Hi i got a 99 cbr f4 i want to do a chain and sprocket kit on it due to mine being junk im not sure what to do... i no i want to do -1 in the front but not sure if i want + 2 in the rear or stock can you give me some insite on what would be different about both thanks

 

first i would go with DID chain...but that's my preference.
as far as the +2 in the rear...do you do a lot of highway riding or just all around town? if you do a lot of highway then i wouldn't do the +2 in the rear.

 

Going down in front is equivilent do going up two in the back. So if i were you i'd go down one in front and leave the rear stock. I think you can get a 520 chain conversion kit for your bike that would probably help out alittle.