CRF300L EJK Fuel Injection Controller
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EJK, short for Electronic Jet Kit, provides the best available EFI (Electronic Fuel Injection) controller for the 2021+ Honda CRF300L and 300L Rally. We recommend this product any time you are installing an aftermarket exhaust and air filter on your bike.

Benefits on a Stage 1 Honda CRF300L:
If you've decided to add an aftermarket exhaust and/or intake system (Stage 1 mods) to your CRF300L, an EJK EFI Controller is HIGHLY RECOMMENDED if you want to take full advantage of those performance parts. Aftermarket intakes/air filters give your engine more air, and exhaust systems allow it to breath better. Without an EFI Controller, the bike will run lean and you may experience pinging or backfiring, and the bike may run hot. Additionally, without the proper fueling that an EFI Controller provides, you will see little to no performance gains from your new exhaust system and, in fact, your bike may run poorly.

  • 2021+ Honda CRF300L and CRF300L Rally
  • Please see the Manufacturers Website for more details and setting information

    Standard Features:
  • Plug-n-play installation
  • Simple and easy tuning with no dyno required
  • Simple Push Button Adjustment Interface
  • Does not require a computer or software to tune
  • Comes pre-programmed for the best results
  • Load Based Tuning takes into account RATE, TPS and RPM to construct three main zones for fuel adjustment
  • "On-the-fly' tuning. You can make fuel adjustments in your garage or on the side of the road
  • Does Not Interfere with Stock ECU Operation
  • Water-Resistant
  • 2 Year Warranty

    Part Numbers:
  • 2021+ CRF300L/Rally: 9110044 (old #9110035)

  • ** OUT OF STOCK - Check back to this product page for availability, or to be notified when this item is back in stock, just email us at

    We might have the JD Jetting EFI Controller in stock.

    CRF300L EJK Fuel Injection Controller
    9110044Retail Price: $259.99Our Price: $254.95

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