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10/31/2014
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Hello!
I have a 2007 CR250 with the JD jetting kit.
The bike runs awesome. Its crisp, fast and has no flat spots.
I have been riding it this way for 3 years and it has never fouled a plug.
I have started with FMX and today i cut grab holes in my air filter box / side number plates.
When i started it and let it warm, it died. Checked the plug and it was very wet and dark.
Its obviously running rich. since its a big hole in the air filter box, it gets more air than before.
Im 100% thats the problem. Some carburator tuning is needed and i need some help to be guided in the right direction.
Im thinking some adjustments is needed on the air screw. Going for a smaller main jet maybe?
Some help is Appreciated
I have a 2007 CR250 with the JD jetting kit.
The bike runs awesome. Its crisp, fast and has no flat spots.
I have been riding it this way for 3 years and it has never fouled a plug.
I have started with FMX and today i cut grab holes in my air filter box / side number plates.
When i started it and let it warm, it died. Checked the plug and it was very wet and dark.
Its obviously running rich. since its a big hole in the air filter box, it gets more air than before.
Im 100% thats the problem. Some carburator tuning is needed and i need some help to be guided in the right direction.
Im thinking some adjustments is needed on the air screw. Going for a smaller main jet maybe?
Some help is Appreciated
I would suggest that you check the float level and float needle seating.
How old is the top end? How many hours?
What is your compression reading?
Paw Paw
Also check to see if the crank side seal went bad. That would cause a rich cond. & foul plugs.
Post a reply to: 2-stroke Honda CR250 fouling plugs