Yamaha GP643 Snowmobile (1972-1973)

The Yamaha GP643 was a notable performance snowmobile produced for the 1972 and 1973 model years, featuring a powerful 643cc two-stroke engine. This model was a prominent offering in Yamaha's lineup, with the 1972 version even achieving world champion status. The "643" designation consistently indicated a 643cc engine displacement, a common practice for Yamaha snowmobiles of that era. A significant update occurred between these two model years. The 1972 Yamaha GP643 delivered 43 horsepower at 5500 RPM. For 1973, the GP643 saw an increase in power, producing 50 horsepower at 6000 RPM, indicating a performance upgrade. Other variations using the 643cc engine included the EW643, known for its electric start, and the 1973 SR643B, which featured a 15-inch track compared to the 18-inch tracks on other 643 models. Q: How do I ensure this part fits my 1972-1973 Yamaha GP643?

A: To guarantee compatibility, please use the year and model selector at the top of this page.