For more information about the crankcase, crankshaft and pistons check out our articles below!
Crankshaft

Specifications and Tolerances – CX500 Crank
Item | Spec | Service Limit |
Main journal oil clearance | 0.020-0.060mm 0.0008-0.0023″ | 0.085mm 0.0033″ |
Main journal oil clearance | 0.020-0.060mm 0.0008-0.0023″ | 0.085mm 0.0033″ |
Crankpin oil clearance | 0.028-0.052mm 0.0011-0.0020″ | 0.080mm 0.0031″ |
Conrod side clearance | 0.150-0.350mm 0.0059-0.0138″ | 0.06mm 0.024″ |
Primary Drive Gear(s)
The primary drive gear setup is a split gear for the 500 variants – Turbo included – where it moved to a solid gear for the 650s and the split gear was moved to the clutch for those models.
Bearings
- How to find out what size bearings you have
- How to remove the crank cap bearing
- How to remove the crankcase main bearing
- How to measure the main bearings, colour codes
Crankshaft damage examples
Crank Case
Specifications and Tolerances
Item | Spec | Service Limit |
Cylinder Internal Diameter | ||
Cylinder Warpage | No warpage | 0.1mm 0.004″ |
Crankcase Breather
- What is a crankcase breather and why do you need one?
- Crankcase breathers + pod filters
- What is the tube beneath the right intake?
Crank Plate
Pistons
