Yamaha YFM400FAR, Service Manual

Page: 379 / 481

– 5 –
SPEC
MAINTENANCE SPECIFICATIONS
ENGINE
Item Standard Limit
Cylinder head:
Warp limit ---- 0.03 mm
(0.0012 in)
Cylinder:
Bore size 82.970 ~ 83.020 mm
(3.2665 ~ 3.2685 in) 83.100 mm
(3.2720 in)
Taper limit ---- 0.05 mm
(0.0016 in)
Out of round limit ---- 0.01 mm
(0.0004 in)
Camshaft:
Drive method Chain drive (left) ----
Cam dimensions
Intake “A” 40.62 ~ 40.72 mm
(1.5992 ~ 1.6031 in) 40.52 mm
(1.5953 in)
“B” 32.18 ~ 32.28 mm
(1.2669 ~ 1.2709 in) 32.08 mm
(1.2630 in)
Exhaust “A” 40.62 ~ 40.72 mm
(1.5992 ~ 1.6031 in) 40.52 mm
(1.5953 in)
“B” 32.18 ~ 32.28 mm
(1.2669 ~ 1.2709 in) 32.08 mm
(1.2630 in)
Camshaft runout limit ---- 0.03 mm
(0.0012 in)
A
B
MAINTENANCE SPECIFICATIONS