well, if i were you i would just save up some money and get a dg pipe and carb together and have them jet the carb for the new pipe, that way its all new + you dont need to worry about tuning stuff and you will have the most power you can get from it.....
1985 Honda ATC250R drag trike with s/t kit and full drag CR hybrid motor and drag chassis...
1986 Honda ATC250R daily rider fully modded engine, +4 swinger,etc...
1997 Polaris Storm 800 triple, boyesen reeds, dg individual silencers, 240 studs, 123mph on radar...