Do i Need to Re tune the bike?

1 reply to this topic
  • Defyz426f

Posted June 27, 2009 - 03:09 AM


I'am adding hot cams "exhaust & intake" , also new fmf pipe & exhaust to my yz426f. do i need to re-tune or re-calibrate soemthing? jetting,valve,ect.. need help! grr:banghead:

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  • stevenacarter77

Posted June 27, 2009 - 04:35 AM


ya, anytime you change the flow it is not going to act right, i would also add a high flow air filter also, like a uni and follow these carb tuning instructions

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