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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. YFZ Powertrain
    Hi first post here. 2019 YFZ450R Stage 2 hot cams HMF full exhaust Power Commander V I'm going to do a 478 Cylinder works big bore, due for a new piston so I figured what the hell. I've been looking for maps for the PC-V to accommodate the changes, I haven't had any luck finding any...
  3. YFZR-X Powertrain
    I have just done some mods to the bike, a vision air intake to the stock air box, AIS delete and a vortex. I need some help/ recommendations picking a map. P.S. it's a 2017 with a full Yoshi system Any help appreciated! :)
  4. YFZ450 & YFZ450R General Talk
    I have a 2019 yfz 450r with a full hmf egg shape exhaust, gytr air filter mod, and the hmf fuel optimizer. If someone could help me out with what I should adjust the settings to for the best tune. Right now it is the beginning of winter where I am. It still has a slight bog and the pipe glows...
  5. Maintenance
    I have a 2019 yfz 450r with a full hmf egg shape exhaust, gytr air filter mod, and the hmf fuel optimizer. If someone could help me out with what I should adjust the settings to for the best tune. Right now it is the beginning of winter where I am. It still has a slight bog and the pipe glows...
  6. Maintenance
    I have a 2019 yfz 450r with a full hmf egg shape exhaust, gytr air filter mod, and the hmf fuel optimizer. If someone could help me out with what I should adjust the settings to for the best tune. Right now it is the beginning of winter where I am. It still has a slight bog and the pipe glows...
1-6 of 6 Results
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