Here is the infamous Yamaha rod kit conversion. Kit includes crank pin, special High Performance crank pin bearing wristpin bearing and washers. This conversion will require machine work. Extra effort but worth it.
Reproductions
If buying for Explorer or MAR after 1974 you will have to verify if you have a straight crank pin or stepped pin.
1974 Ossa Desert Phantom
1974 Ossa Phantom 250cc
1974 Ossa Super Pioneer
1975 Ossa Desert Phantom
1975 Ossa Phantom GP1
1975 Ossa Super Pioneer
1975 Ossa MAR Mick Andrews Replica 350cc
1976 Ossa Desert Phantom
1976 Ossa Phantom GP2
1976 Ossa Explorer 350cc
1976 Ossa MAR Mick Andrews Replica 350cc
1976 Ossa Super Pioneer
1977 Ossa Desert Phantom
1977 Ossa Phantom GP3
1977 Ossa ST-1
1977 Ossa Explorer 350cc
1977 Ossa MAR Mick Andrews Replica 350cc
1978 Ossa Desert Phantom
1978 Ossa Explorer 350cc
1978 Ossa Six Day ISDT