Ok im building a custom 250sx. its been a ongoing project for a long time. Well just giving it more suspension wasnt enough so im going to lenghtin the swing arm. Im going to put a big red moter in because the SX moter blew up. Is the gearing change between a big red and a sx in the moter or the rear end? And does any one know were to get a big bore kit for a big red or sx. i need more power. If you wnat to see pics of the SX curently check out my pics.

 

Good luck on the 250sx. I still have mine and still love it . It was a caddilac of its time. I have a couple of pics on my page (i think).

 

ok ill havesome pics up in a bit i just finished lenghinin the swing arm last night, still gotta lenghtin the drive shaft. the swing arm is 7 inches longer. It looks to long lol.