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About 421yzf

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  1. 421yzf

    2017 GYTR head and cams

    how does it run? worth 2000 ?
  2. Has anyone installed a GYTR head and cams set up on a 2017 yzf250? any articles written yet? thanks in advance
  3. The 2017 seems very loud . When i get a new pipe like an fmf or other do I need a whole system or just a slip on. any suggestions I mostly ride moto. thanks in advance
  4. 421yzf

    gytr map 2017 yzf 250

    a little better throttle response and power with u4.4 can u post link to maps
  5. I have a new 2017 yzf 250 Any map suggestions for mx tracks max power stock bike now future mods pipe vp 4.4 fuel mix 50/50 with pump gas thanks in advance