as some of you know i have a 93 KDX 250 with a killer big bore motor [292 reeds & a dynoport exhaust] dorkboy2 loves the motor but hates the over weight & cumbersome chassis anybody know how much newer of a frame this motor will fit in id like to keep the swing arm for the cam type axle adjusters and maybe the bigger than KX radiators or do i fix the suspension and hope
Just my opinion, always keep a bike complete. The only motor swaps that I condone are 500cc in a modern perimeter frame, or when a nice new chassis has a hopelessly blow 4t motor and there is a good doner 2t available.
Lots of people do the KDX (200) in a KX swap. Quite popular. It's not a plug-and-play swap, but it's not that horrible. I have considered it multiple times, but thought better of it. IF YOU JUST GOOGLE FOR KDX ENGINE IN KX FRAME YOU WILL PROBABLY FIND A LOT OF LINKS THE PEOPLE WHO DO THIS POST PICTURE OF THE SWAP THERE IS ALSO LOTS OF INFO I THINK THAT LOOKING ON GOOGLE WILL HELP ALLIGATORS