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Info LexLuthors ZXR250c

Discussion in 'Kawasaki 250cc In-line 4's' started by LexLuthor, Aug 25, 2015.

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  1. LexLuthor

    LexLuthor Well-Known Member

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    I had one more question about the bike not related to the problem at hand. Is it normal for these bikes to fluctuate in engine temperatures so quickly? In stop start traffic my bike quickly heats up to a bit over halfway then the fan kicks in but as soon as i start riding again for a bit the temp hangs around a quarter of the way on the gauage. Wondering if this is normal because my bike gets bloody hot!!!

    Sent from my SM-G900I using Tapatalk
     
    LexLuthor, Oct 16, 2015
    #61
  2. Phil

    Phil Senior Member Contributing Member

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    It is normal in traffic for the temp to rise as air flow is nil. Once you hit the open road the air flow increases dramatically and hence brings the temp down.
     
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    Phil, Oct 16, 2015
    #62
  3. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    If the bike gets excessively hot (eg nearly in the redzone) quickly then you may have a head gasket problem. Check for bubbles in the overflow, or when the bike is cold, take off radiator cap and check for bubbles.

    Flush your cooling system with a hose and use fresh quality coolant. I use the red nulon stuff.
     
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    Linkin, Oct 16, 2015
    #63
  4. zixxer

    zixxer Well-Known Member

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    if it keeps stalling at the lights turn the idle up abit for now.

    halfway on the temp gauge is fine. You can also make a manual fan switch and just keep the fan on when riding in traffic.
     
    zixxer, Oct 18, 2015
    #64
  5. LexLuthor

    LexLuthor Well-Known Member

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    Hi guys. Does anyone with a ZXR have any suggestions for a replacement air filter? The last owner had a K&N one in my bike without a tune and genuine Kawasaki ones are obviously pretty much unable to buy. Does anyone know of any air filters that are pretty much replicas to the factory Kawasaki ones or something along those lines?
     
    LexLuthor, Oct 27, 2015
    #65
  6. zixxer

    zixxer Well-Known Member

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    look up unifilter air filters.
     
    zixxer, Oct 27, 2015
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  7. Phil

    Phil Senior Member Contributing Member

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    I am struggling to understand your question??? What filter do you currently have on your bike ???
    Do you still have the K&N filter, if yes then you need only to clean and re-oil the current filter.
     
    Phil, Oct 27, 2015
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  8. LexLuthor

    LexLuthor Well-Known Member

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    I still have the K&N. ill clarify a bit better. Im under the impression the KN filter requires tuning the bike to run it optimally. The bike hasnt been tuned to run the K&N filter. I was wondering if someone makes a replica of the stock air filter that kawasaki used to put in these bikes. Im happy to be corrected or hear other peoples thoughts

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    LexLuthor, Oct 27, 2015
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  9. Phil

    Phil Senior Member Contributing Member

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    Understand....from my limited experience with air cleaners, pods require adjustment however K&N just fit in and are reusable, simply clean/re oil and your away. I have fitted K&N filters and never had to make any adjustments at all.
    I could be wrong on this....happy to be corrected if so.
     
    Phil, Oct 27, 2015
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  10. LexLuthor

    LexLuthor Well-Known Member

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    Had a look. Do you know if they are like the stock Kawasaki ones or would they need similar tuning like the KN one?

    Sent from my SM-G900I using Tapatalk
     
    LexLuthor, Oct 27, 2015
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  11. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    GreyImport, Oct 27, 2015
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  12. LexLuthor

    LexLuthor Well-Known Member

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    Hmmmm.....

    So does that mean my K&N is not really a problem? I'm just a bit confused. In my personal situation fixing the carbies would make the biggest difference first. I'm thinking more down the track once I fix the carbies up and attach a new slip on exhaust. To my understanding an air filter such as a K&N combined with an aftermarket slip-on would definately mean tuning is required?

    Sorry if this something thats simple to understand because I don't lol :confused:
     
    LexLuthor, Oct 27, 2015
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  13. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Service the K&N .... using the right cleaning method and oil
    Clean and setup the carbs with stock jets and settings
    Put on the new exhaust

    Then take it from there
     
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    GreyImport, Oct 27, 2015
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  14. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    GreyImport, Oct 27, 2015
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  15. Phil

    Phil Senior Member Contributing Member

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    K&N is not a problem at all, it is simply put a reusable air cleaner filter.
    The cost generally speaking is around $100 per unit, this may seem a little expensive to start with but you've got it forever.
    The reason I changed was the filter for my bike was around $65.00.....so after the second filter I was ahead and never looked back.
    So having a K&N filter on your bike already means you never have to change it...simply clean and oil
     
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    Phil, Oct 27, 2015
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  16. kiffsta

    kiffsta Senior Member

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    I think you want to know if you have to re-jet the bike to suit the performance modifications you have installed or are planning to install ? Generally speaking if you replace the air filter and replaced the exhaust, you would make an assumption that the bike would be breathing better so its makes sense to adjust the fueling to suit. It would be trial and error and the best method would be to pull your plugs after a run and do a plug chop to validate if its lean or rich, then you can make incremental changes to suit, this would be best done by a mechanic who knows what they are doing. I suspect that the stock jetting would be fine with your filter and a performance exhaust. I ran a tyga performance exhaust on my ZXR250C and didn't make any jet changes ( sounded cool as ).

    I am with GreyImport that your next course of action should be a carb rebuild and get it running 100% before any further mods are installed otherwise you wont have a baseline to work from.
     
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    kiffsta, Oct 27, 2015
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  17. LexLuthor

    LexLuthor Well-Known Member

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    I think you pretty much said what I was thinking. FYI my father in law(mechanic) and I pulled the the bike apart on the weekend. Motor is solid carbys need work but gunna set aside another whole day to just take the carbies apart and have a proper look at them. So far from what we saw the seals are slowly starting to deteriorate as we all know happens and there is a vacuum leak somewhere. However its not overly major at the moment and the bike runs reasonable well for now. After i fix this is when i will worry about putting on an exhaust. However, Going to fix my leaking forks first with him as they are affecting my front brakes and i thinking stopping is more important than being loud haha

    Sent from my SM-G900I using Tapatalk
     
    LexLuthor, Oct 27, 2015
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  18. LexLuthor

    LexLuthor Well-Known Member

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    By the way, how loud was the tyga exhaust? I want to get their carbon slip on with the steel tip when the time comes but im worried it might be too quiet :/

    Sent from my SM-G900I using Tapatalk
     
    LexLuthor, Oct 27, 2015
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  19. kiffsta

    kiffsta Senior Member

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    cant find my old Video, but this should give you an idea

     
    kiffsta, Oct 27, 2015
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  20. zixxer

    zixxer Well-Known Member

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    the xcite exhausts for the mc22 fit on the zxr if you cut the little tip of the exhaust and drill out a hole abit bigger, you can only get 2 screws in but it does the job for 60 bucks.
     
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    zixxer, Oct 27, 2015
    #80
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