300exr
01-08-2005, 08:38 AM
I have an HMF slip on for my 300 and I went up 5 sizes on the main jet like it said to do and left everything else the way it was.
However, whenever i let of the gas it backfires alot. What do I need to do to fix?
However, whenever i let of the gas it backfires alot. What do I need to do to fix?