Yamaha WR250F(N), Руководство по эксплуатации для владельца

Страница: 316 / 686

4 - 25
ENG
CAMSHAFTS
Timing chain tensioner
1. Check:
●
While pressing the tensioner rod lightly
with fingers, use a thin screwdriver
1
and wind the tensioner rod up fully
clockwise.
●
When releasing the screwdriver by
pressing lightly with fingers, make sure
that the tensioner rod will come out
smoothly.
●
If not, replace the tensioner assembly.
ASSEMBLY AND INSTALLATION
Camshaft
1. Install:
●
Exhaust camshaft
1
●
Intake camshaft 2
Installation steps:
●
Turn the crankshaft counterclockwise with
a wrench.
NOTE:
Squeezing the decompression lever allows
the crankshaft to be turned easily.
●
Align the T.D.C. mark
a
on the rotor with
the align mark
b
on the crankcase cover
when piston is at T.D.C. on compression
stroke.
●
Fit the timing chain
3
onto both camshaft
sprockets and install the camshafts on the
cylinder head.
NOTE:
The camshafts should be installed onto the
cylinder head so that the punch mark
c
on
the exhaust camshaft and the punch mark
d
on the intake camshaft must align with
the cylinder head surface, as shown in the
illustration.