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custom-cruiser

Backfire on 07' WR450F

2 posts in this topic

07' WR450F with only 64 miles on it.

Mods-Grey disconect,throttle screw shorten,air box gutted,Pea shooter removed. Ran great.

I put on a TI Powercore and it fired right up the bike had smooth idle and sounded good,I did not ride. The next day I fired it up and POP POP POP backfire while trying to start. I pulled the hot start(even though it was cold) and it fired, same smooth idle and good sound. shut it off and tried it a couple hours later same thing POP POP POP :thumbsup: . What gives?

I have my JD jet kit and ZIP/TY mixture screw but not yet installed will this cure?

Thx CC

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Yes, you need to jet the bike. The pipe is letting it breath more. If you put the mixture screw in and adjust it, it will help.

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