First of all, many thanks to James and Clark for your suggestions to my WR starting/fouling woes. I have a 98 WR400 with WB E series, tapered head pipe, air box top removed, YZ timing. I was running the DTM #4, 45PJ, 2 turns, 162MJ and I was regularly fouling plugs. I have now gone to the DVP#4, 48PJ, 1.25 turns, 172MJ and it seems to run great. I still want to try a #5 clip with a larger MJ. Thanks Clark and James for your help, I'm finally enjoying my ride!!! Anyway, here is my theory... I've noticed I would foul plugs shortly after starting the engine. The last time it happened I just got all suited up and started to head out and on came the snarling and poping. My theory is these carbs shoot an unbelievable amount of fuel once the throttle is opened, and could it be this stream of fuel are heading into a cold cylinder and plug with no hope of vaporizing. I was quite impressed with the distance that stream shot when I had my carb off to do my changes. So, lately I have been going with a new procedure by starting it and letting it idle just long enough on choke until it will idle on its own with the choke off. I then let it sit and idle until the cylinder head is quite warm to the touch and only then get into the accelerator pump. Maybe we're getting a bit anxious with these "squirter" carbs (never had one before!) So far, no fouled plugs! Any thoughts???