Yamaha SRX440 1980 Service Manual page 11

1980 SRX440
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1\10 I E:
For thermostat inspection. refer to 3-5
thermostat.
2. Remove the intake manifold.
3. Remove the exhaust pipe assembly.
4. Remove the cylinder head holding nuts.
cylinder head. gasket and a-ring.
NOTE: - - - - - - - - - - - - -
Loosen spark plugs before removing cylinder
head.
5. Remove the cylinder and cylinder base
gasket.
6. Remove piston pin clip from piston.
NOTE: - - - - - - - - - - - - -
Before removing the piston pin clip. cover
the crankcase with a clean rag to prevent the
clip from accidentally falling into the
crankcase.
7. Push piston pin from opposite side. then
pull out. Protect pin with rag.
N O T E : - - - - - - - - - - - - -
Before moving piston pin. deburr clip groove
and pin hole area.
2·5
8. Remove engine bracket.
9. Remove crankcase holding bolts.. Each
bolt position is numbered, Start with the
largest number for disassembly. Loosen
each bolt 1/4 turns and proceed to the
next.
10. Split crankcase by lightly striking the
upper and lower crankcases.
11. Remove crankshaft by tapping the shaft
with your hands.
2-2. INSPECTION. REASSEMBLY AND
ADJUSTMENT
A. Engine components
1. Crankcase
a. Thoroughly wash the case halves in
mild solvent.
b. Clean gasket mating surfaces and
crankcase mating surfaces thoroughly.
c. Visually inspect case halves for any
cracks. road damage. etc.
d. Check oil delivery passages in transfer
ports for signs of blockage.
2. Bearing and oil seal inspection
a. After cleaning and lubricating bearings.
rotate outer race with a finger. If rough
spots are noticed. replace the bearing.