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Thread: Engine response at low revs.

  1. #16
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    Quote Originally Posted by avgas View Post
    How the hell do you fuck up a brand new bikes mix?

    If it aint broke......
    2009 post...2010 bike. Do you think OP just might have updated his bike in the interim?
    Do you realise how many holes there could be if people would just take the time to take the dirt out of them?

  2. #17
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    Quote Originally Posted by MSTRS View Post
    2009 post...2010 bike. Do you think OP just might have updated his bike in the interim?
    Too True
    So what was the original bike?
    Reactor Online. Sensors Online. Weapons Online. All Systems Nominal.

  3. #18
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    Pass. I'm not THAT clever...
    Do you realise how many holes there could be if people would just take the time to take the dirt out of them?

  4. #19
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    Sounds to me like there is a small bit of crap sitting under a neddle valve on a float bowl.

    What usually clears this is turning off the petrol and running the bike right out of gas, then turn the gas on the the crap is pushed into the float chamber.

    But then WTF would I know.
    Just another leather clad Tinkerbell.
    The Wanker on the Fucking Harley is going for a ride!

  5. #20
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    im not the op but i have a 20 year old bike..

    Im gonna have a go at dismantlementing the crabs im sure their will be some blockage in there somewhere. im pretty nervous about the process though. cos if i brake it i can't get to work

  6. #21
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    Quote Originally Posted by Ultrasonic2 View Post
    im not the op but i have a 20 year old bike..

    Im gonna have a go at dismantlementing the crabs im sure their will be some blockage in there somewhere. im pretty nervous about the process though. cos if i brake it i can't get to work
    Um - dare I say it? Leave them the fuck alone. Carbs should not be touched if you know nothing about them. That way lies tears.
    Someone who does know can surely help you?
    Do you realise how many holes there could be if people would just take the time to take the dirt out of them?

  7. #22
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    Quote Originally Posted by Ultrasonic2 View Post
    im not the op but i have a 20 year old bike..

    Im gonna have a go at dismantlementing the crabs im sure their will be some blockage in there somewhere. im pretty nervous about the process though. cos if i brake it i can't get to work
    If your happen to have an ultrasonic (excuse the pun) cleaner.....put (a safe) solvent in it and sit the carb in it.......worth gold
    Reactor Online. Sensors Online. Weapons Online. All Systems Nominal.

  8. #23
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    Also drain the float bowls, some times it works wonders.
    Just another leather clad Tinkerbell.
    The Wanker on the Fucking Harley is going for a ride!

  9. #24
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    Well i have the CARBs of thank god ( Seriously ) . And well i may have already found the problem. One of the slide carb covers only had one of the 4 bolts holding the cover on !

    Since i have them out i'll try and keep going to see if there are any blockages which is what i thought the issue. i'm gonna do a little blue printing too.

    By the way i have a 1992 ZXR 250

  10. #25
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    Unhappy

    right carbs out and back in again. There were no blockages at all, which i guess is a good thing.

    Went for a ride and it seems the issue hasn't be resolved

    i also made a mistake reasmbling the throttle so it looks like im gonna spend tomorrow taking it apart again. mybe i can just swap the cables around in the throttle instead.

  11. #26
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    uhh if hes talking about the ninja chugging it could just be the lack of engine torque.
    depends on the type of chugging.. is it full on shaking the bike (carb problem) or just the engine struggling with a 6th gear acceleration at 30-40k's?
    I asked God for a bike, but I know God doesn't work that way. So I stole a bike and asked for forgiveness.

  12. #27
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    Talking

    Quote Originally Posted by specter View Post
    uhh if hes talking about the ninja chugging it could just be the lack of engine torque.
    depends on the type of chugging.. is it full on shaking the bike (carb problem) or just the engine struggling with a 6th gear acceleration at 30-40k's?
    Well mine will chug in first great below 6,000 but not all the time . Also below 10,000 if i pull the throttle open it hesitates.
    The problem is wores the hotter the bike gets. Im sure if i run the bike with the choke on the problems isn't as bad. But with the choke out the bike is much slow up high.

    I've done a bit more resersh and im gonna loosen the pilot screw to let more fuel in. there was a post saying doing so made a massive difference to their bike ! So im gonna give that a shot . and to be honest a lean condition kinda makes sence so more fuel it is
    Dose anyone know if i add more fuel via the pilot screw withh this alos add more full to the top end 12,000 plus ?

  13. #28
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    The pilot screw sets the mixture at low revs/idle. Once the throttle is twisted more, the needles clear more of the main jets to increase fueling. You do know that you have 4 carbs? The problem may be in any or all of them.
    Sometimes the symptoms you describe can be caused by a coil breaking down under load, esp once warm.
    Or even just worn plugs.
    Last edited by MSTRS; 12th December 2010 at 09:22.
    Do you realise how many holes there could be if people would just take the time to take the dirt out of them?

  14. #29
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    I am also fucking astounded as to how you do this to a new bike? It is beyond me.

  15. #30
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    Quote Originally Posted by trademe900 View Post
    I am also fucking astounded as to how you do this to a new bike? It is beyond me.
    As, has been said before the bike is 20 years old not new ?

    oh and i was refering to your post here

    from here

    http://www.kiwibiker.co.nz/forums/sh...cing-the-carbs

    You will find the trouble is not getting hold of thevacuum gauge, but getting to the fucking adjusting screws!! You need a fucking expensive 90 degree bevel screwdriver for your ZXR250. I suggest you first find one of those!

    Another suggestion whilst you are working on the carbs is to adjust the pilot jet screws, it really makes a difference. My bike had an unsteady idle and hanged after blipping throttle, slowly returning down. I suspect a lot of ZXR's are like this... running lean on the pilot circuits. I just used trial and error taking off the carbs, adjusting them, refitting and eventually went from to 2.5 turns out (factory setting) to 3.5 (richer) and its got a nice pulsing idle and the revs drop nicely now!

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