Re: Crushing Aluminum
sounds like a new heavy metal rock band !!!!
but srly ..... u bolts are one of the best ways to mount a motor to a frame ! keep tightning it till you see the frame start to crush a tiny bit and thats how you know its tight enough !
i have a 35mph bike and the motor is held on by a u bolt in the rear with a plate going to the case bolts and a single 5/16ths through bolt, bolted through a steeel plate on the frames down tube and the motor boltas to that. have not had a single problem ever and the motor is as solid as a rock !
the bolt that goes through the frame in the front mount is has large washers bent in a curve to match the frames curve and its tightend so tight it crushes rthe frame slightly, this means the fram is crushed in just enough to want to push or spring back out and it keeps tention on the bolt to stay tight.
Last edited by rogergendron1; 01-06-2014 at 10:43 AM.