So I replaced the joint that goes from the drive axle to the speedometerhousing thing. I tried it on the stand, worked. I let the sled sit for a while while I was indoors, and then I went riding, for the first 200-300 meters it would not work, and I thought, fine the joint is broken again, but then it suddenly sprung to life. I cannot imagine what could have caused this, there is a direct connection between the drive axle and the speedometer, so if anything bends, making the speedometer not read, it will break. Thoughts?