Yamaha YZF-R1S Service Manual - Eng
5-14
CAMSHAFT
ENG
NOTE:
CAUTION:
EAS00198
REMOVING THE CAMSHAFTS
1. Remove:
Spickup rotor cover
Refer to “CRANKSHAFT POSITION SEN-
SOR AND PICKUP ROTOR”.
2. Align:
S“T” mark
a
on the pickup rotor
(with the crankcase mating surface
b
)
a. Turn the crankshaft clockwise.
b. When piston #1 is at TDC on the compres-
sion stroke, align the “T” mark
a
on the pick-
up rotor with the crankcase mating surface
b
.
TDC on the compression stroke can be found
when the camshaft lobes are turned away from
each other.
3. Loosen:
Scamshaft sprocket bolts
1
Camshaft wrench
90890-04143
4. Remove:
Stiming chain tensioner
1
SO-ring
5. Remove:
Scamshaft caps
1
Sdowel pins
To prevent damage to the cylinder head,
camshafts or camshaft caps, loosen the
camshaft cap bolts in stages and in a criss-
cross pattern, working from the outside in.