I bought a baja from a guy in my area. It is a very nice baja. It has a gizmo 30.5 full mod in it. I took it apart and it had a hole blown right through the piston. I took the motor completely apart and cleaned it out. Bearings felt good and no damage done to the cylinder. Ordered a piston and upper bearing and all the gaskets. I got the piston and its not a full mod piston. But i put it in regardless. I wanted to run it before the snow comes. Ran it around the shop some breaking it in. Seemed pretty snappy. Done with break in now. Put the paddles on it today and took it down to the beach and it ran great for 5 minutes. then it seemed to start loosing power and not enough smoke commiing out when you pin it. So I brought in in to check it. Idle was surging, started to adjust the lsn and it wouldnt make a difference untill it just stalled. To much fuel, adjust it back and still surges. It seems like it has a air leak but I am not sure were. Only does this when its hot. Cooled off it runs great. Can I send you guys the complete motor ? I would like it correct. Or is it going to be cheaper to buy a new one?