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jetting exhaust upgrade

  1. Polaris Predator
    I have a 2003 Predator 500 with a CFM airbox and an HMF exhaust and headpipe. Does anyone know what jet i should be using? HMF wants a 155 for its exhaust but when I put my CFM airbox on without an exhaust it ran real lean. I'm a bit new to the predator platform and any jetting tips would be...
  2. ATV Racing Discussion
    I put a yoshi RS5 exhuast on my 08 outlaw 525s and was wondering what stage jets I should use to stop the sputtering on top end of each gear. Or any advice on the matter.
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