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Have you checked YouTube, lots of info on there? Would love to see pictures of your build!
I used a 71 snow jet that was free and in really tough shape. I used a predator 212 and a cheap 30 series torque converter along with the existing chain case on the sled. I'd have to count but I used either a 30 or 20 tooth sprocket. Top speed is 20 mph which is more then enough
Nice.ive got engines and torque converters already but need a junk donor sled.anyways was wondering why you didnt use the stock jackshaft with the original chaincase and brake setup from the snowmobile ?im going to just remove the original torque converter and replace that with a gear that works with the original chaincase and gears and it will have the original brakes still.Just wondering.
I used basically the same setup you did in my build. What I did was went on Mcmaster carr or amazon and started searching for the largest sprocket I could get to fit on the jack-shaft without hitting the tunnel with the chain on the sprocket. I started out with just using the setscrew to hold to the shaft and it spun on me so I took an angle grinder and added a slot for the key way, no issues since so good call on having it cut right away. I used the 212cc from HF and I am really wanting to upgrade to the 420cc for the extra power hold at full RPMs in deeper or wet snow/slush, and also to the electric start and charging circuit to run a headlight would be awesome!One lookout I will recommend to all builds now is to build a hood. I didnt have one on last year and it sucked snow into the airbox when running in powdery snow. It didnt affect it until I stopped and the snow melted from the engine heat, then froze up the carb when the machine sat while I was fishing. Couldn't get it to go above idle and engage the torque convertor because of the ice in the carb. Ended up driving out with a trailer and loading up on the ice, which I REALLY didn't want to do with my new truck. but there was 2 ft of ice at that time.