owner of a new '18 109 BOSS for about 4 hrs now. thing is a powerhouse. rode it from the dealership(bout 70mi.) passing is effortless, even in top gear, amazing. of course, im used to my last bike, the M50. the difference is black and white. as for oil changes, the manual calls for 40W, while the dealer told me they only use 50W. any input on this would be helpful.
Anyways, looking forward to getting to know all of you. I'm only 70mi into my 109 ownership. but it looks to be a promising tenure.