Measurement Steps - Yamaha F115A Service Manual

INSP
ADJ
IN
#1
#2
#3
#4
POWER UNIT
EX
3290

Measurement steps

(1) Turn the flywheel magneto clockwise
until cylinder #1's piston is at TDC.
(2) Measure the intake valve clearance for
cylinders #1 and #2.
(3) Measure the exhaust valve clearance
for cylinders #1 and #3.
(4) Turn the flywheel magneto 360˚ clock-
wise.
(5) Measure the intake valve clearance for
cylinders #3 and #4.
(6) Measure the exhaust valve clearance
for cylinders #2 and #4.
8. Loosen:
• Timing belt tensioner
9. Remove:
• Timing belt
• Driven sprockets
• Camshaft caps
• Camshafts
Refer to "POWER UNIT" on page 5-4.
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.
3-14
E