Raider-Classic 150 (Oil-cooled&Internal Gearbox): Service Manual (single/ double-seat) EEC Version;3.0 Feb..2005
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15 Valve Spring Holder, Outer 16 Guide Pipe, Valve
17 Spark Plug 18 Intake Port
19 Cylinder 20 Washer
21Chain Adjustor
3.4.1 General Introduction
The four-stroke engine completes its four strokes with one piston stroke. The four strokes: Intake
stroke, Compression stroke, Expansion stroke, and Exhaust stroke.
3.4.2 Valve Clearance Adjustment
The valve clearance is an important technical parameter. Make sure that the valve can closely
tightened under any conditions, especially when the engine is overheated; there must be certain
clearance kept when the valve is in the cold condition. This clearance is called the valve clearance.
When the engine is running, the valve clearance should be neither too big, nor too small. So the
valve clearance adjustment is an important procedure in the valve maintenance.
a) Remove the cylinder head cover.
b) Turn the cooling fan clockwise until the mark of the timing
drive sprocket on the camshaft is at the top dead center, and
the "T" symbol (or other mark) of the magneto flywheel aligns
with the crankcase mark.
c) When adjusting, loosen the lock nuts; adjust the bolts with a
valve-adjusting wrench; if turning clockwise, the valve
clearance decreases; and if turning counterclockwise, the valve
clearance increases.
d) Then, put a feeler gauge with the specific size between the
valve and rocker to check for correct clearance.
e) Take out the feeler gauge; tighten the lock nuts, and then inspect the valve clearance again.
Inspection and adjustment must be done in cold
conditions (below 35°C).
The crankshaft should co-rotate; otherwise the exhaust
port may not be adjusted.
Summary of Contents for Raider-Classic 150
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