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Thread: KLX250S (EFI) Big Bore Kit

  1. #21

    Re: KLX250S (EFI) Big Bore Kit



    I believe that the Dobeck and Juice box are the same item, tried the Juice Box and it wasn't a real sucess.

  2. #22

    Re: KLX250S (EFI) Big Bore Kit



    Quote Originally Posted by Tom Forde View Post
    Hi all, with all this high tech performance, what are you using your KLX's for?
    By the sound of it, it is fast hard core low and mid range dirt riding or motard racing?

    If so, fuel range isn't an issue. (you probably take it to your designation on the back of a pickup.)
    If you intend to do some travelling you have a real problem, no one is manufacturing a larger fuel tank for the fuel injected KLX at the moment.
    This is because of the metal pressured tank and built in pump, which incidently weighs in at 5kg empty, and costs 7000bht and 8000bht respectively.
    So you may need to carry additional fuel on your rear rack.
    Tom, fuel not an issue, pleanty of road side shops selling fuel, even in the middle of the jungle . Depending on the riding can achive over 120 km's per tank.

  3. #23
    Revered Old Git mikerust's Avatar
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    Re: KLX250S (EFI) Big Bore Kit



    Quote Originally Posted by KLX331 Crazy View Post
    I believe that the Dobeck and Juice box are the same item, tried the Juice Box and it wasn't a real sucess.
    Yes Juice Box is manufactured by Dobeck.

    The "big bore" KLX version is "new" having been developed using a Kustom Kraft kit. My understanding is that it is a KLX unit reprogrammed to be adjustable to suit the 331 kit. It will not work on a stock 250 KLX.
    If you have a stock KLX unit you can send it back to Dobeck to be programmed for a 331 or vice versa. As they made the Juice Box it maybe true for a Juice Box as well.

  4. #24
    Biker Legend Tom Forde's Avatar
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    Re: KLX250S (EFI) Big Bore Kit



    Sorry KLXcrazy, fuel is an issue, I have done alot of km's in LOS if you use the KLX for what is designed for the quality of the 'fuel' out of 44 gallon drums will be a lottery.
    With your fuel injection bad fuel will really play up with your filters and minimum gas rating.

    A few years ago I rode from OZ and the Chinese boarder and return.
    My fuel injected BMW only had problems in small towns with 44gal. drums with pumps or beer bottles full of 'petrol'.

    Best of luck on you 100-150km fuel stops. Especially with a hotted up motor, even less km's/km.
    Slow cars that we pass, we call idiots. Fast cars that pass us, we call maniacs.

  5. #25

    Re: KLX250S (EFI) Big Bore Kit



    Gents, just a bit more information with the installation of the PCV and AutoTune units. Initially had a major problem with the bike hesitating and running ruf just off idle, thought that it was the PCV unit that was causing the issue. Found out after much thought and experimenting that it was actually the throttle position sensor that was causing the issue. The standard setting allows the butterfly to open without injecting fuel thus the bike leans off and in some cases will actually stall. Just adjusted up the sensor, so when the throttle is openen of the stop then fuel is injected, everything works perfect.

    This is a common problem that I see with many KLX riders, bike stalls when coming off idle, check the throttle sensor adjustment and this will fix the problem. I used the PCV and software for adjusting the sensor but others may have to get a proffesional to check the adjustment on there bike.

    Cheers and good riding.

  6. #26
    Leader of the Pack alrikki's Avatar
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    Re: KLX250S (EFI) Big Bore Kit



    Quote Originally Posted by mikerust View Post
    Yes Juice Box is manufactured by Dobeck.

    The "big bore" KLX version is "new" having been developed using a Kustom Kraft kit. My understanding is that it is a KLX unit reprogrammed to be adjustable to suit the 331 kit. It will not work on a stock 250 KLX.
    If you have a stock KLX unit you can send it back to Dobeck to be programmed for a 331 or vice versa. As they made the Juice Box it maybe true for a Juice Box as well.
    Did it have to be sent to USA or can it be reprogrammed in thailand? My juicebox looks similar to the dobeck one
    Sheep Rider

  7. #27
    Revered Old Git mikerust's Avatar
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    Re: KLX250S (EFI) Big Bore Kit



    Quote Originally Posted by alrikki View Post
    Did it have to be sent to USA or can it be reprogrammed in thailand? My juicebox looks similar to the dobeck one
    I can but ask.

    Yes it will have to go back to US.

    Technically Juice Box is a "private label" and under a private label agreement tech support is the responsibility of the vendor in this case TB.

    IF Dobeck are willing to do it there maybe a small charge.

  8. #28
    Revered Old Git mikerust's Avatar
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    Re: KLX250S (EFI) Big Bore Kit



    Reprogramming is at no cost but the unit must be returned to the US. You may either do that yourself or for a 100B or less you may EMS it to me and I will look after it and let you know the cost.
    Please remember that once reprogrammed to run correctly on a 331 kit it will not function as designed anymore on a stock 250.
    Last edited by mikerust; 17th April 2012 at 03:01 PM.

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