My -1+2 tops out at 143. The bike was a whole different animal after the change. Before that, I was running just a -1 and didnt see much difference at all in bottom end.

 

i would check out www.sprocketcenter.com, they have kits you can get for the f4i where you select the # of teeth and the chain width and it comes cut to length.

 

I took the cover off of the front sprocket and found out that I already have a 15t front sprocket. I guess I need to just add 2 to the back. My speedo is already off from just dropping the one. It was actually in the 50s today so I got to ride for a bit. I had my wife follow me in the car to check the accuracy of my speedo. The speedometer said 60,but I was actually doing 48

 

hey axsys... just looked at the website.. do u suggest any of the kits? i need to replace chain and sprocket and was going to do -1 +2.