High compression MHR racing crank from Malossi with 85mm length rod with 12mm gudgeon pins especially for 50cc MHR Team cylinders with modular head [M.3111511]. With 5mm spacer kit for other racing cylinders with 70cc capacity. Top Malossi quality and safe up to 16,000rpm. Forged rod and precision bearings for extreme demands. Full cheek design allows for optimal pre-compression and great torque at higher revs. Please use the 5mm spacer kit on any cylinder other than the M.3111511.