I am installing a modified GP crank with a 110mm Jap con rod. The barrel I am using is a MB tuned Stage 4 GP with a Race-Tour piston. I will be replacing the piston gudgeon pin with new, and want to know the dimensions of the gudgeon pin used for the Race-Tour and whether the Race-Tour piston should take a wider 16x20x22 gudgeon pin bearing.

Question

Accepted Answer

This is the Gudgeon pin  	MPP16GUD57 and this is the small end required 20mm wide  	MBB0112

Lambretta Piston gudgeon pin for MBgm RT225 and MB Race-Tour pistons