In the past 2000 kms, I have changed the plug 6-8 times because it is carbon fouled... I have gone from a 165s Main down to a 155, Had the needle (OBDQR) on the second from the top all the way through to the second from the bottom. I have done the BK mod as well as timed the squirt as per the manual!!! It is a "Canadian Model" with a stock Stainless Pipe and can (Cannot remove the baffle in the end as it is a welded in piece), it has the airbox lid on, but snorkel removed. It runs good for a couple of hundred Kms, then it starts to buck and fart until it gets warmed up (to get it warmed up, I have to hold it Pinned down the road... not too good riding in town) It has a BD Quick release DS kit I am running a OBDQR on #3 position Main 162 (Now) Main Air Jet 200 Pilot Air Jet 75 Starter Jet 65 Pilot Jet 45 Today, I checked the plug and it was white in the middle and "black as the ace of spades" on the outside edge. I checked the float level and it appeared to be too high, I set it to the specs in the manual. I raised the needle to the #4 position and put a new plug in it... ANY IDEAS...??? WILL A JD JET KIT HELP ME FIX MY SPUTTERING PIG...????? PLEASE HELP?!?!?