Yamaha 2008 Raptor 250, Service Manual

Page: 129 / 311

ENG
4-13
a. Turn the Pickup coil rotor counterclockwise.
b. Align the “I” mark
on the Pickup coil rotor
with the stationary pointer on the crank-
case cover.
c. Remove the wire from the timing chain.
d. Install the timing chain onto the camshaft
sprocket, and then install the camshaft
sprocket onto the camshaft.
NOTE: NOTE:
• When installing the camshaft sprocket, be
sure to keep the timing chain as tight as pos-
sible on the exhaust side.
• Align the pin on the camshaft with the slot
in the camshaft sprocket.
CAUTION:
Do not turn the crankshaft when installing
the camshaft(s) to avoid damage or
improper valve timing.
e. Align the “I” mark on the camshaft
sprocket with the stationary pointer on
the cylinder head.
f. While holding the camshaft, temporarily
tighten the camshaft sprocket bolts.
5. Install:
• Timing chain tensioner
a. While lightly pressing the timing chain ten-
sioner rod by hand, turn the tensioner rod
fully clockwise with a thin screwdriver
.
b. With the timing chain tensioner rod turned
all the way into the timing chain tensioner
housing (with the thin screwdriver still
installed), install the new gasket and the
timing chain tensioner
onto the body cyl-
inder.
c. Tighten the timing chain tensioner bolts
to the specified torque.
d. Remove the screwdriver, make sure that
the timing chain tensioner rod releases, and
then tighten the cap bolt
to the specified
torque.
10 Nm (1.0 m•kg, 7.4 ft•lb)
CYLINDER HEAD