Tires And Tubes; Front Forks - Yamaha JT1 Series Service Manual

CHASSIS·Tires
and Tubes, Front Forks
2)Checking
Check the ·1ock washer and hexagonal bolt for
breakage and damage. If the lock washer is not
bent. over the hexagon bolt head. or is broken, or
if the bolt is loose, the sprocket can come loose.
Make sure that both lock washers and the mounting
bolts are tight
Drive Chain Adjustment
To adiust drive chain, proceed as follows:
1. Loosen rear axle securing nut.
Fig 4-3-3
2, With rider in position on machine, both wheels on ground, set axle adjusters until there is 3/4 to 1 inch slack in the
drive chain at the bottom of the chain at a point midway between the drive and driven axles.
3. Turn adjusting nuts in or out to obtain correct free ploy, and at the some time insure that both ends of axle ore posi•
tioned evenly. This con be checked by utilizing the morks on end of swing orms ond notch cut into top of adjusting
bolt.
Tighten the rear axle securing nut.
Axle Nut Torque: 4.5 - 5.0 kg-m (400 - 440 in.-lbs,)
4-4
Tires and Tubes
l) Normal tire pressure
Though tire pressure is the rider's choice, the standard tire pressure is as follows:
Front .. , ••.• , 22.4 \bs./in
2
(1.6 kg./cm
2 )
Rear ...••••. 28.0 lbs./in
2
(2.0 kg./cm
2
)
· When the tire pressure is reduced below the specified amount because of some reason, the tire may slip around the rim
and destroy the valve stem (unless rim locks are installed).
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