15-43 is stock for CBR600 F2 and F3. 16-45 is stock for the F4 and 16-46 is stock for the F4i and RR. 15-43 is more for top speed and mileage than for acceleration. 14-43 or somethiing like 15-44+ or above would be for acceleration. (lower number front, or higher in rear = better acceleration.

AK-47, you sure you put that tall of gearing on? That's way less than stock and your bike, unless heavily modified would be a dog off the line compared to other bikes.

 

hmm, i could have sworn stock on F3 was 14/45.

 

14-45 would probably be the famous -1+2I keep reading about on this board. Most everything I have seen from searches and mfgsequates these numbers to a 520 conversion that is supposed to help the 600 rev easier and achieve max potential. I guess it would never hit the top speed in 6thin stock gearing, so upping the ratio helps top the bike out quicker. I think the F4, F4i, and RR have different ratios possibly because of more horses or possibly because of different gearing in the trans.

 

It's either 16 or 14 in the front,but the rear is definately a 41 tooth.
I just told the guy at the parts counter to get my parts, I'd been looking around for a week and couldnt find crap in the way of sprockets for my bike....Either way the bike is still technically faster than it needs to be..