433cc Yamaha Engine

Mike Trapp’s 433cc 1971 Eagle River World Championsip Engine

This is the engine that powered Mike Trapp to victory over the other brands’ 800cc sleds, in what was billed as “The Greatest Race in History”. Some of this sled’s unique features include:

Keihn Alcohol Carbs
6 Bolt Heads
1 Off Sand Cast Chrome Bore Cylinders with Teflon Coated Exhaust Ports
The Original Left Exiting Exhaust Pipes that were later Ceramic Coated for Yamaha’s Grass Racing Effort by Yamaha’s Race Director, Mike Bowers