got this 04 600 1800miles on it. been riding for a while put some miles on it with no problems. bout 3/4 of the way back it started to rain. hence its been very dry here. lots of dust. has a new k&n air filter with pre filter. it just wanted to bog out when giving gas. but when you ease the throttle it doesn’t bog, just when u nail the throttle.?? it bogs only at idle??