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Help I've got a problem with my '00 ZZR 250.

Discussion in 'Kawasaki 250cc Twins' started by Amara, Oct 30, 2019.

  1. Amara

    Amara Member Premium Member

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    When I'm sitting on 100km/h on the highway, I try to use maintenance throttle and my bike bogs down until I give it even more throttle and it picks back up and accelerates past the the speed I'm trying to maintain. It's fine for just running around town, and it starts with ease. I had the fuel filter replaced on Monday, and when I attempted to go for a ride yesterday, the issue started at 90km/h, so I turned around and went straight back home
     
  2. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    So you never had this problem until after you had the fuel filter replaced on Monday, yes?
    It sounds rich, but I cannot think of a reason why changing the fuel filter would affect that. Are all the carburettor settings standard?
     
  3. Amara

    Amara Member Premium Member

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    It's running a pair of Musarri mufflers with the db killers still in, and no carby tuning

    I've been having this problem for about a month, and it's only yesterday that it got worse.
     
  4. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

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    Try pulling the choke on a little at 90km/h and see if it help's or get's worse.
     
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  5. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    So between the time that it was running well and the problem developing was there any work done or any changes made to the bike? Secondly, do you know if all of the carb settings are standard?
     
  6. Amara

    Amara Member Premium Member

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    The only things I've had done to the engine are an oil change and new oil filter, and new spark plugs. The only thing done to the carbs is a full clean out. I got a new battery, and a new chain and sprocket set. And a fuel line connector was replaced. All this was done at just over 30,000km when I got the bike 2.5 months ago (just over 4,000 km ago). And Monday morning I got the fuel filter replaced.

    I'm assuming the carby settings are stock. The only thing done to it was a full clean out when I got the bike
     
  7. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Whats the only thing you have done to the bike? :cool:
     
  8. kiffsta

    kiffsta Administrator Staff Member Dirty Wheel Club Contributing Member

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    Is your fuel Filter on the right way ? There is an arrow on there to show the fuel flow
     
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  9. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

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    Was going to say fuel filter might be backward's, some cheaper fuel filter's can't flow enough too, i found that out on my FZR
    What was the reason you replaced the fuel filter ?

    Another thing, it could have a split vacuum line from the fuel tap to the intake, try riding it with the fuel tap turned to Prime.
    If it fix's the problem then look at the vacuum line for split's or if it's kinked etc, could have a damaged/split diaphram in the back of the fuel tap too.
     
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  10. Amara

    Amara Member Premium Member

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    Update : So after having my bike at the mechanic for about a month, I decided to go to the mechanic yesterday to check what's going on after they finally felt what was going on when I went in 2 weeks ago. The mechanic said : "All the vacuum lines are still good, the carbies are *clean*, and the diaphragms are *clean*. The next thing that I'm going to do is a leak down test which is going to be done tomorrow. Maybe one of the valves isn't letting enough fuel through or something like that. But there's definitely something going on with one of the cylinders dropping in and out."

    I'll post another update when I've got the bike back.
     
  11. kiffsta

    kiffsta Administrator Staff Member Dirty Wheel Club Contributing Member

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    Wonder if a coil cap is a bit loose , I bought a bike the other day because he couldn’t fix it , he had pulled the lead instead of the cap and it popped out causing it to loose spark
     
  12. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

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    I agree with @kiffsta, if a coil cap or coil lead was a little dodgy before it was touched, removing the spark plug cap's off the spark plug's when they changed them may have made a dodgy connection into an even more dodgy connection.

    The other thing when you had the fuel filter replaced, if the old one was blocked up or partly blocked someone may have played with the mixture screw setting's and tried to get it running right, then when the new fuel filter was fitted there's more fuel flowing and the mixture screw's are now set too rich.

    Is your mechanic a relation or a friend of the family or something ?
    Not many mechanic's want customer's bike's sitting around for a month or more, they usually want to fix the problem and get it out so they get paid for their work.
     
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  13. Amara

    Amara Member Premium Member

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    The mechanic has checked the coil and leads at least twice and there seems to be nothing wrong with them.

    Mechanic is at my local Honda Suzuki Yamaha motorcycle dealer about 35 minutes away from where I live

    https://www.begamotorcycles.com.au/
     
  14. Amara

    Amara Member Premium Member

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    I got a call a couple hours ago from Mr. Mechanic man saying that there's a pair of split diaphragms in carbies. He said that hopefully the new ones will arrive and be fitted by next week
     
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    Last edited: Jan 17, 2020
  15. Amara

    Amara Member Premium Member

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    Got my bike back last week IMG_20200215_203615.jpg IMG_20200215_203637.jpg IMG_20200215_203655.jpg IMG_20200215_203705.jpg
     
  16. kiffsta

    kiffsta Administrator Staff Member Dirty Wheel Club Contributing Member

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    Hmm, that is a big bill to swallow, most bike shops bill labour @ $100-$120 per hour, in my opinion to test ride, remove carbs , diagnose issue, strip and clean carbs, reinstall them, sync the carbs would be around a 2-3 hour job, so I think labour cost is about right for the job , I also think the vacuum valves are about right, Partzilla has them for $126 USD , but you add freight and GST and convert that to AUD it comes close to what they charged you.

    Are you happy with the bike ? How does it run now ?
     
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  17. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Yep sounds normal ... thats why no matter if its an old bike or car , or even a newer one , the more you can learn and do yourself the better ..... Ive been doing my own stuff for 50 years but I still get ripped and deal with poor workmanship on things I cant do at home myself ... the worse part is finding a mechanic that actually knows what he is doing.... Im still looking :cool:

    And in the end thats the magic question ... is the bike running 100% ?
     
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  18. Amara

    Amara Member Premium Member

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    Runs the best that it's ever been. The carbies are probably the cleanest original carbies of any H11 zzr250
     
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  19. Amara

    Amara Member Premium Member

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    I trust this place won't rip me off too much. And now that I've lost most of my tools, I can't do much to my bike without either relying on my dad for help or taking my bike to this place.

    They have touched every bike that I've owned except my first bike (Yamaha Zeal) because there wasn't anything wrong with it.
     
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