Alright, yesterday, while riding, the motor heat seized. It lugged down worse and worse then just quit. I have just rebuilt this motor, this is the second tank of gas ran thru it, and until now its been running fine. Its a wiseco pro lite piston, hot rods rod, all that good stuff. its got K&N air filter, and carb is jetted to a 320 main I THINK, dont quite remember. After it cooled off, it started right up, no problems. Could anything have caused this besides maybe me just getting on it too hard on a hot day?