It is not possible to run a CR750 engine reliably on the standard gear change for four main reasons. Reliability, Durability and incorrect ratios combine with a notchy and somtimes hit and miss gear change. Over Racings brand new racing five speed box addresses all these problems:
* Wider and larger gear module improves strength and durability of tuned engine
* Main shaft, counter shaft, and final driven shaft are re-designed and newly engineered for increased durability and reliability.
* Enough clearance between clutch center lock nut and main shaft to allow enough torque to be applied, ensuring long term reliability
* Also fits standard engine cases without modification
The use of a tapered dog makes for smoother gear changes and less negative changes, increasing durability of engine.
Gear Ratio1st2nd3rd4th5th
Main gear1619212325
Counter gear3531292726
Ratio 2.1881.6321.3811.1741.040
* Over racing specify this five speed assmebly in their CR750 race bikes.