Help with 250sx

[mark38090]

Last Monday I rode the 250sx 16 milesacross the woods and back. Today I get on and it won't hardly run, backfires, shuts off on the throttle, sounds like its spitting back through the carb also. Any ideas what I should be looking for? I don't have much experience with this one and the carb is not even close to my Yamaha.

[super90]

Most likly your carbs just clogged. If i ran good before a piece of dirt probably just got in there and clogged the jets up. Theres not much to cleaning them. But if it continues i would get a carb rebuild kit. And i would put some fuel filters on it. My 110s tank is somewhat dirty and they helped tons.

[cragster]

Is it full of gas? I would fill it up and swish it around because it probably has dirt in the tank and possibly might have gotten into the carb. Does putting it on reserve help?

[ScottZJ]

Open the drain screw of the bowl on the carb with your petcock gas on, if it has a nice steady flow then your fuel is flowing fine. If not, then you need to trace back to the problem.

[Roostertail]

I know this sounds simple (but you didn't mention it in your post). How's the air filter?

[atctim]

Also - simple - but did you try a new plug?

[mark38090]

ok, I tried the new plug and no help. So I guess I'll start on the carb.

[Tri-ZNate]

my bet is a plugged main if it dies on throttle