The factory always jets them way too rich. Go to Eric Gorr's web page and it will tell you how to jet for your area.

 

You didn't say how the bike ran. Fuel/oil ratio, type of oil. Personal preference in oil is important, find one you trust and stay with it, don't change two stroke too often, imcompatability between oils can cause bottom end failure. My preference is sprctro @ 40:1. If your bike is fouling plugs but running ok, you might need to go to a hotter plug, but again, be careful, wide open with too hot a plug spells hole in the piston (hitp). Most of the time, raising the clip on the needle one notch and going one step leaner on the pilot will give you substantial results. Watch out for pinging. Bad....Is your plug black when you take it out?? Lots of variables, the main thing is to not be too drastic in the solution, or you might end up with bigger problems. There are some very good articles out there on jetting if you can find them. Good luck
JDDick

 

I see you are in Idaho. one rule of thumb is to jet 1% leaner for every 1,000 ft over 2,000 ft. Is it a 250 or 125? A 125 might last a little longer with a mix of 32:1 and jetting a tad on the fat side on the main jet anyway. Have fun.
Example - If you are at 6,000 ft and your bike has a 150 main jet, 4% of 150 =6 so you might start with a 145 or 142 main.

 

thanks for the reply john deer,its my buddies 250 that is having the trouble,he couldnt get his login to work so he used mine and I told him that that might confuse some if they looked at my profile,but he is impatient but thanks for the info I'll pass it along!!!

95 Dodge Ram1500 5"susp.3"body 39.5"superswamperTSL