Seem to have developed a problem on my 1200 XLT. The Aft cylinder piston overheats, burns a hole in the exhaust side and evenually tears up the cylinder. Done this twice now (through a mechanic) but the mechanic is not sure what it could be. This has to stop and be repaired correctly but no one seems to know what is going on. Open to any discussion with anyone who may have experienced this or just knows what is going on here. Last one lasted only 1 day. Worked great after the rebuild for one day then quit coming out of the shoot on the second morning.