o.k., i just installed a white bros. pipe(left stock header) K&N filter and outerwear(no airbox lid) and jetted(i had my local shop do the jetting). the bike runs perfectly fine, but is very hard to start in the cold weather. on sunday morning it took me an hour to get it running. I thought I flooded it so i let it sit there and i decided to pull the plug to see what it looked like. It was very black and a tiny bit moist, but not real wet. after i cleaned up the plug a little bit, it fired right up! what does this mean? i don't know how to tell what is wrong with a motor by looking at the plugs. BTW, it is the stock plug. the bike has only like 10 hours on it. also, i don't feel safe running without a airbox lid. will i have to rejet if i put it back on? will it cause harm to the engine if there is not enough airflow(i believe is called running too rich)? thanks

 

haha welcome to the 400ex world they always start hard in the cold