2009-2010 Honda CRF450R Crankcase / Crankshaft / Transmission / Balancer Specifications

Crankcase, Crankshaft, Transmission & Balancer Specifications For Your 2009 – 2010 Honda CRF450R Dirt Bike.

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PartStandard (mm)Service Limit (mm)
Crankshaft
– Side Clearance0.30 – 0.550.6
– Radial Clearance0.006 – 0.0180.05
– Runout – R0.03
– Runout – L0.05
Transmission
Gear I.D.
– M428.007 – 28.02828.05
– M528.020 – 28.03328.07
– C230.020 – 30.04130.07
– C328.020 – 28.04128.07
Bushing O.D.
– M4, M5, C327.959 – 27.98027.95
– C229.979 – 30.00029.95
Bushing I.D.
– M525.000 – 25.021 25.04
– C227.000 – 27.02127.04
– C327.952 – 25.00625.02
Gear-to-Bushing Clearance
– M40.027 – 0.0690.11
– M50.040 – 0.0740.12
– C20.020 – 0.0620.12
– C30.040 – 0.0820.12
Mainshaft O.D.
– At M5 Bushing24.959 – 24.98024.94
Countershaft O.D.
– At C2 Bushing26.959 – 26.98024.94
– At C3 Bushing24.959 – 24.98024.94
Bushing-to-Shaft Clearance
– M5, C20.020 – 0.0620.12
– C30.005 – 0.0470.08
Shift Fork, Shift Fork Shaft
Fork Claw Thickness4.93 – 5.004.8
Shift Fork I.D.
– Center11.003 – 11.02411.04
– Right12.035 – 12.05610.07
– Left12.035 – 12.05610.07
Shift Fork O.D.
– Center10.969 – 10.98010.96
– Right11.966 – 11.98411.95
– Left11.966 – 11.98411.95

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