ZS155 RACE ENGINE - STAGE3
- Bore x Stroke 60mm x 55mm
- Processing of intake and exhaust ducts porting with modification of geometries, with specific surface finish (exhaust / intake)
- CNC flattening and head grinding
- Modification of combustion chamber geometry + polishing
- Pair of lightened valves with a high flow profile
- "Made in Italy" single valve springs
- Titanium valve retainer
- Optimization of the compression ratio and phase
- 60mm cylinder
- 60mm piston