Compression Pressure Check; Steering Sleeve Bearings - Gilera Nordwest Workshop Manual

COMPRESSION PRESSURE CHECK

Warm up the engine.
Stop the engine and remove the spark plug.
Remove the kick starter decompressor on the cylinder head.
Connect the pressure gauge to the spark plug hole.
Turn throttle fully open.
Turn engine over several times with the electric starter until the gauge
measures the highest value.
Check that there are no leakages at the pressure gauge connection point.
Low compression may be caused by:
Incorrect valve clearance
Valves are not pressure tight
Head gasket leak
Worn piston or cylinder parts
Incorrect adjustment of the decompressor
High compression may be caused by:
Excessive carbon deposits in the combustion chamber or on the crown of
ppiston.

STEERING SLEEVE BEARINGS

Place the motorcycle on a support so as to raise the front wheel from the
ground.
Check that the handlebar turns freely from one side to the other.
If the handlebar does not turn freely, it locks, or turns with stiff movements,
especially when the wheel is on an axis with the vehicle, check the steering
sleeve bearings and replace them if necessary.
Check that the control wires do not interfere with the handlebar rotation.
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