So has anyone ever broken the pin on the crank that the con rod attaches to? Just rebuilt a 3.3 with some mild modding. I polished, and rounded sharp edges on the crank, and some minor polish, and smoothing on the sleeve. I got about 5 tanks after breaking, and this thing was running really good. Wheelies on command with a 54/20 gearing. Was running saturday and it just died, would not restart, and I could spin the flywheel with no resitance. Removed back plate and found the pin on the crank broken. Luckily no other damage. I am gonna clean up real good, and replace the crank, and try again. I have a losi 3.4 carb ready to install, I just wanted get a little ways past break in first.