Yamaha F100A, Service Manual

Page: 84 / 463

3-11
INSP
ADJ
E
POWER UNIT
Measurement steps:
●
Turn the flywheel magneto clockwise
until cylinder #1’s piston is at TDC.
●
Measure the intake valve clearance for
cylinders #1and #2.
●
Measure the exhaust valve clearance
for cylinders #1 and #3.
●
Turn the flywheel magneto 360˚ clock-
wise.
●
Measure the intake valve clearance for
cylinders #3 and #4.
●
Measure the exhaust valve clearance
for cylinders #2 and #4.
IN EX
#1
#2
#3
#4
8. Loosen:
●
Timing belt tensioner
9. Remove:
●
Timing belt
●
Driven sprockets
●
Camshaft caps
●
Camshafts
Refer to “POWER UNIT” in chapter 5.
10. Adjust:
●
Valve clearance
NOTE:
●
Do not mix the valve train parts (i.e., valve
pads, camshaft caps, camshafts). Keep
them organized in their proper groups
(e.g., cylinder #1 parts kept together).
●
Install the removed parts in their original
positions. If valve train parts are installed
in the wrong position, proper valve
adjustments are impossible.