
Rear shock absorber and frame M10 ´ 1.25 1 56 5.6 40
Rear shock absorber and relay arm M10 ´ 1.25 1 53 5.3 38
Rear frame M8 ´ 1.25 3 29 2.9 21
Swingarm and brake hose holder M5 ´ — 4 4 0.4 2.9
Drive chain tensioner M8 ´ 1.25 2 19 1.9 13
Drive chain case M6 ´ 1.0 3 7 0.7 5.1
Seal guard and swingarm M5 ´ 0.8 4 6 0.6 4.3
Fuel tank M6 ´ 1.0 2 10 1.0 7.2
Fuel cock M6 ´ 1.0 2 7 0.7 5.1
Seat set bracket and fuel tank M6 ´ 1.0 1 7 0.7 5.1
Hooking screw (fitting band) and fuel tank M6 ´ 1.0 1 7 0.7 5.1
Radiator cover M6 ´ 1.0 6 4 0.4 2.9
Front fender M6 ´ 1.0 4 7 0.7 5.1
Rear fender M6 ´ 1.0 4 7 0.7 5.1
Side cover M6 ´ 1.0 2 7 0.7 5.1
Seat M8 ´ 1.25 2 23 2.3 17

5 - 40
CHASFRONT FORK
4. Tighten:
lPinch bolt (upper bracket) 1
lPinch bolt (lower bracket) 2
CAUTION:
Tighten the lower bracket to specified
torque. If torqued too much, it may cause
the front fork to malfunction.
5. Install:
lBrake hose holder 1
lBrake caliper 2
lBolt (brake caliper) 3
NOTE:
Fit the brake hose holder cut a over the pro-
jection b on the front fork and clamp the brake
hose.
6. Install:
lBrake hose holder 1
lBolt (brake hose holder) 2
lProtector 3
lBolt (protector) 4
NOTE:
When installing the brake hose holder, pass
the brake hose 5 in front of the axle boss a,
then fit it into the hose groove b so that the
brake hose does not contact the nut (wheel
axle).
T R..23 Nm (2.3 m · kg, 17 ft · lb)
T R..20 Nm (2.0 m · kg, 14 ft · lb)
T R..23 Nm (2.3 m · kg, 17 ft · lb)
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
7. Adjust:
lRebound damping force
NOTE:
Turn in the damping adjuster 1 finger-tight
and then turn out to the originally set position.