ok so im looking for someone that works on 500s in mass like engine mods and thing any one have any thing for me

 

Do you mean as in they have worked on a lot of them? Some of the big names over time have been CT or perhaps Duncan. There just aren't a lot of them out there like the 250's. I have ridden multiple CT ported cylinders and they have all been good performers. My current TRX cylinder should be back from C Leigh Racing in the next week or so. I have heard a lot of good things on his work with the 250R so I am hoping this thing will rock. Not sure if he has done many Zilla's though. Have you tried asking around on the 2 stroke forums? Or maybe even the old trike forum?