YX & ZS Gearbox Shim Upgrade
These shims sit between the gear and the bearing in the crank casing.
These shims are to adjust end float in each shaft when building your engine.
Well sell a variety of thicknesses.
Fits Manual Gearbox Shafts:
INPUT SHAFT DIAMETER OFFSIDE= 17mm
INPUT SHAFT DIAMETER NEARSIDE= 12mm
OUTPUT SHAFT DIAMETER OFFSIDE= 15mm
OUTPUT SHAFT DIAMETER NEARSIDE= 17mm
Input Shaft Shim OFFSIDE Spec:
SHIM O.D = 24mm
SHIM I.D = 17mm
SHIM THICKNESS = Choice Of
Input Shaft Shim NEARSIDE Spec:
SHIM O.D = 12mm
SHIM I.D = 18mm
SHIM THICKNESS = Choice Of
Output Shaft OFFSIDE Shim Spec:
SHIM O.D = 22mm
SHIM I.D = 15mm
SHIM THICKNESS = Choice Of
Output Shaft Shim NEARSIDE Spec:
SHIM O.D = 17mm
SHIM I.D = 24mm
SHIM THICKNESS = Choice Of
Please Note:
Too much float will result in the engine jumping out of gear.
Too little end float could result in gearbox being tight and unable to select gear and somtimes neautral.
Picture for demo only.
Nearside = Flywheel Side
Offside = Kick Start Side
Item Includes:
1x Shim Washer






