EJK fuel controller installation for Honda CRF 300 L

UPDATE 10.1.2022

The previous setting was not working to my satisfaction. The bike seemed to choke and stalled at time to time. I switched up to a more conservative settings and at least in winter conditions it seems to be ok now. Again, not looking for performance gains, but just to eliminate the jerkiness.

UPDATE 16.12.2021
First very short test run. At first it felt much much better. I could crawl along with first gear and the bike was not jerky at all, but after a few minutes the jerkines came back! First gear was as bad as ever. I can’t figure this out. Could it be that the stupid euro ECU has some sort of learning / self adjusting function that is causing this? Or is the cold engine less jerky?

I was running the below settinngs as a some sort of compromise over EJK recommendations
GREEN – CRUISE FUEL: 3
YELLOW – ACCELERATION FUEL: 3
RED – FULL THROTTLE FUEL: 3
GREEN-BLUE – IDLE SWITCH POINT: 4,5
YELLOW-BLUE MODE – ACCELERATION SWITCH POINT: 3
RED-BLUE MODE – FULL THROTTLE SWITCH POINT: 3

————————————————————————————————————————–

It finally arrived today. As it is minus 17 degrees Celsius, I haven’t done a test ride yet nor do I have a clue what yet the best settings are.

Recommended settings from EJK website

IMPORTANT!

I just noticed that EJK has come up with a newer different model that also fits the CRF 300. The newer model is 9110044 and mine is 9110035. The base settings are very different.

The above settings are for the newer model

I have contacted EJK regarding the model differences and recommended settings. Hopefully they have the time to answer.

>> EJK website (no affiliation)


I d id install it though and it was pretty simple and easy.

  1. Remove fairings and seat
  2. Lift up tank. ( not necessary)
  3. Disconnect battery
  4. Unplug factory connector
  5. Plug in EJK Gray connector to injector
  6. Plug original gray connector to EJK
  7. Connect EJK to battery (ground)
  8. Start bike and see if green lights come up
  9. Done
Disconnect battery
Lifting the tank makes it a lot easier to deal with the plugs
The gray plug is what needs to be disconnected and replaced
The factory plug disconnected
I placed the unit above the tool box for now

UPDATE [11th, Dec. 2021]

Relocated the unit behinf the airbox. It’s attached to the fender with rather large velcro strip.

15 Comments Add yours

  1. Álvaro Javier Fernández Zamora says:

    Try Green 4, yellow 4, red 1 and then 5, 4.5, 4.5 for 300 L with stage 1 modificacions as specified on EJK web site or have a look on the web for other combinations or no modifications at all. Good luck.

    Like

    1. JN76 says:

      Thanks! I just realized that EJK has come up with a newer model since I placed my order.

      Like

  2. billou06 says:

    I just ordered the EJK 9110044, let us know the tests and settings you will have done …
    Rgds,

    Like

  3. billou06 says:

    First tests with EJK 9110044 and recommended settings for CRF300L 4, 4, 1, 5, 4.5, 4.5 and standard exhaust configuration and airbox
    Net improvement at acceleration, more saccades, more progressive, on the other hand, always brutal cut to deceleration, impossible to slow down gradually, there is a clear cut of fuel supply. I continue the tests …

    Liked by 1 person

    1. Álvaro Javier Fernández Zamora says:

      I think the setting you have now is for stage one modification,( full exaust and air box modification). Have a look on EJK web site and see the setting for crf 300 l standar.
      Good luck

      Liked by 1 person

      1. billou06 says:

        I get on the site, I did not find settings for a standard CRF300L, and you, what are the settings you are using to be satisfied?
        Thank you

        Like

      2. Álvaro Javier Fernández Zamora says:

        Hello,
        I started 4-4-1 and it was perfect but too much petrol compsumtion.
        Went down to 4-2,5-1. Same good and less petrol drinking.
        Now I am trying 4-2-1 and the bike is perfect but still do not know about compsumtion.
        My bike is on Stage 1 modifications.
        According to EJK, standar 300 L with no modifications is 6-2.5-2.
        Good luck

        Like

  4. billou06 says:

    Thank you Alvaro for this information, while waiting to put my CRF300L in Step 1, I will try the settings you gave me for standard mode.
    In curiosity, can you tell me what exhaust and which filter / modification of the air box you did?
    Rgds,

    Like

    1. Álvaro Javier Fernández Zamora says:

      Hello,
      Full Arrow exaust and ADN (I THINK) air filter.
      It was the only choice I had at the time I bought them.
      Do not doubt on asking.
      All the best

      Liked by 1 person

    2. Álvaro Javier Fernández Zamora says:

      Sorry, DNA air filter.
      Best regards

      Like

  5. billou06 says:

    Hi JN76,
    Have you been able to find an EJK setting to attenuate or delete low speed motor shakes?
    For my part, after trying various settings, still not satisfied.
    To answer your entitlement on the difference in behavior between cold engine and hot motor, I think the air / fuel mixture is richer cold (starter), which would explain that the jerseys are less cold, then when the engine is hot, the air / fuel mixture is getting upset and the jolts come back at low speed, first gear.
    Rgds,

    Like

    1. JN76 says:

      No. Too much snow & too cold to do proper test runs. All energy goes to staying upright and the throttle use is pretty far from normal in these conditions. Will have to wait for spring.

      Like

      1. billou06 says:

        Ok, here on the Côte d’Azur, the weather is fortunately more clément and I take this opportunity to try to improve the progressivity of the accelerator. I will try to modify the gas handle to have a softer attack on the drawing of the accelerator cable as does the G2 Dirt Throttle Tamer.
        I Wish You has Happy New Year’s Eve

        Like

  6. Fabio says:

    Hi, in Italy there is a guy who realize a very simple issue for solve the on/off problem.
    You can find more information here: http://www.belinassu.it

    Like

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