what size are your idle jets(slow jets) and your main jets and what can i benefit from upsizing or downsizing either one? i have a 1995 cbr1000f

 

I don't believe you will gain anything by modifying your jets, unless you've changed your exhaust can, or done engine mods.......Bike is overjetted as standard.
Jet sizes are in the manual.

 

+1 on shadow1's comments

I put a K&N filter, Irridium plugs and a 4-2-1 Stainless system on mine. ( 1991 FL model )

Took it for a set up and was only charged £20 because all he needed to do was alter the mixture screws.

leave the jets alone until you change something.

 

Don't need to mess with the slow jets. When I installed the SS2R system I put in a Dyno-Jet kit. It uses the stock slow jets and the optional main jets are only 1/2 size over stock. The biggest change were the needles and springs on top of the slides.