Question about 2003 kawasaki KX 250

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I have a 2003 kx250 i run it with mc1 50:1 and when i ride it slow around my campsite it will foul a plug and when im out in the trails getting on it hard it will run hard what sould i do so i dont foul out a plug when im riding it slow around the campsites

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  • thtcbrink Jun 20, 2009

    i put a br7 and the stock one is a br8 so i put a hotter plug and it still fouled one of those

  • thtcbrink Jul 06, 2009

    thanks i changed the premix to castor maxima 927 and it runs like a whole new bike

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I would stay with the same heat range(BR8) to stay on the safe side. You didn't say if when you are at the camp sight the bike is cold and just off the truck or warm and right off the trail. But usually alot of 2strokes need to be cleaned out when their being warmed up or they can foul a plug. Get it started, blip the throttle a few times to get some heat in the cylinder and then hold it open until you hear it rev faster and run smooth. Thats usually enough.

Posted on Jun 26, 2009

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YOUR ACTUALLY RUNNING IT TO LEAN YOUR RATIO IS SUPPOSE TO BE 32:1, AND LOVE TO RIDE IS CORRECT MAKE SURE YOU BLOW OUT THE TOP END BY REVVING IT HARD WHEN YOU FIRST START IT. ALSO REV IT OUT ONCE IN AWHILE IF YOU ARE LUGGING IT AROUND, MY 03' WILL FOUL PLUGS ALL THE TIME IF I DON'T KEEP THE RPM'S UP. I RUN A BR8ES IN MINE, DON'T USE THE BR8EIX (IRIDIUM) THEY FOUL EVERY TIME AND THEY ARE EXPENSIVE

Posted on Jul 24, 2009

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Run a hotter plug for the campsite cruising,one step hotter should be fine

Posted on Jun 19, 2009

  • bogues400 Jun 19, 2009

    run a hotter plug for the campsite cruising,one step hotter should be fine

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Sounds like you are fouling your plug.Some possible causes make sure you air filter is clean. Correct gas oil mixture.How the bike is being use Trail riding/freestyle.This bike in stock form will foul plugs if it is being used as a trail bike.If everything is good air filter/gas-oil. Then you need to do a spark plug reading. This will determine if you need to rejet the carb. Hope this helps
D.

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The stock plug was a BR9** - the R indicates a resistor plug which is not needed.

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Aug 01, 2009 | 2004 kawasaki KX 250

5 Answers

I have a 2005 kx 250 2 stroke and it keeps eating plugs


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2 Answers

Foul plug


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6 Answers

Kawasaki kx 250 fouls spark plug in 30 minutes


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