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Thread: removing the 180kmph restrictor on jap imports

  1. #21
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    Default Re: removing the 180kmph restrictor on jap imports

    Quote Originally Posted by gixerkiller View Post
    is your bike A JAPANESE IMPORT???

    if not you will need to figure out what wire does what.

    WIRE COLOR CODES ARE NOT THE SAME REGION TO REGION

    THIS MOD IS FOR JAPANESE IMPORTED BIKES ONLY!!!!!

    all others are different BE SURE YOU HAVE THE RIGHT BIKE BEFORE DOING THIS MOD PEOPLE

    WHO KNOWS WHAT COULD HAPPEN, BURNED CDI, BURNED COILS, BURNED STATOR? all are expensive so check your vin before you cut.
    Yes! I purchase this bike locally , but previous ower said this was import from japan. In the begining before my purchase this bike was ok,(rev very well) when i asked to previous owner about this condition he said that its Igniter was burnt out so he replaced with a new one from same bike. for your observation i am attaching wire layout which match with my bike colour codes.

  2. #22
    gixerkiller
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    Default Re: removing the 180kmph restrictor on jap imports

    Quote Originally Posted by shahidmajeed View Post
    Yes! I purchase this bike locally , but previous ower said this was import from japan. In the begining before my purchase this bike was ok,(rev very well) when i asked to previous owner about this condition he said that its Igniter was burnt out so he replaced with a new one from same bike. for your observation i am attaching wire layout which match with my bike colour codes.
    you trust the previous owners word?

    ALL BIKES COME FROM JAPAN THIS DOES NOT MEAN IT IS AN IMPORT

    A JAPANESE IMPORT IS A BIKE THAT WOULD BE SOLD ON THE STREETS OF JAPAN

    not one that was built FOR EXPORT WHICH WOULD MAKE IT AN IMPORT IN ANY OTHER COUNTRY

    THE VIN NUMBER WILL TELL YOU IF IT IS A JAPANESE MODEL OR NOT
    if the parts are not the same then YOUR BIKE IS MOST LIKELY NOT A J SPEC BIKE.

  3. #23
    Moderator gothy's Avatar
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    Default Re: removing the 180kmph restrictor on jap imports

    Im not 100% but im sure they only offered this particular cb400 in japan anyway. Regardless Gixer is offering EXTREMELY good advice here

    People fitting this mod to clear the 5500rpm misfire you get when a wire is damaged, should note YOU NEED TO REALLY REPLACE THAT BROKEN WIRE. It misfires because it cuts the power on one of the coils at 180kph.

    The original function of the misfire was to stop the bike from reaching over 180kph, but they wired it so you cant remove the limiter easily by just removing the plug behind the speedo, because doing that makes the 5500rpm misfire you describe.
    Of course once the wiring gets damaged in the loom/speedo, then you will get this misfire at 5500rpm instead of 180. Because the bike thinks your disconnecting the speedo wiring, hence it would be better to replace the wire before fitting the "mod".
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  4. #24
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    Default Re: removing the 180kmph restrictor on jap imports

    Quote Originally Posted by gothy View Post
    Im not 100% but im sure they only offered this particular cb400 in japan anyway. Regardless Gixer is offering EXTREMELY good advice here

    People fitting this mod to clear the 5500rpm misfire you get when a wire is damaged, should note YOU NEED TO REALLY REPLACE THAT BROKEN WIRE. It misfires because it cuts the power on one of the coils at 180kph.

    The original function of the misfire was to stop the bike from reaching over 180kph, but they wired it so you cant remove the limiter easily by just removing the plug behind the speedo, because doing that makes the 5500rpm misfire you describe.
    Of course once the wiring gets damaged in the loom/speedo, then you will get this misfire at 5500rpm instead of 180. Because the bike thinks your disconnecting the speedo wiring, hence it would be better to replace the wire before fitting the "mod".
    finally last night I linked resistance bewtween two wire in the connector behind the speedo without caring what will demage by doing this, but no luck.
    inside speedo case i just found one connector of three wires(Green in middle) without linked to anything(Stayed Alone without any sensor or link with speedo connection)however i linked resis between two wires but bike never made any difference(Still Engine Sound like "BBRRRRRRRR" at just 5K rpm to 6K rpm then it become ok at 6500 RPM)
    Looking carefully now at engine and chasis i found ENGINE#NC23E while Chassis#NC31 (this is strange)I think my new ECU is not matching with my engine attitude.

  5. #25
    Moderator gothy's Avatar
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    Default Re: removing the 180kmph restrictor on jap imports

    yeah thats the right combination of engine and chassis numbers.

    BUT you said there is a connection in the speedo, that isnt connected.
    This is your problem, the wires needs replacing/reconnecting.
    There is a photo of the block connector in this post. (THREAD)
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    Default Re: removing the 180kmph restrictor on jap imports

    Quote Originally Posted by gothy View Post
    yeah thats the right combination of engine and chassis numbers.

    BUT you said there is a connection in the speedo, that isnt connected.
    This is your problem, the wires needs replacing/reconnecting.
    There is a photo of the block connector in this post.
    There was nothing attached to your post...? Did you mean thread?
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  7. #27
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    Default Re: removing the 180kmph restrictor on jap imports

    i most certainly did lol
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  8. #28
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    Default Re: removing the 180kmph restrictor on jap imports

    Quote Originally Posted by gothy View Post
    yeah thats the right combination of engine and chassis numbers.

    BUT you said there is a connection in the speedo, that isnt connected.
    This is your problem, the wires needs replacing/reconnecting.
    There is a photo of the block connector in this post. (THREAD)
    Now what i do now? Male connector is available inside meter(coming from wiring loom) while female connector is NOT available which should goes inside speedo(Plastic body)
    Should i connect resistance 1st in speedo male connector and 2nd at the ignition unit too is it? please guide.
    there is no female connector going inside speedo so no need to worry abt it becoz after mod it has to be disconnect from meter? see pic if i am right

  9. #29
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    Default Re: removing the 180kmph restrictor on jap imports

    yeah you've got it
    make sure there is a resistor in the circuit though.
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  10. #30
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    Default Re: removing the 180kmph restrictor on jap imports

    Quote Originally Posted by gothy View Post
    yeah you've got it
    make sure there is a resistor in the circuit though.
    HI, due to very hard fever i could nt modify this last week. Yesterday night i did this setup cut yellow/blue(strip) wire and installed resis at CDI & connector behind speedo meter by solder. when i start my bike i noticed that was running on just two cylinders (2-3) while cylinders (1-4) was not firing.so no luck then i have no choice just to reconnect those wires again and start bike again with same result bubbling at 5K RPM.
    The wire Yellow/blue goes where? mine goes straight to ignition coil # 1-4.
    Please think abt my problem.regards

  11. #31
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    Default Re: removing the 180kmph restrictor on jap imports

    Quote Originally Posted by gothy View Post
    yeah you've got it
    make sure there is a resistor in the circuit though.
    CDI CONNECTOR

  12. #32
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    Default Re: removing the 180kmph restrictor on jap imports

    PROBLEM SOLVED
    THANKS YOU ALL SPECIALLY "GOTHY"

    REGARDS
    SHAHID

  13. #33
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    Default Re: removing the 180kmph restrictor on jap imports

    Is there a specific minimum wattage for the resistor used?

  14. #34
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    Default Re: removing the 180kmph restrictor on jap imports

    Quote Originally Posted by joajas View Post
    Is there a specific minimum wattage for the resistor used?
    Good Intresting Question ? Yes I used 0.5 watt for it Although i 1 watt can be used but why use big one when a tiny can do better hope this is answer

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    Default Re: removing the 180kmph restrictor on jap imports

    Can post picture again cannot see it ?
    Thanks




    Quote Originally Posted by shahidmajeed View Post
    Good Intresting Question ? Yes I used 0.5 watt for it Although i 1 watt can be used but why use big one when a tiny can do better hope this is answer

  16. #36
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    Default Re: removing the 180kmph restrictor on jap imports

    I have a problem on my newly purchases cbr600 f4i. I'm not sure if it's a Jap import because the bike will go over the 180kmph limit but the speedo can't display over 180kmph.

    At the weekend I tested it out against my friends speedo, according to his speedo we went to 220kmph (private road of course) but my speedo stopped dead st 180kmph.

    Can anyone help me to find out what is causing this strange problem?

  17. #37
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    Default Re: removing the 180kmph restrictor on jap imports

    I'm going out on a limb here, because I have NIL personal experience with restricted bikes.

    But I think I remember a thread a long time ago (Edit: yeah, it's this thread, hahaha) about people defeating the speed limiter that is located within the speedo by not allowing the needle to reach the point where an electrical contact is made and the limiter kicks in.

    So if you do remove the mechanical stop on the needle, and the speedometer is able to indicated higher speeds, the limiter will kick in.

    I guess you have to decide if it is better for you to have the theoretical possibility of a high speed being indicated on your speedo, or to actually travel at a high speed. My choice would be the latter
    Last edited by ghbzorro; September 30th, 2016 at 06:01 AM.

  18. #38
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    Default Re: removing the 180kmph restrictor on jap imports

    I read the needle related thread but my speedo is a digital one so I'm guessing mine won't have a needle.

    Because I'm in Asia at the moment and my F4i has always been in Asia, I have a funny feeling my bike was originally a USA bike because it has American stickers inside, but I know the guy who owned the bike before me swapped the speedo gauge with another one, so maybe he swapped it out for a speedo gauge from Japan meaning it is unable to show anything above 180kmph.

    Would you agree on my theory?

  19. #39
    RRzone Elder ghbzorro's Avatar
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    Default Re: removing the 180kmph restrictor on jap imports

    Frankly. I have not one clue.

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    Default Re: removing the 180kmph restrictor on jap imports

    Quote Originally Posted by gothy View Post
    Disc inside the speedo. 1st pic

    HOW IT WORKS;
    1. Basically the first way fools the speedo into thinking your doing km when your doing mph, and since not many bikes are going to go faster than 180mph the converter is a good option for derestricting it.

    2. This fools the circuit into thinking the disk hasn't spun to 180 and completed the circuit in the speedo.

    3. Without the disk it cannot complete the circuit, thus the bike thinks its traveling slower than 180kmh.

    IS YOUR BIKE RESTRICTED?
    Its easy to find out how.
    In other bikes or a faired version its the dash fuse.
    Just remove the fuse for (its 1 fuse mine is a 10Amp);
    "meter, tail light, horn, turn, stop light, neutral light, hazard".

    Then ride the bike, carefully!
    remembering you have no indicators, no rear lights, no neutral light, no horn.

    It should misfire at 5500 RPM, and believe me its noticeable.
    If it doesn't misfire your bike has been derestricted already.

    fusebox, its the missing fuse. pic 2

    i just joined this forum, i have a jap bike that has the limiter, but im blocked from viewing the images here.what to do now?

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