so enlighten me on why -2 is too much? is it because its too tight of a throw for the chain and it sliings all the lube off? causes vibration? ticking timebomb?

 

Hey, one more question, i'm about to order a sprocket and i need to get the size of the chain first.. is there a sure fire way of telling the size of the chain without seeing it stamped on the chain.. cause i couldnt find it anywhere.

 

Your gonna need a new chain aswell or some more links as your going back stock which will take up chain slack. I dont think you will have enough chain slack to go back up 2 teeth. Then if you have to do that why not just get a new rear aswell so everything matches up and wears together.

 

+1 on replacing everything together. Unless they are all relatively brand new. Bad chain wears out sprockets & bad sprockets wear out chain.

My F4: 15T & 47T = speedo is 8mph fast @ 60mph. Finding this kind of bummed me out because now my bike really doesn't go 180. Haha JK.

 

So adding to the tooth count for any rear sprocket adds to the already INFLATED speedo reading?

 

larger in the back. more acceleration. same as dropping teeth in the front. the bike thinks its goin the same speed, but its actually goin slower.

 

1 teeth in front is the same as 3 teeth in the back

http://www.gearingcommander.com/ try this.