A governor, or speed limiter,

Discussion in 'Motorized Bicycle General Discussion' started by pnz, Sep 10, 2009.

  1. pnz

    pnz New Member

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    I would like to put a governor, or speed limiter, on my engine does anyone have any good idea's how to make A governor, or speed limiter. Wish it could be a switch. The only other way I could come up with is inside the throttle linkage like a nylon bushing. What is your idea?



    .duh.
     
    #1 pnz, Sep 10, 2009
    Last edited: Sep 10, 2009
  2. silverbear

    silverbear The Boy Who Never Grew Up

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    Hello there,
    I have no idea to help you with. Why not just give it less gas at the throttle? What kind of motor are you using? I'm just curious why you want to go slower. It is kind of refreshing in a way, since almost everybody here wants to go faster. For myself I'm pretty happy going 20-25mph and approaching an incline to goose it to 30 to help make it up to the top without peddling. If I couldn't give it full throttle I wouldn't make it up the hills around here.
    Silverbear
     
  3. chrisme

    chrisme New Member

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    A rev limiter of some sort, either ignition or gas, wouldn't help over-revving due to going down a steep hill. Which is more likely to hurt the engine due to running lean at low throttle. And there isn't really much you can do about it besides be careful to pull in the clutch coasting down hill.
     
  4. pnz

    pnz New Member

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    I want to regulate the speed for younger riders. But then maybe they should stay on there big wheels.
     
  5. Kevlarr

    Kevlarr New Member

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    I'll bet someone could come up with a circuit to interfere with the signal to the CDI at a certain RPM, sort of how rev limiters work on cars. You hit a pre-set RPM and it scrambles the signal to the CDI until your RPMs drop back down below the limit.
     
  6. chrisme

    chrisme New Member

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    Rev limiters on cars are a fuel cut. But yes, you have the right idea.
     
  7. fall_down_stand_up

    fall_down_stand_up New Member

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    I thought it had something to do with your signature,There is not a beer that my lips cannot resist hahahaha....Drink much????lol
    John-John
     
  8. pnz

    pnz New Member

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    Yes it is, if I am going to fast I may pass a brewery and may not be able to stop.
     
  9. 2door

    2door Moderator
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    That got a giggle from me....thanks. Back to your question; you could adjust your throttle cable so that it would not pull the slide as far. That would be simple but not as convenient as your idea of a switch. Obviously it would require an adjustment whenever the youngsters would ride. Possibly there are some electronic gurus out there who could design such a thing as a rev limiter for a Chinese 2 stroke...but it ain't me. I suppose if I were faced with your problem I'd look at designing a manual device to attach to the twist grip throttle to limit how far it could be twisted. It could be easily attached and removed at your preference. Just my thoughts.
    Tom
     
  10. pnz

    pnz New Member

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    Cheers everyone now off to slumberland along with the swill my braincells are stroming on all kinds of ideas. Remember this stouts for you, or it was till I drank it, sorry.
     
  11. fall_down_stand_up

    fall_down_stand_up New Member

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    If you look at my username,you being a drinker and all,you will understand why I use it....laff
     
  12. Kevlarr

    Kevlarr New Member

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    Problem with limiting your throttle is you'd lose power everywhere, you'd cripple your low and mid range which you need to climb hills or take off. By limiting the RPM though the CDI signal you'd still have all the power just no top end speed.

    Bet my buddy over at Michigan State could come up with something but that would mean giving up my engine and that ain't happening 'till winter. lol
     
  13. pnz

    pnz New Member

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    No, not a drinker I had to stop that, people waiting in the car. I am a guzzler. my signature should say there is no beer safe around these lips aahhhhhhhhhhh.
     
  14. jimraysr

    jimraysr New Member

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    My understanding is that they put choke plates in the intake manifold below the carb. in taxies in Chicago in the 30s - 40s. Somebody was saying they would get on a high hill get up as much speed as possible, push in the clutch and let gravity do its thing, then pop the clutch to suck the thin metal plate into the manifold ( and no further ? ). So the suggestion is an intake gasket with a small hole?

    Jim
     
  15. AslansMonkey

    AslansMonkey Member

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    Here's an idea...

    Please excuse the crudity of my drawing. It's late and I'm tired...

    Take your throttle apart (just the cover that clamps it to the bar) and you'll see the guide that the cable goes into. Somewhere past where the cable connects drill a hole through the throttle side to side. Then insert a pin through there (use something thick like a piece of wire hanger.

    Locate a spot along the lower housing that you can drill a hole and insert a screw so that when the throttle is rotated, the pin will hit the screw and prevent the throttle from turning further.

    Take the screw out when you wish to drive unlimited.

    Disclaimer...I just thought this up and have NOT tried this myself...though if my 15 year old goes screaming past the cops one more time I might just consider it!
     

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  16. Dan

    Dan Staff
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    That is a cool thought AM. Really, that will work.

    I was going to suggest a big 'ol rear sprocket as a thought. But then you have a slow but great hill climber.
     
  17. pnz

    pnz New Member

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    "AslansMonkey Speed Limiter" -Patent Pending-

    Great Idea, You could use a knurled thumbscrew with a e clip on the inside to keep it from vibrating out.




     
  18. xlite

    xlite New Member

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    Or simply remove the ring on the cable adjust on top of carb. Slide will now only go part way up.
     
  19. Flameout

    Flameout New Member

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    Or put right sized ball bearing on top of slide in carb and put cap back on. That would
    limit the upward motion of the slide.
     
  20. Outrunner

    Outrunner New Member

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    The throttle stop screw was common on all of the British bikes from the 50"s
    and into the 70's. There is a adjustable screw and lock nut to limit the amount
    of throttle position at wide open throttle
     

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