So I've heard it said that a change of 1 tooth front is equivalent to 3 on the rear.
I've heard that too Jon... dropping
one in the front is like adding
three in the rear.
Following that reasoning, your ratio is the same as stock.
one in the front was like dropping
3 in the rear. That, accompanied by the 40T rear (-3) would be like having a 37T rear.
16/43= 2.687 (OEM)
17/40= 2.353 (Casey's old highway set-up)
16/37= 2.312 (just for reference. never heard of a 37T rear)
15/45= 3.000 (Casey's RR3)
15/47= 3.133 (Casey's RR2)
You said lower rpms at speed now - so you gained some top-end, but lost just a little power or quickness at lower rpms?
Since most folks go the opposite way, like my -1+2, I'm just trying to wrap my head around your setup. I understand your intent was different than mine, but your end choice seems like it would have minimal effect. How big of a change was it?
That was almost 10 years ago, mi amigo. I remember it being "lethargic" when getting back on the on-ramps after fuel fill-ups during long trips. Although while on the Interstates, my memory is of less vibration in the bars and MsPG being in the upper 40s.
Currently my RR2 is 15/47 (-1/+4) and my RR3 is 15/45. Both with 520 "conversions".