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Press Releases

YAMAHA GENESIS 4

Supertrax International
3/7/2017

THE 10 BEST SNOWMOBILE ENGINES OF ALL TIME! This list of 10 encapsulates all that is great in snowmobile powerplants going back several decades.


Yamaha’s “Genesis” designation originally stood for 5-valves per cylinder. In early 2003, SuperTrax was first exposed to the new 20-valve DOHC carbureted 4-stroke in the RX-1.

This was the first pure performance 4-stroke we’d ever ridden and it was impressive. We ran 1000-ft. drag races down a Wisconsin lake against a fleet of SR-X 700s and the RX-1 was faster.

Later, this engine got EFI and found a home in the Apex. Certainly the most complex engine to ever grace a snowmobile chassis, its unique and sweet exhaust tone, its stellar driveability, strong performance and incredible durability are its hallmarks.