was much easier than expected...front sprocket bolt off first.....clip off with standard needle nose pliers and chain right off...rear wheel off and rear sprocket replaced...wheel back on...chain with rk master link...all aligned and done...40 mins...

went for a test ride today...really like the 15t/40t sprocket combination on the sf 17" wheels...good cruising rpm with a little more umph...feels like 6th and 5th both have a that little needed power on the highways...i haven't tested out the 13t/40t combination, but will try it out next weekend...