2010 250 no start issue - Kawasaki Ninja 250R Forum
 
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post #1 of 7 (permalink) Old 02-09-2016, 02:56 AM Thread Starter
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2010 250 no start issue

After riding for several months and several hundred miles on my new (to me) 2010 250, I am experiencing a no start issue. The problem is not with the battery, as it tries to turn over. I don't know if it's the spark plugs or not, but I doubt that both would just completely fail at the same time. If I open the choke and open the throttle slightly while trying to start it, it might turn over...however it immediately dies after releasing the throttle. Fuel also dumps out from what I think is the carb overflow tube. What my research has turned up so far is that the float or floats are probably stuck or sunk, and that cleaning the carbs should help resolve the issue. I've already tried mechanically agitating the float bowl, but that hasn't worked.

Just to clarify: I pulled the air filter and observed that air box while attempting to start. The box that houses the air filter is what floods with fuel and then drains the fuel out after the bike dies.

I just want to verify that cleaning the carbs is the correct course of action before taking this on. Please also note, this is my first bike. Although I'm somewhat mechanically inclined, my knowledge on how a motorcycle works is VERY limited.
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post #2 of 7 (permalink) Old 02-09-2016, 11:18 PM Thread Starter
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Update. I just found that the petcock valve was in the "prime" position. I have never touched it. Is it possible for the bike to run long term like that though? If not, maybe someone walking past the bike decided to mess with it.

That being said, I tried to drain the float bowls. Nothing came out of either side. Any idea what could cause both the float bowls to not drain, as well as the engine to not run and then dump gas?
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post #3 of 7 (permalink) Old 02-10-2016, 12:32 AM Thread Starter
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Just now I found that the right side spark plug wire was not on the spark plug at all. Upon further inspection, the contact on the end of the spark plug wire is far more corroded than the left side...enough where it's probably not getting any electrical contact.

Now that the petcock is set to "on", it's not dumping fuel anymore...although the tank is nearing empty.

I'm wondering if the petcock set to "prime" was flooding the engine with too much fuel, and only getting spark to one cylinder was causing it to be unable to continue running. Does this sound possible? Again, my knowledge of bikes, especially carb'd bikes, is quite limited.
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post #4 of 7 (permalink) Old 02-17-2016, 02:46 AM
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Very possible. For normal operation have the fuel valve/petcock in the on position.
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post #5 of 7 (permalink) Old 02-29-2016, 03:51 PM
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Regardless of the position of the petcock, the float needle valves prevent fuel from entering when the carburetors are full.

A.T.G.A.T.T so I may ride another day. www.rockthegear.org

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I'm not your mom and I'm not paying for your parts, so do whatever you want with your own bike.
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post #6 of 7 (permalink) Old 03-26-2016, 02:53 AM
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So when I drain my tank on my 2012 I use the prime position. If it is in the on position it won't drain. This tells me that the prime position bypasses or decreases the vacuum required to draw fuel into the carbs.
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post #7 of 7 (permalink) Old 03-26-2016, 03:01 AM
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You are correct, set to prime doesn't require vacuum to allow fuel to flow, just don't forget to switch back to ON.

A.T.G.A.T.T so I may ride another day. www.rockthegear.org

ZX-2R Photo gallery


I'm not your mom and I'm not paying for your parts, so do whatever you want with your own bike.
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