Stuck float? Happened to me on #4 and she still ran on the track but spit raw fuel at idle on the leathers of the guy behind me. The real cause was shrinkage of the needle valve seat o-rings. Gas ran around the valve.
Drain your oil. Smell like gasoline? Continuing to crank it could hydro-lock a cylinder. You don't want to go there. The plugs, if fouled, are fouled for a reason.
I used to cure my old Kawi 650 on the road by wacking the carb bowls with whatever was laying in the road - rocks, etc. Freed the valves. I was poor back then and didn't want to hand Kawi $100 for 4 needle valves. A good sign of them sticking was sliding out on the rear in turns as gas covered the rear tire. DOn't get the wrong idea about me. The Kawi cost me $100 and was my first bike. The B12 gets loving care.
Your carbs are likely dirty. Pull 'em and clean 'em.
Marc/Atlanta
'99 B12
mods and 25K