does anyone know what size a stock sprocket is for a 98 cbr 600 f3?

 

15/43

LINK-CLICK HERE

 

thank you very much

 

ok so i got the 43 on back not sure about the front yet and my speedo is 10 mph over like im doing 50 but speedo says 60 any idea whats going on?

 

I would guess that the previous owner went -1 in front.

If the gearing is stock, you shouldn't be more than ~5% off (i.e. your speedo would read 60 when you are going 57).
Your bike is currently 16%-17% off, so -1 in front is the only reason I can think of.

If you have $100, then you should invest in a speedohealer.