Where can i find some performance parts for my 250 twin cylinder buggy?

Question

its a 250 four stroke off road buggy and i was told it was a yamaha copy when i bought it

it goes realy realy well at the moment but it also starts to misfire when its under load going flat out is this just a tuning problem?

Answer 1

Check out http://diesel-performance-direct.com . They seem to have good selections of performance parts for many types of vehicles.

Answer 2

It has a rev limitor so web search the buggy or engine for mods>