Yamaha YFM250RX 2008 Service Manual page 129

CYLINDER HEAD
a. Turn the Pickup coil rotor counterclockwise.
b. Align the "I" mark
with the stationary pointer
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
in the camshaft sprocket.
CAUTION:
Do not turn the crankshaft when installing
the camshaft(s) to avoid damage
improper valve timing.
e. Align the "I" mark
sprocket with the stationary pointer
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
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
torque.
4-13
ENG
on the Pickup coil rotor
on the crank-
on the camshaft with the slot
on the camshaft
onto the body cyl-
10 Nm (1.0 m•kg, 7.4 ft•lb)
to the specified
or
on
.