Motorcycle Repair: motorcross/ jetting, air fuel mixture, pipe manufacturer

Question
I would like to know the recommended jet specification for a 1996 CR250rt Honda with a procircuit pipe and muffler.
Thanks.

Answer
Hi Dale,

Ask the pipe manufacturer for thier data or instruction sheet for this application.

I cannot calculate the corrected jetting with the information provided.

FYI... There's no drop-in jetting that get the air-fuel mixture correct without some tuning.

Respectfully,
Mark Shively