i have a 04 ec300 and one of my buddies put a brp set up on his 06 which came with fat bars already so i ended up with his fat bar mounts they bolted right up i know protaper makes them i think there around $100 bucks i got lucky and got his factory ones cheap might try to find some for a yz 250 on ebay im pretty sure they bolt up the same my old 7/8 mount was for a gpr and side yamaha on it just remember they bolt up solid and dont use a rubber mount
