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  1. YFZR-X Powertrain
    2017 450r HMF performance slip on exhaust HMF fuel optimizer Pro design - Pro Flow K&N intake w/o a top cover I'm noticing slight hesitation at lower rpms when rolling into throttle/light acceleration. As well as an excessive amount of backfire around those same rpms or with light blips. Mid/top...
  2. YFZ450 & YFZ450R General Talk
    Probably a dumb question but what is the hose for on the FCI intake tube that comes with it?
  3. YFZR-X Powertrain
    Hi all, new to the page. Bought a 2018 yfz450r that’s completely stock and I think it’s a giant turd compared to my kfx450r with just a exhaust on it ha. Anyways what would everyone recommend for the big 3 setup? I like the look of the rossier exhaust, and obviously I know everyone thinks the...
1-3 of 3 Results