Same-day shipping cutoff: Noon Pacific Time

It's never too early to start thinking about the next calendar photo contest.  Submit your photos here all year round to be considered in next years calendar and maybe win a prize too! 

CRF300L: Fuel and Intake

CRF300L

Introduced in 2021, the CRF300L came with an abundance of changes with the biggest being; a new 286cc motor with a huge increase in torque, higher ground clearance (11.2 inches) and lighter weight overall compared to the CRF250L.  Fuel capacity remained the same at 2.1 gallons.

Chain Size:        Front Sprocket:        Rear Sprocket:        Front Tire:        Rear Tire:        Spark Plug:
520x106 14T 40T 80/100-21 120/80-18 SIMR8A9
Go to Category

Fuel and Intake

EFI Programmer, EJK

CARB   WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
CRF300L '21 - '25

The EJK evolved out of the need to address the ever-increasing complexity of factory fuel injection. For the newcomer to the market or professionals wanting an easier method for tuning fuel injection, the EJK is a customizable solution for the rider that wants to take control of their tuning needs.

This unit is a piggy-back EFI controller because it does not replace the stock ECU, but rather monitors the signals to the injectors and makes fuel adjustments based on the mode settings. The GEN 3 has a push button interface allowing access up to 6 different modes to allow for quick fine tuning by the end user without needing a computer.

Key Features:

  • No computer or dyno needed!
  • Plug and play, simple to install, base settings preset
  • Unique load based technology
  • Full range tunability available
  • Does NOT interfere with stock ECU operation
  • Simple push button adjustment interface
  • Water-resistant 
  • 2-Year warranty
  • Compact size - 2.2" H x 3.4" W x 0.5" D
Please contact us for availability information
$236.95

EFI Programmer, JD Jetting

CARB  
CRF300L '21 - '25

Dyno and field tested, the Power Surge 6X will allow correction for humidity, temperature, air pressure, along with race fuels and motor modifications. The tuner adjusts in a matter of seconds in 6 zones, including an accelerator pump feature for more throttle snap response. The tuner can add or subtract fuel from the injection system. Conditions like rich or lean running, and stalling from flame-out at low revs can be corrected.

Ships in 3-5 business days
$251.95

Washer, Spring, O-Ring, JD Jetting

WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
Universal fit. May require additional adjustment or modification.

Genuine Keihin spring, washer, and oring for the fuel screw of FCR and FCR MX carbs.

Just the parts…
Fuel screw spring, washer, o-ring (fuel screw not included)

Ships in 3-5 business days
$8.95

Air-Box Filtered Vents

Made in USA WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
Universal fit. May require additional adjustment or modification.

Sold in 6 packs

  • Compatible with many air filter boxes. Easy to install by drilling 1’’ holes in airbox housing and snap fitting vents in.
  • May be cleaned and re-oiled
  • More air flow allows you to add more fuel to your intake mixture, increasing performance.
  • 1" Diameter

Not legal for use on pollution controlled vehicles in the state of California.

Ships same business day
$14.95

Clamps, Nylon Ratchet Style

WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
Universal fit. May require additional adjustment or modification.

Quick release one-piece clamps that saves space. These are great for fuel lines, controlling wires, and can be used many times.

Comes with 4 each of 8mm, 9mm 10mm, and 12mm.

No special tools needed, from Helix Racing.

Ships same business day
$9.95