Help, I need a plan for a expansion chamber for a Yamaha DT250, it's a 1975. I've converted it to a road bike and need a down pipe. I'm sure I can make it if I can get the specs? I have the routing worked out fine. I took two old pipes cut them up and welded them into the pipe that will fit and look the way I want. Motor is stock for now. Dry build is done except for this pipe thing. Thanks for any help.
Cheers, 50gary
Cheers, 50gary