250-500cc fuel fouling plugs

so the needle is 3rd clip. 40 pilot and 410 main. i dropped the main to a 400 and it was stell wetting the plug with fuel, but not actually fouling, but ending up a little white on the tip. so, i went back to the 410 on the main and dropped the pilot to a 35. it seems to be running alot better now. after tomorrow i'll know better how it's working.

thanx for the tips about addressing the pilot circuit motosports and old geezer. deny as i tried, i think that you guys were right about it being the problem. it's just so much easier to change the main versus the pilot/needle. anyway, we'll see how it goes tomorrow. i have a feeling i'll end up going to the pwk before long if this keeps up.

So, after playing with the several different pilot/needle variations I'm going with the pwk. Enoughscrewing around. Thanx for all of the help. I could get it good for a bit. Then a cloud would pass over. Screw the mikuni

I have not tried the iridium plugs in a 2 banger but they really do burn better and foul less than a standard plug. Might be a good move in conjunction with leaning out the pilot jet. By the way thay last forever, worth the few extra bucks.

Funny but true,I was soo happy the day I threw that thing in a box and mounted a PWK.The thing acted like it was possessed