Front Wheel; Rear Wheel; Fuel Cock - Yamaha XZ550RJ 1982 Service Manual

Front wheel

1. Raise the front end of the motorcycle, and
spin the wheel by hand. Touch the axle or
front fender while spinning the wheel. If you
feel any excessive vibration, the bearings
are rough and should be replaced.

Rear wheel

1. Remove the rear wheel, and check the bear-
ing movement with your finger. Replace the
bearings if they are rough or worn.

Fuel cock

If either fuel cock is leaking or is excessively con-
taminated, it should be removed from the fuel tank
and inspected.
1. Remove the fuel tank and position it so that
fuel will not spill when the fuel cock is re-
moved.
2. Remove the fuel cock and inspect the filter
screen. Replace the filter if it is seriously
contaminated.
3. Remove the screws on the front and rear of
the fuel cock; remove the plate, gaskets,
lever, and diaphragm.
4. Inspect all components, and replace any that
are damaged. If the diaphragm is damaged
in any way or if the fuel cock gasket surfaces
are scratched or corroded, the fuel cock as-
sembly must be replaced. If there is abrasive
damage to any components, the fuel tank
must be drained and flushed.
5. Reassemble the fuel cock, and install it on
the fuel tank.
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