Yamaha YZ450F, Owner'S Service Manual

Page: 75 / 650

SPEC
2 - 4
MAINTENANCE SPECIFICATIONS
ENGINE
Item Standard Limit
Cylinder head:
Warp limit ---- 0.05 mm
(0.002 in)
Cylinder:
Bore size 95.00 ~ 95.01 mm
(3.7402 ~ 3.7406 in) ----
Out of round limit ---- 0.05 mm
(0.002 in)
Camshaft:
Drive method Chain drive (Left) ----
Camshaft cap inside diameter 22.000 ~ 22.021 mm
(0.8661 ~ 0.8670 in) ----
Camshaft journal diameter 21.959 ~ 21.972 mm
(0.8645 ~ 0.8650 in) ----
Shaft-to-cap clearance 0.028 ~ 0.062 mm
(0.0011 ~ 0.0024 in) 0.08 mm
(0.003 in)
Cam dimensions
Intake “A” 31.200 ~ 31.300 mm
(1.2283 ~ 1.2323 in) 31.100 mm
(1.2244 in)
“B” 22.550 ~ 22.650 mm
(0.8878 ~ 0.8917 in) 22.450 mm
(0.8839 in)
Exhaust “A” 30.950 ~ 31.050 mm
(1.2185 ~ 1.2224 in) 30.850 mm
(1.2146 in)
“B” 22.494 ~ 22.594 mm
(0.8856 ~ 0.8895 in) 22.394 mm
(0.8817 in)
Camshaft runout limit ---- 0.03 mm
(0.0012 in)
A
B
MAINTENANCE SPECIFICATIONS