Engine Specifications - Yamaha YFM250RX 2008 Service Manual

EBS01002

ENGINE SPECIFICATIONS

Item
Cylinder head
Volume
Warp limit
Cylinder
Bore size
Camshaft
Drive method
Camshaft lobe dimensions
Intake
Exhaust
Camshaft runout limit
Timing chain
Timing chain type/No. of links
Timing chain adjustment method
Rocker arm/rocker arm shaft
Rocker arm inside diameter
Rocker arm shaft outside diameter
Rocker-arm-to-rocker-arm-shaft
clearance
ENGINE SPECIFICATIONS
20.50 ~ 21.50 cm
• • •
74.000 ~ 74.016 mm (2.9134 ~ 2.9140 in) 74.100 mm
Chain drive (Right)
"A" 36.890 ~ 36.990 mm (1.4524 ~ 1.4563 in) 36.790 mm
"B" 30.111 ~ 30.211 mm (1.1855 ~ 1.1894 in) 30.011 mm
"A" 36.891 ~ 36.991 mm (1.4524 ~ 1.4563 in) 36.791 mm
"B" 30.092 ~ 30.192 mm (1.1847 ~ 1.1887 in) 29.992 mm
• • •
DID SCR-0404 SV/104
Automatic
12.000 ~ 12.018 mm (0.4724 ~ 0.4731 in) 12.036 mm
11.981 ~ 11.991 mm (0.4717 ~ 0.4721 in) 11.950 mm
0.009 ~ 0.037 mm (0.0004 ~ 0.0015 in)
2-4
SPEC
Standard
3
(1.25 ~ 1.31 cu.in)
Limit
• • •
0.05 mm
(0.0020 in)
(2.9173 in)
• • •
(1.4484 in)
(1.1815 in)
(1.4485 in)
(1.1808 in)
0.03 mm
(0.0012 in)
• • •
• • •
(0.4739 in)
(0.4705 in)
• • •