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Old 07-19-2007, 08:22 AM   #1
ninjathatcould
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Exclamation Carb troubles...

I was warned by several people before I ever cracked open the carbs that once you mess with them, theyre just not the same. This was the case.

Bike: '04 Kawasaki Ninja 250

Original problem: Hesitation around 6,000 - 7,500 RPM and slow response through this range as well.

What I did: I cleaned the left port, as it was clogged pretty badly, but everything else looked ok. I took all the components out then reinstalled them as they were before just to check. I followed the guides on www.ninja250.org (i'm pretty mechanically minded) and it seemed to be a simple process.

New problems since I tried to clean the carbs:
-slooooow throttle response; roll on throttle, delay, rev up, roll off, rev down SLOW
-engine stalls when you crack the throttle slightly
-running a little too rich from the smell


So, does anyone know what this sounds like? Anyone that would be up to coming by my house to take a look at it? (spring) If all else fails, how much is a carb adjustment at, say, somewhere like Motorcycles Unlimited? TIA! :icon_bigg
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Old 07-19-2007, 08:35 AM   #2
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I would guess average bike carb cleaning to be around 250-300, but that's a guess....I'm no motorcycle mechanic.
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Old 07-19-2007, 08:55 AM   #3
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You've got to be kidding... thats recockulous
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Old 07-19-2007, 09:36 AM   #4
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Chris, can you point to the exact guide you used? What chemicals did you use when cleaning? Did you take before/during/after pictures? I may be available later today to help you look it over 1 last time.
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Old 07-19-2007, 10:49 AM   #5
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I used an aerosol cleaner, just sprayed out the jets and ports. Somone on kawiforums.com said it might be the floats. *shrug*

http://faq.ninja250.org/wiki/Cleaning_the_carbs_2
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Old 07-19-2007, 12:03 PM   #6
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Old 07-19-2007, 01:23 PM   #7
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carb tuning

Hey give us a call ask for nick we can get your carbs tuned back up. 713-957-9922
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Old 07-19-2007, 01:41 PM   #8
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do you have gas in the bike? I know that sounds stupid but it would be worth disconnecting the fuel line and making sure you have flow, then if that's good, then shut the gas off and drain each bowl (carbs on the bike) and measure how much came out. if that seems reasonable, then leave the bowl drain screws open the same amount and turn the gas back on and see if they are draining at the same flow rate. hope this helps. remember it does't have to be something complicated, it can be something so simple that you are looking over. does it run better or worse with the choke on? what about the bike warm versus cold? it will feel good if you can fix it yourself. You said you are mechanically inclined. Other option is find another ninja and compare stuuff..
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Old 07-19-2007, 05:27 PM   #9
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Quote:
Originally Posted by Squanto84
do you have gas in the bike? I know that sounds stupid but it would be worth disconnecting the fuel line and making sure you have flow, then if that's good, then shut the gas off and drain each bowl (carbs on the bike) and measure how much came out. if that seems reasonable, then leave the bowl drain screws open the same amount and turn the gas back on and see if they are draining at the same flow rate. hope this helps. remember it does't have to be something complicated, it can be something so simple that you are looking over. does it run better or worse with the choke on? what about the bike warm versus cold? it will feel good if you can fix it yourself. You said you are mechanically inclined. Other option is find another ninja and compare stuuff..
Yeah, it does have gas. I have reason to believe its the floats, but I'm not sure. I don't really want to pay $200+ to get it fixed... thats just a waste of money if I can do it myself. I'm going to be selling the bike within a few weeks, so I'm gonna try whatever I can do to get it running.

Thanks for the tip.
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Old 07-21-2007, 11:19 PM   #10
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sounds to be a few diff things, for one, when you clean carbs that are dirty, or really anytime u take them off to do anthing you MUST synch them, and u have to have a set of guages to do so. and also there are the main jets and the pilot jets, you have to pull each one off and blow them out with cleaners and such. if you get one more than another you will have one cylinder running diff and will never get it to run right,also you have the diaframs and the way it is setup could also be wrong and you could be getting wrong amounts of mixtures and also the mixture screws could be wrong. bring it by Motorcycles Unlimited on tues and well fix ya up
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Old 07-21-2007, 11:46 PM   #11
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Old 07-22-2007, 04:59 AM   #12
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Just buy you a set of mikuni flatslide carbs:icon_bigg I'll sell you my yoshimura exaust
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