Removal - Yamaha RS90K Service Manual

b
a
1
1
2
3
2
5-16
CAMSHAFTS

REMOVAL

1. Remove:
• Timing accessing screw
• Crankshaft end accessing screw
2. Align:
• "I" mark a on the A.C. magneto rotor
(with the stationary pointer b on the A.C.
magneto cover)
NOTE:
• Turn the crankshaft clockwise.
• When piston #3 is at TDC on the compression
stroke, align the "I" mark a on the A.C. magneto
rotor with the stationary pointer b on the A.C.
magneto cover.
• TDC on the compression stroke can be found
when the camshaft lobes are turned away from
each other.
3. Loosen:
• Timing chain tensioner cap bolt 1
• Gasket
4. Remove:
• Timing chain tensioner 2
• Gasket
5. Remove:
• Camshaft caps
• Dowel pins
CAUTION:
To prevent damage to the cylinder head, cam-
shafts or camshaft caps, loosen the camshaft
cap bolts in stages and in a crisscross pattern,
working from the outside in.
6. Remove:
• Intake camshaft 1
(with camshaft sprocket)
• Exhaust camshaft 2
(with camshaft sprocket)
NOTE:
To prevent the timing chain from falling into the
crankcase, fasten it with a wire 3.
ENG