So, i've noticed that my mpg has dropped from a decent 45+ to around 31mpg, anyone have any idea why i might have dropped 10+mpg? at first i thought it might be jacked spark plugs, so i changed them out when i did my valve job a week or two ago- but no increase. with the exception of a k&n air filter, bike is stock. I've also noticed that i can smell gas the last month, so perhaps it's running rich? if this is the case, how do i change it with the stock fuel controller? and why would it suddenly start running rich? i'm running mid grade fuel through it (89), and it's a 2008 classic. thanks!