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Pinned How to Clean Your Carbies on a Kawasaki ZXR250C

Discussion in 'Kawasaki 250cc In-line 4's' started by kiffsta, Mar 6, 2012.

  1. Frankster

    Frankster See the World before you leave it Staff Member Premium Member Ride and Events Crew

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    Syncing carbs is when you make sure the butterflies of all the carbs open and shut at exactly the same time. It basically means the bike will rev cleaner and return to idle quicker and it will idle smoother. The issue with syncing is that it must be done when the engine has been warmed up. On the ZXR, the adjustment screws are hard to get to, so wear something on your hands to avoid being burnt. This video is dealing with another bike, but inline fours like yours are all fairly similar. You sync the carbs in pairs...1&2 + 3&4 and then you balance those pairs to each other. Other inline fours may have a different process, but that is the correct procedure for the ZXR250A. I know, I've done it many times.

     
  2. Ryan Luke

    Ryan Luke Member

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    Awesome Frank.

    Thanks, I did watch this exact video before actually, after you mentioned it. I will get myself a sync tool after cleaning carbies and replacing broken things.

    I'm half way through cleaning the bowls on the carbie. I've noticed half my head gasket seals are broken. Bowl gaskets are intact but head seals are broken. Worth replacing?
    I'm also oddly enough missing a screw on my second carbie. I'll post a picture in the reply.
    And lastly, my seat took a beating while using pliers removing it. Does this matter? will also post a picture.
    Thanks.
     
  3. Ryan Luke

    Ryan Luke Member

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    91002924_501968917149119_1317836493447757824_n.jpg 91113728_3734630059940914_4598672770031681536_n.jpg 90377900_1230748327134089_2997540796380479488_n.jpg 90819832_659952508169621_7459065274851917824_n.jpg 91022276_232759717842403_4413827569569234944_n.jpg 91270997_195921198375311_2965068043304042496_n.jpg
     
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  4. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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  5. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

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    I think you might need to replace that seat, would be easier than fixing it
    But you might be able to straighten it ,then carefully use a drill press with the vise clamped down to the table and with the seat in it, and drill it out to the original size, so the needle move's freely like it did but don't drill all the way to the bottom
    I reckon it will still be a bit squashed in on the side's after fixing it, but it may get you out of trouble.
    Find a drill bit that fit's into one of the other seat's, big enough so it just fit's in and use that
     
  6. Ryan Luke

    Ryan Luke Member

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    @GreyImport I didn't notice that honestly, thought it was factory. Might have to buy one of those.
    You are correct!
    Strange how it is missing that.

    @my67xr Yeah one of the other seats got pretty destroyed, it felt like it was stuck like glue.
    Will definitely get 2 replacement seats, if not 3.
    I'll have a look for where I can get those, shouldn't be too hard.

    I just have a feeling I have a vacuum leak somewhere, easiest way to check? Simple fix I'd imagine, just install new lines.
     
  7. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Did u read those 3 links I posted?

    First is where u can get replacement seals/o rings

    Second one explains about JIS and the third tells u where to buy the seats .... I would get 4 new ones as u get new needles with them ... which are more than likely in need of replacing .... and no u cant tell how good the rubber tip is going to seal with your eye or your finger
     
  8. Ryan Luke

    Ryan Luke Member

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    Yeah thanks, I saw that. I would need a filter as well. Any idea if that would come with one?
    One of my filters is a little broken.
     
  9. Ryan Luke

    Ryan Luke Member

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    Could I instead of worrying about the fuel filter, put an inline fuel filter in instead?
    I know it's just a wire mesh, but i'd prefer my carbs to all be the same, not 1 missing a fuel filter.
     
  10. Frankster

    Frankster See the World before you leave it Staff Member Premium Member Ride and Events Crew

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    Ryan, that screw isn't missing. There are normally only 3 screws holding the choke bar on. It does look like the 2nd from the right screw should be where you arrow is pointing because there is a washer behind the bar in the vacant hole. Make sure there is a washer behind the bar and one in front of the bar where ever there is a screw.

    You seats are stuffed, but the Litetek O-ring and the domed filter can be reused. The dome filter pops off.

    JIS screwdrivers are a must on Jap bikes. I have the following set in my toolbox at all times. Covers nearly all eventualities.

    Screw.JPG
    JIS.JPG
     
    • Informative Informative x 1
  11. Ryan Luke

    Ryan Luke Member

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    Ah Okay, yeah there isn't a washer there. I will get that when I can.

    Yep I think I'll go ahead and just buy 4 new seats + needles. I'll re-use the filters, not sure if I can buy new filters but 3 out of the 4 of my filters are good, one is just a little bit mangled but it will serve it's purpose.

    Yeah I could see how that is very helpful, thanks mate I'll pick one of those up.
     

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