Overheating in stop and go traffic - Kawasaki Ninja 250R Forum
 
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post #1 of 9 (permalink) Old 10-03-2009, 02:36 AM Thread Starter
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Location: Tucson, AZ
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Question Overheating in stop and go traffic

Can I get some insight on some causes that would make a 2007 ex250 overheat in stop and go traffic? Its around 100degrees here in the sun in tucson and my bike likes to heat up when in stop and go traffic. I'm going to pull the spark plugs this weekend and see if its running lean or not.

I'm thinking it could be a faulty thermostat, bad relay, or possibly running lean at idle. I may try using engine ice and see if that makes a difference too. I think i also heard that 250rs just generally overheat at lower speeds.

2007 Ninja EX250F
- K&N Filter Pods (RC-1822)
- Dynojet Stage III Jet Kit
-DJ114 Main, Needle Pos. #5
- Full Yoshimura Exhaust
- 47-tooth Sprocket


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post #2 of 9 (permalink) Old 10-03-2009, 05:58 PM
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The owners manual says you should not let the bike run for more than 5 minutes at idle. How long are you sitting in traffic?
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post #3 of 9 (permalink) Old 10-03-2009, 10:52 PM
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I would guess it's overheating because you're in stop 'n go traffic and it's 100 degrees. Splitting lanes might help.






I know, I'm no help.

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post #4 of 9 (permalink) Old 10-04-2009, 01:57 AM Thread Starter
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Pulled the spark plugs today. They were light gray so the bike is running lean. I'm guessing it might be from the from the yoshi pipes, but a mechanic said they run pretty lean from the factory too.

Also noticed that there were hotter running spark plugs for cold weather in the bike, which for tucson az is ridiculous. I changed those to regular ones. There seemed to be a difference in engine temperature after that. I'm still going to get the bike rejetted so it won't run lean anymore.

2007 Ninja EX250F
- K&N Filter Pods (RC-1822)
- Dynojet Stage III Jet Kit
-DJ114 Main, Needle Pos. #5
- Full Yoshimura Exhaust
- 47-tooth Sprocket



Last edited by NinjaAddicted; 10-04-2009 at 01:59 AM.
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post #5 of 9 (permalink) Old 10-04-2009, 06:33 AM
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The bikes do come from the factory a little lean. The color of your plug may be the result of a hot plug more so than a lean tune. (not that a rejet is a bad idea, especially with your exhaust)

Some people have been led to believe that a hotter plug means more power, or even a stronger spark. Not the case.
The hotter a plug is, the better it cleans itself. If the plug is too hot, it will cause preignition. If the plug is too cold, it will foul easier. A healthy engine, with a good tune, will run fine with a cooler plug. If the engine is tuned rich (this may be the case for you, depending on the size jet you go with), a hotter plug may be required.

Either way, let us know how it works!
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post #6 of 9 (permalink) Old 10-05-2009, 12:24 PM
 
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could hook up an external switch to your radiator fan so u can turn it on at will .. might help?
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post #7 of 9 (permalink) Old 10-06-2009, 02:12 AM Thread Starter
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Location: Tucson, AZ
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The thought of that has crossed my mind. I'm confident I could wire the fan to do that, but not too confident about what I would mess up as a result lol. There's a lot of wires I don't want to cut down there. There's got to be some kind of wiring diagram.

2007 Ninja EX250F
- K&N Filter Pods (RC-1822)
- Dynojet Stage III Jet Kit
-DJ114 Main, Needle Pos. #5
- Full Yoshimura Exhaust
- 47-tooth Sprocket


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post #8 of 9 (permalink) Old 10-06-2009, 05:08 AM
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Running the fan from a switch may stress the bikes charging system. Some of those fans can pull upwards of 20 amps.
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post #9 of 9 (permalink) Old 10-06-2009, 11:52 AM Thread Starter
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There's always a catch!

2007 Ninja EX250F
- K&N Filter Pods (RC-1822)
- Dynojet Stage III Jet Kit
-DJ114 Main, Needle Pos. #5
- Full Yoshimura Exhaust
- 47-tooth Sprocket


NinjaAddicted is offline  
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