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06' crf 250 r bog solved

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im at sea level area. i read the article in mx action i went 170 on the main (172 )stock ,42 on the pilot(40)stock ,nhgt on the needle (nhfs) stock,50 leak jet (55) is stock, clip is third from top fuel screw is 1-1/2,(2) is stock it works fine no bog, this is with stock header pipe and mufflers.

now i installed a megabomb ti with 4.1 carbon fiber mufflers and i need help with jetting should i go with the jd kit and should i also get the r&d adj.leak jet ap. cover . thanks

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I am at about 600' above sea level. I have an 07 crf250r that's bogging at low rpm's. You think I can get away with the same jet sizes? I didn't check the other jets, but the leak is a 70. What is the letter designator on the needle? How did you come to this jet combination? trial and error or manual recommendations, or technician?

Thanks

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