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  1. 2009 kfx450r dies while riding.

    Engine/EFI/Drivetrain
    I’ve been struggling trying to figure out what’s wrong, it will be running great then cuts out, backfires, and bogs then dies. This happens at different lengths of rides from a couple blocks to 40 miles. I will turn it off and back on the fuel pump cycles, all fuses are good, cranks just won’t...
  2. Running very badly

    Engine/EFI/Drivetrain
    I have an '08 kfx 450r that just recently started running very badly. It started when I took it to a riding place that turned out to be extremely muddy and coated the quad brown. While I was there it started to be hard to start, and bogged down when I gave it throttle every once in awhile. Since...
  3. Starting/Running Problems

    Dyno/Tuning Room
    I recently purchased a 2008 KFX450 knowing little about quads and the after market mods on the bike. From a second/third owner who knew less than me about quads. Problems: 1 :The bike wont start with the electric starter (bump starts fine) The temp dash light does not remain on. The battery is...
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