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1.
Remove all four tappet covers and the
generator cover.
2.
Turn the crankshaft to align the rotor
mark with the "T" mark on the stator.
This places the pistons at the top dead
3.
center and the valve clearance should be
checked and adjusted at the top dead
center on the compression stroke by
observing when the valve adjusters have
clearance.
4.
Use a feeler gauge to determine the
clearance.
Exhaust valve clearance (cold):
Intake valve clearance (cold):
5. Loosen the valve adjuster lock nut. Turn
the adjuster in or out to obtain the
correct clearance. Hold the adjuster to
prevent it from moving and throughly
tighten the lock nut.
6.
Recheck the clearance after tightening.
G. Crankcase ventilation system
1. Check ventilation hose for cracks or
damage.
2. Replace it if necessary.
2. Fuel pipe
H. Exhaust system
1.
Check for leakage from exhaust joints and
retighten joint bolts and nuts.
2.
Replace gaskets if necessary.
2-4. CHASSIS
A. Fuel petcock cleaning
1. Turn the petcock lever to the "ON" or
"RES" position. Remove the fuel pipe.
2.
Remove the drain cover and clean it with
solvent.
1 "RES" position
2. Drain cover
B. Fuel petcock disassembly
If the fuel petcock is leaking or excessively
contaminated, it should be removed from the
fuel tank and inspected.
1.
Remove fuel tank and position it so that
fuel will not spill when the petcock is
removed.
2.
Remove petcock and inspect filter screen.
Clean or replace filter if seriously con-
taminated.
3.
Remove screws on front and rear of pet-
cock and remove plate, gaskets, lever and
diaphragm.
Inspect all components and replace any
4.
that are damaged. If the diaphragm is in
any way damaged, or the petcock body
gasket surfaces scratched or corroded, the
petcock assembly must be replaced. If
there is abrasive damage to any com-
ponent, the fuel tank must be drained and
flushed.
Reassemble petcock and install on fuel
5.
tank.
C. Fuel hose
1.
Check fuel hose for cracks or damage.
2. Replace it if necessary.
-9-
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