a couple of fellow snobikers have been revising this project the last few years. For sure a frankenbike, was out the other day, current set up is a cutdown 3" track to 136 or what ever the correct number of lugs is, 4 cyl suzuki road bike engine, YZ 250 donor frame and forks and a lot of other things, was not a day to test it in deep snow, will spin the track at will on a good traction packed snow trail. Check out the radiators laid down on frame over track for cooling , no problem. Last year that motor in other frame and 2.5" track turned out not to be the ultimate deep snow weapon, all fun.