my 95 waveraider was working great last season. this season brought many problems. first the 3 piston spark plug broke and i replaced that took it out and rode it for 5 mins and it died on me. it sounded like the crankshaft was loose. it wouldn't even start its just click and the piston were locked up. i took the whole thing apart and noticed that the 3rd piston wouldn't move and there was metal scraps on top of the piston. the cylinder wall was fine. i'm thinking i'm going to need a new piston where can i get one for cheap? thanks