Help am I running lean...

Discussion in 'Jetting' started by TrynaLearn, Jul 3, 2020.

  1. TrynaLearn

    TrynaLearn Member

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    Hey guess I know this question been asked a million times but I gotta ask again... I have a blaster just had a 3mil installed and some port work done stock mini 26mm with a 250 main also has a full fmf exhaust and airbox lid off is that to lean...
     
  2. Awk08

    Awk08 Administrator Staff Member Technician

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    just the lid off probably needs a 250 and the FMF alone requires at least a 270
    I always recommend buying 270 thru 310 main jets for the FMF pipe, start large with plug chops and work down
    https://www.blasterforum.com/threads/how-to-plug-chop.53237/

    we've tuned and ran FMF/lid off blasters here with 290 and 300 mains, at 1800' elevation in summer temps
    lower elevations will need richer, higher elevations leaner
    then rejet richer 1-2 sizes for cooler fall/winter temps
     

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