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Message: [QUOTE="tomthumb, post: 113600, member: 17969"] This all sounds so familiar. After jetting my bike and a couple of months of no problems, I also started experiencing fouled plugs on initial start up and found it to be two different things, my floats were set incorrectly and my gas was not shutting off completely. Sometimes, if the floats are set to low and the bike sets overnight and/or rides on a bumpy trailer, gas can collect in the bottom of your cylinder. Then on the first start of the day when applying a little throttle to clean it out, it pulls the fluid to the top and wets the plug. In my experience this combined with my gas not shutting off completely guaranteed me a fouled plug on initial start up 4 out of 5 times. I slightly overset the floats high to ensure the fuel was being shut off when the bike was bouncing on the trailer and replaced the o-ring in my petcock. After setting my floats, I went to start the bike and it again the beast drenched another plug. Discourage, I went the house and sulked. After awhile of poor pitiful me I realized that the bike probable still had gas collected in the bottom of the cylinder. I put a new plug in it, fired it up rode it around the yard and I have not fouled a plug in seven months. A trick I used on setting the floats was to mark 60 degree angle on the garage wall to ensure I was holding the carburetor at the right angle. You may also want try and set the floats a little higher than spec and see if the problem persist. Good luck! tomthumb 2000 KTM 300EXC [/QUOTE]

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