torque YAMAHA YFM250R-W 2009 User Guide

8-30
8
TIPA rod can be obtained at a Yamaha dealer to makethis adjustment.
4. Shift the transmission into neutral.
5. To tighten the drive chain, push the ATV back-
ward. To loosen the drive chain, push the ATV
forward.
NOTICEECB00541Improper drive chain slack will overload the en-
gine as well as other vital parts of the ATV and
can lead to drive chain slippage or breakage.
To prevent this from occurring, keep the drivechain slack within the specified limits.
6. Pull the rod out, and then tighten the rear axle
pinch bolts to the specified torque in the order
shown.
1. Rear wheel axle pinch bolt
2. Rod
3. Drive chain tensioner
4. Hole
4 3
2
11
Tightening torque:
Rear axle pinch bolt:
21 Nm (2.1 m·kgf, 15.2 ft·lbf)
12
5634
78
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8-31
8 7. Check that the clearance between the speed
sensor and the speed sensor rotor is 3–5 mm
(0.12–0.19 in). If the clearance is out of spec-
ification, adjust the speed sensor position as
follows.
TIPThis specified clearance is necessary for thespeedometer to indicate an accurate reading.
8. Loosen the speed sensor bracket bolt.9. Adjust the position of the speed sensor so that
the clearance between the sensor and the
speed sensor rotor is 3–5 mm (0.12–0.19 in).
10. Tighten the bolt to the specified torque.
EBU24880Lubricating the drive chain The drive chain must be cleaned and lubricated at
the intervals specified in the periodic maintenance
and lubrication chart, otherwise it will quickly wear
out, especially when riding in dusty or wet areas.
Service the drive chain as follows.
1. Speed sensor rotor
2. Speed sensor
3. Speed sensor bracket bolt
4. Clearance
3 2
4
1
Tightening torque:
Speed sensor bracket bolt:
13 Nm (1.3 m·kgf, 9.4 ft·lbf)
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8-42
8Rear
3. Elevate the ATV and place a suitable stand
under the frame.
4. Remove the nuts from the wheel.
5. Remove the wheel.
EBU27481Installing a wheel 1. Place the ATV on a level surface.
2. Install the wheel and the nuts.TIPWhen installing the wheel, make sure its arrow
mark points toward the rotating direction of thewheel.3. Lower the ATV to the ground.
4. Tighten the wheel nuts to the specified
torques.1. Nut
1. Arrow markTightening torques:
Fro nt wh ee l nu t:
45 Nm (4.5 m·kgf, 32 ft·lbf)
Rear wheel nut:
45 Nm (4.5 m·kgf, 32 ft·lbf)
U33B70E0.book Page 42 Wednesday, June 11, 2008 1:38 PM