The 450 2 stroke engine of this snow bike is placed further back than on a normal snowbike, it must give more traction initially than a YZF450 whose driver and engine are in front of the track. I found a similar engine:
It seems well done and it has everything ready for 100HP !, directly compatible on a CRF450R.
I evaluated different engine to put in the Small-Doo, the simplicity of industrial engines has the consequence of giving the lowest possible weight on the snowmobile. (They also more affordable) I am however close to the limit of HP possible on an engine block that is designed initially for only 17hp, (but in continuous) It is always more fun to have more power, but with the industrial engine I have the best buoyancy possible with enough power to do the job. The second best choice, (but much more expensive) would be a 4t 450 dirt bike, I would like it to be possible to remove the manual transmission to put a CVT.
Very interesting engine for a light snowmobile!Fastrax Motorsports motor is a fully developed single cylinder cvt motor.
90 hp cvt. (The only one in the world I know of)