While I donít have one to get rid of, I did recently install one and am well pleased. I also went +2 in the rear.
Slightly old post I know, but am trying anyway.
I also just put a 15 on the front and it's amazing, so much more acceleration out of corners,
and definitely not too revvy, not as much as the new Honda CB1000R is.
I'm also considering doing the plus 2 on the rear, but I'd need a new chain to do it.
The 15 gives 2.87 ratio, (standard ratio is 2.69) plus 6.3 torque and minus 6.3 on the speedo
The 15 with a 45 rear gives 3.00 ratio, plus 10.4 torque and minus 10.4 speedo
I'd have to buy a speedo corrector then.
I'm still with the 530 chain as I only changed the front sprocket.
What's the advantage of the 520, is it just less weight, does it last as long?