i am thinking about putting a yamaha dirt bike yz426 motor in my sons 400 ex race quad. i know a few years ago there were a lot of these quads racing the mx tracks. does someone make the motor mounts, pipe, radiator brackets for this swap. what i am asking is there a kit to do this swap or is it all custom fab work ?

Mark

 

u should really buy a lonstar fram and swap everthing on to that