/ Register

  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Discussion ZXR 250 Carb Slide Mod

Discussion in 'Kawasaki 250cc In-line 4's' started by venom80, Mar 4, 2014.

Page 2 of 2
  1. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

    Messages:
    6,400
    Likes Received:
    4,788
    Trophy Points:
    1,148
    Joined:
    May 4, 2013
    Gender:
    Male
    Occupation:
    Retired
    Location:
    Tamworth, NSW
    My Bike:
    1937 Royal Enfield 250, CF Moto 250 V5, Honda's XL250, CBR250, FT500 plus a few others.
    It will, but you may have to go to a heavier spring if that happens.
     
    • Like Like x 1
    Murdo, Mar 8, 2014
    #21
  2. zixxer

    zixxer Well-Known Member

    Messages:
    457
    Likes Received:
    171
    Trophy Points:
    248
    Joined:
    Jan 26, 2014
    Gender:
    Male
    Location:
    Sydney, Australia
    My Bike:
    zxr250
    mmmmm this little mod plus a quick action throttle sounds like fun

    i have seen some for sale but they have throttle cables aswell, not sure if they will fit, also saw a throttle grip for a zxr750 that is described as a quick turn but its a genuine kawasaki part and doesnt look any different from the stock tube i have now.
     
    • Like Like x 1
    zixxer, Mar 11, 2014
    #22
  3. ajverma

    ajverma Active Member Premium Member

    Messages:
    99
    Likes Received:
    30
    Trophy Points:
    188
    Joined:
    Aug 18, 2011
    best take your tube to a wrecker and let them match it... otherwise you'll be hunting for a while
     
    • Like Like x 1
    • Informative Informative x 1
    ajverma, Mar 11, 2014
    #23
  4. zixxer

    zixxer Well-Known Member

    Messages:
    457
    Likes Received:
    171
    Trophy Points:
    248
    Joined:
    Jan 26, 2014
    Gender:
    Male
    Location:
    Sydney, Australia
    My Bike:
    zxr250
    decided to go and get a zx10r throttle tube from an 06, would recommend it, for 20 bucks you cant go wrong.

    doesn't make a massive difference but definitely a shorter turn than the stock tube.
     
    • Like Like x 2
    zixxer, Mar 28, 2014
    #24
  5. Tim_

    Tim_ resident nutcase Contributing Member Dirty Wheel Club

    Messages:
    1,337
    Likes Received:
    662
    Trophy Points:
    543
    Joined:
    Jan 8, 2014
    Gender:
    Male
    Location:
    In your bike shed
    My Bike:
    Modified 1990 Honda MC22 CBR 250RR
    Speaking of throttle mods. I'm not a fan of the throttle being in the switch block. And I have a cbr throttle and cables. Has anyone ever tried to put a cbr throttle on a zxr so the throttle is separate from the switch block?
     
    Tim_, Mar 28, 2014
    #25
  6. Phil

    Phil Senior Member Contributing Member

    Messages:
    3,613
    Likes Received:
    1,549
    Trophy Points:
    923
    Joined:
    Aug 8, 2010
    Gender:
    Male
    Occupation:
    M C E
    Location:
    Sunshine Coast Qld
    Home Page:
    My Bike:
    Suzuki GT250X7 Kawasaki ZZR600
    Just a question Tim, why the dislike of the throttle cable in the switch block???????
     
    • Like Like x 1
    Phil, Mar 28, 2014
    #26
  7. Tim_

    Tim_ resident nutcase Contributing Member Dirty Wheel Club

    Messages:
    1,337
    Likes Received:
    662
    Trophy Points:
    543
    Joined:
    Jan 8, 2014
    Gender:
    Male
    Location:
    In your bike shed
    My Bike:
    Modified 1990 Honda MC22 CBR 250RR
    The switch block on my bike actually slides up and down. I would say the anchor hole is stretched. Also the concept seems odd to me. And it seems like there is a lot more pieces to mis place inside the switch block.
     
    Tim_, Mar 28, 2014
    #27
  8. kiffsta

    kiffsta Senior Member

    Messages:
    9,066
    Likes Received:
    6,872
    Trophy Points:
    1,168
    Joined:
    Aug 7, 2010
    Gender:
    Male
    Location:
    Brisbane
    there is a metal anchor on the backside of the switch block, you will need to remove the switch block from the bike, punch back in a bit and line it up with the hole in the handlebar, once its back in properly, it wont move
     
    Last edited: Mar 28, 2014
    kiffsta, Mar 28, 2014
    #28
  9. Tim_

    Tim_ resident nutcase Contributing Member Dirty Wheel Club

    Messages:
    1,337
    Likes Received:
    662
    Trophy Points:
    543
    Joined:
    Jan 8, 2014
    Gender:
    Male
    Location:
    In your bike shed
    My Bike:
    Modified 1990 Honda MC22 CBR 250RR
    Cheers kiffsta I will try that tomorrow.
     
    • Like Like x 1
    Tim_, Mar 28, 2014
    #29
  10. Phil

    Phil Senior Member Contributing Member

    Messages:
    3,613
    Likes Received:
    1,549
    Trophy Points:
    923
    Joined:
    Aug 8, 2010
    Gender:
    Male
    Occupation:
    M C E
    Location:
    Sunshine Coast Qld
    Home Page:
    My Bike:
    Suzuki GT250X7 Kawasaki ZZR600
    Well Chris got to you first, thought that might have been the issue. Pleased your sorted.:thumb_ups:
     
    Phil, Mar 28, 2014
    #30
  11. Frankster

    Frankster Grey Pride...Adventure before Dementia Staff Member Premium Member Ride and Events Crew

    Messages:
    4,009
    Likes Received:
    2,237
    Trophy Points:
    923
    Joined:
    Nov 19, 2013
    Gender:
    Male
    Occupation:
    Gardener
    Location:
    Tasmania
    Home Page:
    My Bike:
    Spada, VT250F & ZX2R
    Good work Venom. I was going to do this (second hole) mod to my drag bike as soon as the basics are sorted. I was going to start with 1mm and see what happened. Given you went to 2.5mm whitout any issues, I'll probably do the same. What the spring mod you're talking about?

    Frank
     
    Frankster, May 3, 2014
    #31
  12. zixxer

    zixxer Well-Known Member

    Messages:
    457
    Likes Received:
    171
    Trophy Points:
    248
    Joined:
    Jan 26, 2014
    Gender:
    Male
    Location:
    Sydney, Australia
    My Bike:
    zxr250

    would it affect air/fuel at all?
     
    zixxer, May 3, 2014
    #32
  13. Frankster

    Frankster Grey Pride...Adventure before Dementia Staff Member Premium Member Ride and Events Crew

    Messages:
    4,009
    Likes Received:
    2,237
    Trophy Points:
    923
    Joined:
    Nov 19, 2013
    Gender:
    Male
    Occupation:
    Gardener
    Location:
    Tasmania
    Home Page:
    My Bike:
    Spada, VT250F & ZX2R
    I don't know. The quicker the bike gets revved up, the quicker it gets in to the next gear and technically it should cover the 1/4 mile quicker. I wouldn't think this mod would have any affect on air/fuel as from what I understand that's metered by the carbs (I'm probably wrong!). The quicker the carbs open the quicker it should rev...right?
     
    Frankster, May 3, 2014
    #33
  14. venom80

    venom80 Loud pipes save live's

    Messages:
    48
    Likes Received:
    37
    Trophy Points:
    188
    Joined:
    Feb 15, 2014
    Gender:
    Male
    Location:
    Brisbane
    My Bike:
    1990 Zxr
    Thanks, no spring mod it was mentioned earlier in the post that if I go to big I might have to put a heavier spring in to stop the slid flapping around.

    Sent from my GT-I9300T using Tapatalk
     
    venom80, May 13, 2014
    #34
  15. natezx2r

    natezx2r Active Member

    Messages:
    6
    Likes Received:
    2
    Trophy Points:
    73
    Joined:
    Mar 24, 2014
    Gender:
    Male
    Location:
    Sydney, Australia
    My Bike:
    zx2r
    How did you go drilling out bigger than 2.5mm, Im doing mine to 2.5mm as I type
     
    natezx2r, Oct 2, 2014
    #35
  16. venom80

    venom80 Loud pipes save live's

    Messages:
    48
    Likes Received:
    37
    Trophy Points:
    188
    Joined:
    Feb 15, 2014
    Gender:
    Male
    Location:
    Brisbane
    My Bike:
    1990 Zxr
    Yeah good I've had no issues with the crabs since works really nicely
     
    venom80, Oct 2, 2014
    #36
  17. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

    Messages:
    4,737
    Likes Received:
    2,881
    Trophy Points:
    943
    Joined:
    Mar 18, 2014
    Location:
    Sydney NSW
    My Bike:
    FZR250R 3LN6
    Bumping this thread, I performed the mod to my C model today.

    Based on this thread and the ZXR400 instructions, I went with an additional 2.5mm hole next to the existing hole (also 2.5mm on my carbs).

    Results - improved throttle response when in the correct gear. However, if you are in a high gear at low speed and low rpm, I found that it would bog down and behave far worse than standard. I would say the perceived better performance is worth it.
     
    Linkin, May 5, 2018
    #37
  18. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

    Messages:
    5,108
    Likes Received:
    3,477
    Trophy Points:
    1,148
    Joined:
    Dec 23, 2012
    Gender:
    Male
    Location:
    Thailand
    Home Page:
    My Bike:
    Yamaha FZR400 3TJ1, Honda MC22
    Exactly as advertised and better than spending $80 on the "Sigma Racing Carb Kit" that gives you a piece of paper and a drill bit. :)
     
    • Like Like x 1
    maelstrom, May 5, 2018
    #38
  19. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

    Messages:
    4,737
    Likes Received:
    2,881
    Trophy Points:
    943
    Joined:
    Mar 18, 2014
    Location:
    Sydney NSW
    My Bike:
    FZR250R 3LN6
    I'm feeling positive as to the difference I'll feel when going for a fang - and yep, for the best price of zero dollars and some of my own time :)
     
    • Like Like x 1
    Linkin, May 5, 2018
    #39
  20. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

    Messages:
    4,313
    Likes Received:
    2,383
    Trophy Points:
    898
    Joined:
    Jun 18, 2016
    Gender:
    Male
    Occupation:
    Panel Beater, Spray Painter, Custom Fabricator
    Location:
    Adelaide, South Australia
    My Bike:
    Yamaha's , 1990 FZR250R 3LN3 , 1986 XT250TS 57R , 1984 IT200L 43G, 1976 IT400C 510
    I did mine around this time last year, drilled out the 2x 2mm hole's in each slide to 2.5mm
    I did feel a bit of difference to the response
     
    • Like Like x 1
    Last edited: Dec 27, 2018
    my67xr, May 5, 2018
    #40
Page 2 of 2

Share This Page