Keefer Tested

Top 5 Mods: 2021 Yamaha YZ250F

Comments (5)
  1. So who has the better mapping for the Vortex…XPR or Twisted? we have Pro Circuit T6 pro and light headwork running U4. Stock Cams

  2. 35+ b/c rider here. Currently riding 2019 KTM 125sx with full Lynks mod motor. Smile factor is my #1 priority. However, I do value power as long as it is “ride-able”. How much more power would this give and would it be worth the switch? I like the sound of the “free feeling” map and torque of a 4 stroke packaged together.

  3. When you purchase the ecu. Does it come with the map Jamie had created? Im a 40bc rider. Riding against 450s. So anything I can do to add some grunt is what im looking for.
    I currently have these parts
    Slater skin
    Twin air power flow kit
    Dr.d slip on pipe

  4. Hey I’m on a stock 2022 yz250f having a lot of problems with my starts in second gear it bogs coming off the gate and can’t get a good jump and also can’t get my rpm’s up tell I’m 20 feet past the gate. Any tips?

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