KX250

[iceman]

I got a 94' KX250 today. It was running and riding fine, wouldnt idle though, till the spark blug went out. I put a new one in and now it runs like dogshit. I tried messing with the jetting and that just made it worse, starts every 3rd-10th kick, it smokes out of the exhaust horribly, and when I go into first and take off it dies, even when I pin the throttle down it dies. I try messing with the idle switch and jetting again, no luck. Then I think oh yeah the air filter...Oh my god...the air filter looks like its been to hell and back. Its covered in dirt and theres rips all over it. Could the smoking out of the exhuast, idling, and the dying be cause by a dirty air filter? I'm obviously going to replace it but do I need to rebuild the engine because there may be dirt in it? The oil level looks fine, theres a little oil guage on the side and theres oil covering it up either because its stuck to the plastic or its full, not real sure. I'm going to have it serviced because i don't feel like dealing with it. If I need the engine rebuilt I'm going to be pissed because I don't have the time and I don't feel like spending 250 bucks to get the top end rebuilt.

Edited September 11, 2004 by iceman

[Banshee~]

Did you gap your new plug?why did you get a bike....I thought you were getting a shee

[roosthrower]

a compression test would tell you what you need to know.

[John19]

a compression test would tell you what you need to know.

x 2

[iceman]

I would have gotten a shee but I can't afford one right now. When I'm older and have a real job I'll probably be able to finance one or something like that. I wish I couldve gotten a shee but this is fun for now. I'm going to clean out the carb today and maybe look at the top end. I'm guessing theres a bunch of dirt in there which is gonna suck. Thank god for clymers. Did I hear someone say you can get compression testers at Wal-Mart? I wish it wasn't Sunday so I could go get an air filter, anyone know a place that might have one that would be open on a sunday? The spark plug is new and it starts up so I don't think the spark plug is the problem, I think it has something to do with the jetting and the air filter, probably the exhaust packing too.

[iceman]

Ok, I checked the compression. Recommended is 114-176. The compression is 150. I opened the silencer and the packing was pitch black. Took it out. On the inside of the silencer it looks like theres gum on the side or something, it looks like something might have melted on it.... I inspected the forks and the left side is leaking oil at the bottom. I started draining the gas tank and the gas is a radioactive green color. The gas isn't pre-mix. I may be mistaken but I don't think gas is supposed to be green. Anyone know what thats about? I thought all two stroke engines had to take pre mixed gasoline. The clymer manual says as long as its 90 octane or higher it will be fine. I'm bringing in to be serviced tommorrow, I'm going to have them jet it and check to see if the engine needs rebuilding or not as well. I believe my bike running like dogshit is from the dirty air filter, jetting messed up, and the exhaust packing. Does that sound right? So the engines compression is fine but could it sill need a rebuild because of dirt? The carb boot did have some dirt in it.

[Banshee~]

the packing wont cause that...but you might have got a cloged jet? did you check that out

[watkins]

I started draining the gas tank and the gas is a radioactive green color.

U sure you didnt just drain out the radiator?

[iceman]

I know for sure the bike isn't jetted right, I havent messed with the carb much though. I did take the hose off the radiator because I thought I had drained it. I got covered in the stuff. When I started draining the gas it was green too though. The gas tank was off and away from the bike though so I know it wasnt radiator fluid (unless the guy put radiator fluid in the gas tank...) I don't know why the gas was green. I'm bringing it in tomorrow anyway. 60 dollars for a service tune up. It's $250 for a top end rebuild! I hope I dont need one, I'm not confident enough to rebuild a whole top end, especially since I don't know anyone around here that knows anything about engines. I was thinking of cleaning the carb today but I don't want to mess anything up more than it is messed up. Thanks for all your help too, I was posting over at motocross.com, I thought that they would be helpful because they ride dirt bikes, but no such luck. You guys are the best.

[watkins]

Does the green liquid from the gas tank smell like coolant or does it smell like gas?

 

However.. now after reading your first post again i doubt its coolant because you said the bike was running fine when you got it.

 

Also, I would do what Banshee~ said and check the gap.. if it ran ok with the old plug and as soon as you switched it out with a new plug it ran like crap then something may be up with your plug. It can still run with the wrong gap, just the spark wont be correct.

Edited September 13, 2004 by watkins

[iceman]

Its on its way to the shop right now. The gas did smell like gas, so I know it wasnt coolant. I'll just let the guys at the bike shop work on it and then they can charge me a leg and an arm for whatever. I know I need a new airfilter and I know I need packing in the exhaust, I think an O-Ring or a seal is broken at the bottom of the left fork so they'll probably charge me for that too. I'm pretty sure about those things.

[tats4life]

c12 mixed with 927 looks green........but not radio active green........did it smell like pump gas or race gas........do you now what race gas smells like

[iceman]

Nah it smelled like regular pump gas. Its being checked out right now, the rear brakes are also gone. This tune up is going to cost an arm and a leg.