Yamaha BEARTRACKER YFM250XC, Service Manual

Page: 28 / 398

MAINTENANCE SPECIFICATIONS
SPEC
2 - 4
MAINTENANCE SPECIFICATIONS
ENGINE
Item Standard Limit
Cylinder head:
Warp limit ---- 0.10 mm
(0.004 in)
Measuring point Lines indicate straight edge
measurement.
Cylinder:
Bore size 70.97 ~ 71.02 mm (2.794 ~ 2.796 in) 71.10 mm
(2.799 in)
Measuring point 40 mm (1.6 in) ----
Camshaft:
Drive method Chain drive (Left) ----
Cam cap inside diameter 25.000 ~ 25.033 mm
(0.9843 ~ 0.9855 in)
----
Camshaft outside diameter 24.96 ~ 24.98 mm
(0.9827 ~ 0.9835 in)
----
Shaft-to-cap clearance 0.020 ~ 0.073 mm
(0.0008 ~ 0.0029 in)
----
Cam dimensions
Intake “A” 36.537 ~ 36.637 mm
(1.438 ~ 1.442 in) 36.437 mm
(1.435 in)
“B” 30.131 ~ 30.231 mm
(1.186 ~ 1.190 in) 30.031 mm
(1.182 in)
“C” 6.527 ~ 6.647 mm
(0.257 ~ 0.262 in) ----
Exhaust “A” 36.582 ~ 36.682 mm
(1.440 ~ 1.444 in) 36.482 mm
(1.436 in)
“B” 30.252 ~ 30.352 mm
(1.191 ~ 1.195 in) 30.152 mm
(1.187 in)
*
*
C
A
B
2