Yamaha Rhino 450 YXR45FAV Service Manual page 80

ADJUSTING THE VALVE CLEARANCE
1
2
7. Check:
• valve clearance
Out of specification → Adjust.
Valve clearance (cold)
Intake
0.06 ~ 0.10 mm
(0.0024 ~ 0.0039 in)
Exhaust
0.16 ~ 0.20 mm
(0.0063 ~ 0.0079 in)
M MMM M MMM M M MMM M
a. Turn the crankshaft counterclockwise with a
wrench.
b. Align the "T" mark 1 on the rotor with the
stationary pointer 2 on the A.C. magneto
cover. When the "T" mark is aligned with the
stationary pointer, the piston is at the Top
Dead Center (TDC).
NOTE:
• When the piston is at the Top Dead Center
(TDC) on the compression stroke, there
should be clearance between the valve stem
tips and their respective valve adjusting
screws.
• If there is no clearance, rotate the crankshaft
counterclockwise one turn.
c. Measure the valve clearance using a thick-
ness gauge 3.
L LLL L LLL L L LLL L
8. Adjust:
• valve clearance
M MMM M MMM M M MMM M
a. Loosen the locknut 1.
b. Insert a thickness gauge 2 between the
adjusting screw end and the valve end.
c. Turn the adjusting screw 3 clockwise or
counterclockwise with the tappet adjusting
tool 4 until the proper clearance is
obtained.
Valve adjuster 3 mm & 4 mm
P/N. YM-08035-A
Tappet adjusting tool
P/N. 90890-01311
3 - 4
CHK
ADJ
M MMM M M MMM M M MMM M MMM
L LLL L L LLL L L LLL L LLL
M MMM M M MMM M M MMM M MMM