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Thread: speed limiter removal

  1. #1
    Join Date
    Mar 2003
    Location
    Sacramento Ca
    Posts
    36

    speed limiter removal

    Anybody know how to remove the speed limiter from the clutch to allow this bike to go faster?
    08 KFX450
    04 TRX450R
    01 TRX400EX

  2. #2
    Join Date
    Mar 2004
    Location
    Washington IN
    Posts
    278
    I think it is in the front variator. I am getting ready to remove mine also but haven't had time. Please post if you have any luck.

    If you have the two stroke there is also a restrictor in the carb that doesn't allow it to open all the way.
    2001 Yellow 400EX
    1997 DR350SE Motorcycle
    2005 Eton Viper 70-son
    2003 Arctic Cat 90-daughter

  3. #3
    Join Date
    May 2008
    Location
    midwest city , ok
    Posts
    155
    just done this on a dvx 50 and it worked great, no loss of bbottom end and tons more speed, i also went to a smaller rear sprocket. its very easy mod.
    2008-2009 AMP Outlaw winternationals series champion in flattrack and tt 450 and open class.

    would like to thank all my sponsors:
    A and A yamaha, Baker Boys Yamaha, able racing, bobby lewis at state farm insurance

  4. #4
    Join Date
    Jun 2008
    Location
    Central California
    Posts
    2
    Originally posted by asohagan
    just done this on a dvx 50 and it worked great, no loss of bbottom end and tons more speed, i also went to a smaller rear sprocket. its very easy mod.
    I have a 2004 DVX 50 and wanting to do the same,

    What tooth on the rear sprocket and what did you do for more speed?

  5. #5
    Join Date
    May 2008
    Location
    midwest city , ok
    Posts
    155
    you can do this and get more speed without changing sprockets.

    all you have to do is pull off the cover on the left side of the bikes engine and then remove the nut on the front belt drive pulley. behind that nut there will be a spacer that is about .5 inch or less thick, simply remove it and put it all back together. process done
    you just gave the bike about 5-7 more mph and you will gain another 3-5 by changing rear sprockets to a smaller one i will count the teeth on my new one and let you know.

    taking the baffle out of the exhaust really helps to and it doesnt make it that much louder.
    2008-2009 AMP Outlaw winternationals series champion in flattrack and tt 450 and open class.

    would like to thank all my sponsors:
    A and A yamaha, Baker Boys Yamaha, able racing, bobby lewis at state farm insurance

  6. #6
    Join Date
    Jun 2008
    Location
    Central California
    Posts
    2
    Originally posted by asohagan
    you can do this and get more speed without changing sprockets.

    all you have to do is pull off the cover on the left side of the bikes engine and then remove the nut on the front belt drive pulley. behind that nut there will be a spacer that is about .5 inch or less thick, simply remove it and put it all back together. process done
    you just gave the bike about 5-7 more mph and you will gain another 3-5 by changing rear sprockets to a smaller one i will count the teeth on my new one and let you know.

    taking the baffle out of the exhaust really helps to and it doesnt make it that much louder.
    Thanks ashanga,

    I'll try it this weekend,

  7. #7
    Join Date
    Nov 2007
    Location
    Missouri
    Posts
    1,821
    Here, this should work with the Arctic Cat/Kymco/and the new KFX 50'S

    http://s298.photobucket.com/albums/m...k/blaster/cvt/
    OXC #247
    2011: Scott Optics, Hinson Racing, HRP Sports, DeRisi Racing, Houser Racing, HiPer , Rath Racing, MSR........................

    HAULIN DONKEY RACING !!!

  8. #8
    Join Date
    May 2008
    Location
    midwest city , ok
    Posts
    155
    thanks for that pic, i cant do photobucket from work
    2008-2009 AMP Outlaw winternationals series champion in flattrack and tt 450 and open class.

    would like to thank all my sponsors:
    A and A yamaha, Baker Boys Yamaha, able racing, bobby lewis at state farm insurance

  9. #9
    Join Date
    May 2008
    Location
    midwest city , ok
    Posts
    155
    thanks for that pic, i cant do photobucket from work
    2008-2009 AMP Outlaw winternationals series champion in flattrack and tt 450 and open class.

    would like to thank all my sponsors:
    A and A yamaha, Baker Boys Yamaha, able racing, bobby lewis at state farm insurance

  10. #10
    Join Date
    Mar 2007
    Location
    Indiana
    Posts
    465
    "I think it is in the front variator. I am getting ready to remove mine also but haven't had time. Please post if you have any luck.

    If you have the two stroke there is also a restrictor in the carb that doesn't allow it to open all the way." 47501exracer


    How do you remove the restrictor from the carb?
    Retired

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