Hi. I have a 1980 Kawasaki KX 250 that I decided to pull out of my brother's garage. It hadn't ran in 10-11 years or so I figured I'd mess around with it to see If I could get it to start. 2 Days ago I got it to start and run, rough but it ran. at the moment the only way I can get it to start is through the use of starter fluid and it still runs rough. It's running a ratio of 32:1, the carb was completely disassembled and cleaned, new gas, fuel line, and spark plug. I am not familiar with the world of dirt bikes or 2-strokes but I'm willing to give it a shot. Any help would be appreciated. Thank you
P.S. I don't know if this would make any difference but if I remember right the guy we bought it from raced it and i think had the engine bored and stroked
Have you pulled the fuel line off the carb to make sure fuel is flowing freely? Do you use the choke when you try to start it? When you say it is running rough, what exactly do you mean? Try to start it with the choke on and without starting fluid. After several kicks, pull the plug and see if it is wet. If not, pull off the bowl from the carb and see if it has the proper level of fuel. If not, maybe a fuel passage or jet is clogged, or the needle valve setting is messed up. Two strokes are simple, it's just a matter of fuel, spark and timing.
Bored maybe, but i doubt stroked. They usually bored them because they blew up the motor, as it doesn't make that big of a difference in power.
Did you check ALL of the passageways in the carburator to make sure they are clear? Also, see that you plug has a fat blue spark, light yellow is a little weak, and may be due to corrosion around the flywheel.
Also the reed pedals can stick and hinder performance, and last, make sure the air filter is cleaned and re-oiled with a good filter oil.
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I've checked the spark, and I am getting a blue/white spark. I accidentally touched the end of the plug when turning it over, got a good zap. Good idea with the reeds. I will check those. The spark plug I do have in it is a (NGK) B7es, it calls for a B9es, it wont start on the B9 but it will run on the B7 not sure there what's going on. Fuel flows freely from the tank and there is no air filter element at this time. I guess if all else fail go thru the carb again.
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