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  1. 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. Engine/EFI/Drivetrain
    start the bike up and it runs for about 10-30 seconds, and it dies out. doesnt matter if its idle, or rev. my thoughts were either a bad fuel pump, or injector. not my bike, but my best friends 08kfx450r. he pretty much had the entire engine replaced after an overheat blow out. new crank...
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