Ive got a brand new piston for this cylinder and some spacer plates and gaskets etc Had 2 of these bikes in the mid 90s they were very fast. let me know if you wanna buy the parts for cheeep . I used Noleen pipes back then If you can get some from Clark Jones its well worth it the stock 250 pipe will work but she just doesnt rev as well also the silencer core is a bit larger so it flows . Dyno might be able to set you up though.Make sure to reset your timing as the longer rod kit wants more lead timing. we used stock reed cages with active reeds but built reed stuffers out of epoxy to fill in the massive airspace .eventually we tried rad valves seemed too restrictive unless we opened them up a bit. wish i had that bike back actually.