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Restrictor Plate on 2024 Hijet

Discussion in 'Performance' started by Lemms, Apr 9, 2025.

  1. Lemms

    Lemms New Member

    Hello...
    Has anyone removed the restrictor plate on a 2024 Hijet?
    Any information on the process for doing so?

    Thanks...
     
  2. Timmozig

    Timmozig New Member Supporting Member

    Are you referring to the speed limiter?
     
  3. Lemms

    Lemms New Member

    No. The speed limiter has been removed. I was told of an actual restrictor plate on the newer Hijets, and that you are able to remove that as well. Just unsure of the process.
     
  4. Timmozig

    Timmozig New Member Supporting Member

    Found mine. The restrictor plate is in the air intake boot. just under the big hose clamp.
     
  5. Dan Groves

    Dan Groves New Member

    So, what does removing the restrictor plate do for us?
     
  6. Timmozig

    Timmozig New Member Supporting Member

    The stock air intake is 19.60 mm the restrictor plate cuts it to a 8 mm hole. With more air/gas mixture comes more power.
     
  7. Dan Groves

    Dan Groves New Member

    That makes sense. Did you notice a significant increase in performance? What did it do to your mileage?

    Since the newer Daihatsu's have an OBD2 port, it seems the ECU could be tuned to increase performance. I have a tune on my Tacoma and it made a huge difference.
     
  8. Timmozig

    Timmozig New Member Supporting Member

    My restrictor had already fallen out into the airbox. So I have no comparison. This is a mod we've been doing to applicable dirt bikes for years with very good results.
     
  9. Lemms

    Lemms New Member

    So, it just fell out? Interesting... I'll take a look under the airbox today. What year\model do you have?
     
  10. Timmozig

    Timmozig New Member Supporting Member

    on top of the air filter. 25 Hijet jumbo
     
  11. Geekfest84

    Geekfest84 New Member

    How did you get on, did yours have a restrictor plate fitted and did you remove it if it did? I haven't got a Hijet to try it yet, but curious if there was any performance gain in any way. Thanks
     
  12. Lemms

    Lemms New Member

    Hey fellas... For anyone following this thread, I finally got around to removing the "restrictor plate" from my 2024 Hijet. It was more of a restriction than what I was expecting. Photos attached for reference. Get 'er done! 20260203_111429.jpg 20260203_111640.jpg 20260203_111729.jpg
     
    t_g_farrell likes this.
  13. Timmozig

    Timmozig New Member Supporting Member

    You you tell a noticeable power increase?
     
  14. Lemms

    Lemms New Member

    Yeah, not huge but noticeable....
     
  15. Dan Groves

    Dan Groves New Member

    New activity on this thread reminded me to get busy and remove my restrictor plate yesterday. I feel a quicker throttle response and it seems to come up to highway speed a little quicker. Now I'm wondering if the exhaust should be opened up some?
     
  16. Lemms

    Lemms New Member

    I am open to any other ideas to try and get as much as I can out of the 660 without hurtin' her...
     
  17. Timmozig

    Timmozig New Member Supporting Member

    Unless you know what you're doing, messing with the exhaust could easily decrease performance.
     
    Dan Groves likes this.

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