Crankshaft Stage6 HPC 45mm stroke / 90mm connecting rod Minarelli AM6

High-quality tuning parts from Stage6: Crankshaft Stage6 HPC 45mm stroke / 90mm connecting rod Minarelli AM6, perfect complement for racing and high-end racing cylinders.

Tuning specialist Stage6 developed this High Primary Compression (HPC) crankshaft especially for the Stage6 88cc cylinder kits (Big Racing + Streetrace).

The top quality full-circle crankshaft is completely made of metal, the counterweights are also made of metal. This ensures excellent balance and stability even at extremely high rpm. The connecting rod is forged which provides high strength and reliability far surpassing any cast connecting rod. For this version, the connecting rod is 90mm long / stroke 45mm.

This HPC crankshaft was built for tuned engines, and as a matter of course the Streetrace & Big Racing 88cc kits are not the pnly cylinders this crankshaft can be used with. You can combine it with all racing and high-end racing  cylinders that have to be run with a 45mm stroke crankshaft.

We recommend the installation of new crankshaft bearings, new oil seals and the use of the high quality Stage6 gear oil. You'll find the recommended products at the bottom of the page.

Note:

• Most Minarelli AM6 cylinders come standard with an 85mm connecting rod. You'll have to compensate the height difference with a 5mm spacer (except on Stage6 cylinders).
• The crankcase must be milled open a little; calculate accurately beforehand, lay out the parts and paint the correct dimensions onto the case to make the passage of the connecting rod clearly visible.

Technical data:

• connecting rod: 90mm (original 85mm)
• stroke: 45mm (original 39mm)
• piston pin: original (12mm)
• small end bearing: 12x17x15mm
• weight: 1320g
• maximum speed: 16.000rpm
• use: Racing / High End Racing