Yamaha WR250R Service Manual page 187

d. Unlock the camshaft chain tensioner by turn-
ing the crankshaft counterclockwise, and ten-
sion the timing chain.
LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL
6. Turn:
Crankshaft
G
(several turns counterclockwise)
7. Check:
The TDC mark of rotor, and the mark of
G
crankshaft case cover
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
a. Turn the crankshaft counterclockwise.
b. When the piston is in the compression pro-
cess, align TDC mark "a" of the rotor with
mark "b" of crankshaft case cover.
NOTE:
You can check the TDC in compression process
when the camshaft robes face outward.
Punch mark on the camshaft
G
Check the matching of stamp line "c" of the
camshaft punch mark timing chain sprocket
and the cylinder head end.
Out of alignment → Reinstall.
Refer to the installation steps above.
c
LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL
8. Measure:
Valve clearance
G
Out of specification → Adjust.
b
a
c
5-13
Refer to "ADJUSTING THE VALVE CLEAR-
ANCE" on page 3-4.
CAMSHAFT