Let me qualify this by first saying I haven't owned any really quick bikes in the past....but....OMG, swapped out the stock 16/43 sprockets for 15/44. All I can say is, WOW. My 919 already had a lot of bottom end, but now it feels like is on steroids. I don't like riding fast, but I like to "quickly" get up to speed, so the gearing change was perfect for my riding style. Definitely a wheelie machine now.
Gonna surprise my GSXR 750 buddy the next time we are out.
im thinking about going to the 15 tooth front sprocket.
the cops over here are a bit too anal about speeding,
get caught above 145kph/90mph instant 28 day loss of license
bike impounded for the same.
then off to court to find out the dequalification time,up to 6 months..
What sort of revs are you doing at 100k's/62mph??.