i hav an 02 cbr f4i and im looking for a new chain and sprocket kit. Im need to know a good brand.... going down 1 tooth n front...... im looking for faster xcelleration...... if thats not rite plz let me kno wat i need 2 do for faster xcelleration......n e other advice im all ears..... thankz n advance....

 

Yes, to get quicker acceleration you can go down tooth in the front or go up teeth in the rear.
Only thing with this is your speedometer will be off and you will be dding more mileage to your bike unless you get a speedohealer.
D.I.D. , and RK are decent brands I'm sure you will gets lots of suggestions already given using search.

 

I just got my sprocket and chain on today...i got the 16/46 teeth and 525 gold chain. I got RK. Looks nice and so far good chain...ill post pics when i can.