Busted this one out again yesterday when my son said he wanted to ride something faster than the 50mph mini Gote I built and he rides. He watched me take a full pull down the street on it and said no way he wants to ride it. It does still haul ass 63-64 mph all day long.
@ole4 you da man.
Thanks for the kind words, I just did something similar, I had built a drag bike out of a speedway frame which I documented on here as well as the motor build in 2017. It just sat in the garage till covid when David Wulf kept asking me to run it. When I did it was disappointingly slow and I just put it away with all my other mini's. About a month ago I was out in my outbuilding charging the batteries on the two drag bikes and decided to figure out what was wrong with it. Turns out it had a number of issues I found and fixed and now its very fast, loud and fun but i think there is still more to go when I have the time. When I ran it in 2000 it would not engage the Salsbury TC until 5000 RPM, then when I opened the throttle it would go to 7500 then after a few secs to the end of the tach at 8000. at that point it was maybe going 20MPH. When I took it out to look at it a month ago first thing was tank was full of rust from sitting. De rusted tank and coated it with caswells dragon blood. That fixed I decided that the TC was needed looking at. What I found was the plate under the motor has a cutout for a TC but it went under the driver and prevented the belt from letting the driver opening and putting a ton of drag on the belt had to cut out the plate under the driver. I then changed springs and arms to allow a 3k engagement and also reduced the spring windup on the driven unit. That allowed the TC to operate correctly and in a good RPM range engaging at around 3K. I had it geared 12 - 83 and replaced the 83 tooth with a 70 tooth sprocket. With those changes it now screams but at high RPM,s when you get off the throttle it had a lot of engine braking until RPM's drop and the belt can slip. I may also play around with intake length. I used pipemax to calculate intake and exhaust length but the intake is adjustable. Here are some pics of the TC issue and the bike. 1st pic is with the engine plate cut away for belt clearance. Next old and new rear sprocket, and some pics of the bike now.
