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Yamaha RS90RK Service Manual page 58

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VALVE CLEARANCE ADJUSTMENT
È Front
É Degrees that the crankshaft is turned clockwise
Ê Cylinder
Ë Combustion cycle
NOTE:
• Refer to "CAMSHAFTS" in CHAPTER 5.
• When removing the timing chain and camshafts,
NOTE:
• Cover the timing chain opening with a rag to pre-
• Make a note of the position of each valve lifter 1
2-9
For each cylinder, starting with cylinder #3 at TDC,
turn the crankshaft clockwise as specified in the fol-
lowing table.
#2 Cylinder
#1 Cylinder
6. Loosen:
• Timing chain tensioner cap bolt
Refer to "CAMSHAFTS" in chapter 5.
7. Remove:
• Intake camshaft
• Exhaust camshaft
fasten a wire to the timing chain to retrieve it if it
falls into the crankcase.
8. Adjust:
• Valve clearance
Adjustment steps:
• Remove the valve lifter 1 and the valve pad 2
with a valve lapper 3.
vent the valve pad from falling into the crankcase.
and valve pad 2 so that they can be installed in
the correct place.
INSP
ADJ
120°
240°

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