I installed a K&N BW-8006 air filter in my F650GS. After riding several hundred miles, I can say the throttle response and smoothness is noticeably improved. It's most noticeable at slow engine speeds, where the throttle is fairly "touchy" especially just off idle. Just thought I'd pass it along - I've read a handful of complaints about the touchiness of the throttles on here.
Hopefully, my MPG will improve a bit as an added bonus.
Hopefully, my MPG will improve a bit as an added bonus.