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Maintenance
•
Fit the pin for aligning the intake cam-
shaft with the hole on U-bolt.
•
If it was not possible before adjusting
the valve clearance, check the engine
timing.
Specific tooling
020851Y Camshaft timing pin
•
Remove the two crankshaft and cam-
shaft reference pins.
•
Turn the crankshaft until the gear
screw covered by the head when the
hole on the camshaft gear is aligned
with the hole on the U bolt, is visible.
•
Block crankshaft rotation using one of
the specific tools.
•
Unscrew and remove the camshaft
gear screw.
•
Remove the crankshaft locking tool.
Specific tooling
020850Y Primary gear lock
020848Y Flywheel retainer
Repeat the following operations:
•
move cylinder piston 1 (left rear piston)
to TDC;
•
turn the crankshaft by 450° (one com-
plete turn + 90°) in the direction of en-
gine rotation (direction of travel) to
align the hole on the intake camshaft
with the specific hole on the U bolt This
ensures that all the rear cylinder bank
valve springs are decompressed.
•
Refit the camshaft timing setting pin in
the hole in the U bolt on the rear head,
and refit the crankshaft timing pin from
the clutch side, to check that the timing
MAIN - 76
TUONO V4 R a-PRC ABS
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