I know this is an old thread, but had to yell,, after 3 years on my 09' KLR650. I decided I'd give the 16 ago, (thanks to this thread) since I'm more of a 90/10 driver,,and my 10 is normally hard packed fire trails, Lil back ground I'd done the .22$ mod, as well as a few other mods,, anyway after a week of trial runs ( all under 100 miles) the difference for me is HUGE. Not sure why some are only getting a 300 rpm difference,, mine is a 700-900 rpm difference minimum,, I use to be at 5000 rpm at 70mph. Now I'm running 4300 all day long,, 75 /4500. And I'm not winding out 3 gears through an intersection any longer
I'm thinking run a 14 front if you wanna go more dirt. And 16 for more street, Btw. I'm 180 lbs so might be the main rpm difference,,, and yeah breaking the nut loose took 2 peeps for me. One footing the brake, and me with a breaker bar on the other side,, tried solo but way to awkward for me.