i ordered up today, a hmf slip on jets and a needle, also a k+n filter, gonna run without the airbox lid, also picked up a service manual, kurtz kawasaki where i purchased had none in stock, i had a harley manual before i received the bike. my hearing is a little weak from loud music, hot rod cars, a triumph and now a harley, not to mention 30 yrs of construction noise, so i prolly will not notice the air box noise. thanks to all for your input and i am looking to enjoy my first REAL DIRTBIKE, had a couple scrambler models and enjoyed the back roads. the overweight harley is not fun off any paved road