Pablo's gs500 page
More on re-jetting your carbs
R1 taillight install on 89-00 gs500
Clear Taillight Lens for 01-03 Models
My Local Canyons
What's it worth?
Progressive fork spring install-the lazy way
Rear shock swap information
More rear shock info-SV650 install
Suspension tuning 101
Installing Suburban-Machinery SV650 handlebars
Install an SV650 headlight
Converting standard 1/4 throttle to 1/5 throttle
Installing LED's in stock taillight
Uber Fender Eliminator
R1 Taillight on 89-00 GS500
Speedo/Tach light replacement
Better handlebar grips
Installing Buell turn signals - Rear
Installing Buell turn signals - Front
Flush mount rear (stock) turn signals
Installing a 2001 Ducati Monster fairing
Fix a broken oil filter cap bolt
General battery info
A Wal-Mart sealed battery?
Chain Maintenance
Installing SV650 Chainguard
Spark plug information
Installing a GSXR front end
Installing a GSXR swingarm
Installing GSXR rear passenger peg brackets
Installing an OEM Bandit 400 rear hugger
Installing a Bandit 400 rear wheel
Installing a GSXR rear wheel-simple swap
Polishing your wheels
"The Mystical Art of Tire Reading" and other tire info
General tire info for the GS #1
General tire info for the GS #2
General tire info for the GS #3 - mixing brands/types
gsJack's opinion on tires for the GS
Gearing and sprockets
Slip-on mufflers
Slip-on exhaust : using stock SV650 muffler
Installing an R6 tail
Installing GSX-R600 stock rearsets
Installing CBR600 stock rearsets
Replacing stock front pegs with CBR pegs
Replacing stock front pegs with Katana pegs
Why re-jet a stock US bike
More on re-jetting your carbs
Jetting for 2001 models
Links's own Srinath and his great jetting formulas
(don't buy a jet kit)

My jetting formula is simple and the line of thought is also quite elementary.
Here goes...
All countries except US (even canada) had 40 pilot jets. That is on a fully stock bike. So first thing to do even if the bike was entirely stock is that.
Pipe and air filter affect the top 1/2 of the rev range. They have minimal effect below 3K and completely transform the mid-top end.

1 size bigger mains (125 up from 122.5 stock) with a UNI in the airbox and pipe, and 1 washer under needle raising it 1/2 mm.
2 sizes bigger mains (127.5 up from 122.5 stock) with a K&N in the airbox and pipe and 2 washers under needle raising it 1 mm.

Anytime you tweak the pilots you want to have the option of resetting the air mixture at idle. So take out the brass plug that they put on the air screw so you can fiddle with the air screw...Set it to 3 turns out.
That should do it.

If you want to do a stage 3 - Take off the airbox and put K&N's on instead then you need 150 mains. The rest is all the same as the K&N's in the airbox.

Special thanks to Srinath at