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Power restrictions

Discussion in 'XJ Modifications' started by Jackohelp, Aug 11, 2016.

  1. Jackohelp

    Jackohelp Member

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    Is there a power restrictor mod for the xj700maxim ?
    What is the power of the xj700maxim?
    What is the power to weight ratio of the xj700maxim?

    Thanks
     
  2. micheal wade

    micheal wade Member

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    Power restrictor mod? Idk if there is one. dont start it thats a great way to restrict the power
    A 1985 xj700 has 86hp and 45.6
    Power to weight ratio is
    0.171hp/lb
    All that is according to google
     
  3. MiGhost

    MiGhost Well-Known Member

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    The only way to restrict power would be smaller carbs, or lower lift cam.
    Neither of which I am aware of.

    There is always a smaller engine swap to a 650 for a lower power option.

    I'm guessing first bike, and a learners license?

    ~Ghost
     
  4. micheal wade

    micheal wade Member

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    45.6 ft-lbs torque
     
  5. mlew

    mlew Well-Known Member

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    The power restrictor is the thing on the right side handlebar that you grab with your hand . Its called a throttle, don't twist it so much.
     
  6. hogfiddles

    hogfiddles XJ-Wizard, Host-Central NY Carb Clinic Moderator Premium Member

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    There's TWO of them there---the other is the black lever that you grab and pull
     
  7. Toomanybikes

    Toomanybikes Well-Known Member

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    Is it a Maxim "X" model has 86hp but air cooled one is less
    .You could use an electronic rev limiter to keep a new rider from going throttle happy ! The other way it to put a small piece of pipe into top of throttle slide to restrict the full vertical travel.
     
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  8. Jackohelp

    Jackohelp Member

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    Thanks for all the smart arse comments.

    I asked because a new rider on a restricted license wanted to buy my bike, only if there was a restrictor kit for it to pass UK law


    It looks like I'll have to keep it for now :)
     
  9. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Three power restrictors really (besides the two mentioned above).

    Run it past redline for an extended period of time. A valve will drop and you will have a 100% power reduction.
    There are no governors of any sort on motorcyles of this era.

    The only way that I know of to lower the power is to insert restrictor plates between the carb abd the intake. Those you'd have to fabricate, and I don't think you'd limit power enough to make it legal for a learner's license.
     
  10. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    I wouldn't reccomend that one. Too much risk of damaging the diaphragm.
     
  11. mlew

    mlew Well-Known Member

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    I would like to know more about that. Explain what a restricted license is and why you need to restrict the HP of a bike
     
  12. Polock

    Polock Well-Known Member

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    it would seem to me that someone would look in a book and say that X bike has Y horsepower and that would be that
     
  13. MiGhost

    MiGhost Well-Known Member

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    It is a UK reg. Meant to keep new riders away from big high powered bikes while they learn how to ride during the first year.
    Lower HP limits restrict the rider to smaller, easier to handle bikes as they develop their riding skills.

    ~Ghost
     
  14. mlew

    mlew Well-Known Member

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    Not a bad idea, how do they determine if a bike is too powerful ? Are they just looking at engine size? A xj700 is small and not a bad first bike.
     
  15. MiGhost

    MiGhost Well-Known Member

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    While I am not sure what the limits are. My understanding is that they use the power to weight ratio of the bike.

    ~Ghost
     
  16. Kickaha

    Kickaha Active Member Premium Member

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    Same way they do it here, but there is an approved list and nothing over 660cc
     
  17. a100man

    a100man Well-Known Member

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    I think the power limit for the 'base licence is aroun 46 BHP - popular low power bikes are Suzuki GS500 for example. For the OP I think you can get a restrictor kit for the XJ600 diversion (Seca 2). The bikes are plentiful and cheap a great first bike option IMO.

    OP note that this is chiefly a USA site, some explanation of why you you wanted to lower the power may have restricted the 'smart arse' comments :).
     
  18. mlew

    mlew Well-Known Member

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    [QUOTE="
    OP note that this is chiefly a USA site, some explanation of why you you wanted to lower the power may have restricted the 'smart arse' comments :).[/QUOTE]

    Agree.
    Would a simple throttle stop pass as a power restrictor? Some sort of fabricated device to limit the amount of throttle that can be applied.
     
  19. MattiThundrrr

    MattiThundrrr Not a guru

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    Less horsepower is not the American Way!
     
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  20. TheCrazyGnat

    TheCrazyGnat Well-Known Member

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    We prefer to go the other way.
    [​IMG]
     
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