Suzuki GSX600F Katana, 98-06
Factory Pro Series "S23"

The Carb Recal Kit and the Ignition Advance Rotor perks up the low-end and midrange power and response for quicker warm-up and more response. The Transmission Detent Spring Kit really puts "snap" into the shifting.

Factory Pro's own
Supersport Carb Recalibration Kits
(carb jetting kit)
JET  NEEDLE  (P-OM) Factory Pro's own
Nickel Plated Needle jets
Improve mileage and make run smoother at low rpm
Factory Pro's own
Shift Improvement Kits
Tuning Tools
Factory Pro's own
Ignition Advance Rotor
fixed or patented adjustable
Factory Pro's own
Long Boy Fuel Screw set


Fuel Screws: "Long Boy" E-Z finger adjustable


Katana  600
" Long Boy"  Fuel Screw Set
(set of 4 4030M screws, 4 o-rings, 4 springs, 4 special washers)


1. Choose your shipping method


Long Boy

Extended Fuel Screw Set

Having a hard time adjusting your fuel screws?
Don't have a multi-bent twisty windy screwdriver to find that "all important for cruise"  Fuel Screw adjustment?

Factory Pro's 4 pc. "Long Boy" Fuel Screw Set allows the owner to reach in and quickly adjust your fuel screws for best cruise and idle quality.

4 each Factory Pro 4030M "Long Boy" Katana 600 fuel screws
4 new fuel screw springs
4 new special fuel screw washers
4 new fuel screw o-rings
4 fuel screw shipping protection sleeves

Carburetor Tuning Kits

CRB-S23-1.0  $139.95
1. Choose your shipping method

Standard drop-in carb kit

The kit, when properly tuned, adds more low-end / midrange and if the proper main jet is selected, more top-end power. Easy to install and tune - no slide drilling!

Replacement Needle Jets for carb


GSX600F Katana Needle Jets
(nickel plated, stock replacement)

pn: CRZ-EMU-100192k
(replaces 09494-00921)

$132 / 4 pcs

1. Choose your shipping method


Replacement nickel plated needle jets
(not the long, skinny needle,  this is the part that the needle goes into)

Stock replacement needle jets for high mileage bikes

Help cure over rich running at low rpm. and poor mileage.

pn: CRZ-EMU-100192k
(replaces 09494-00921)

emuwr3.jpg (9351 bytes)

<<<<<<     This is enough wear to cause rich lowend cruise

Ignition Components

RTR-SUZ-4  $89.95


1. Choose your shipping method

Ignition Advance Kit

This simple, bolt-on advance kit advances the timing. With stock engines with stock compression ratios, there is more power everywhere. Part throttle power is better - helping corner exit speeds. Improved in-town drivability and quicker warm-up. REQUIRES an AIR IMPACT wrench to install.
The RTR-SUZ-4 replaces OEM #19C00 and #19C20 original ignition triggers.

Transmission Shift Improvement


1. Choose your shipping method


Trans Detent Spring Kit

Includes Microbearing Detent arm and FP detent spring - Make shifting MUCH quicker and virtually eliminates missed shifts.

Billet Engine Covers -  Factory Pro exclusive!

Billet Engine Cover Set

billet engine covers

$249.95 LH

$129.95 RH

Make your Katana stand out from the rest of the crowd!
Beautiful alloy cover set, milled from fine grain base material.
Just about every magazine "project Katana" uses these covers. No "project bike" would be complete without these covers - and either would yours!


TL-float height gauge   $59.95

1. Choose your shipping method


The only way to accurately measure float heights. Works on nearly every carburetor.


True Rear Wheel Horsepower® Factory EC997a Eddy Current Dynamometer

Looking for your idle mixture screws?  Here is where they are located:

Misc. Information

Ignition trigger OEM part numbers

model/year years original rotor number / notes suggested to use:
GSX600F Katana
88-95 33120-19C00 Use Factory Pro RTR-SUZ-4
GSX600F Katana
96-00 33120-19C20
Similar timing as "19C00", cosmetic change.
Use Factory Pro RTR-SUZ-4
GSX600F Katana
(CA model)
88-93 33120-48B20
Upgrades to 49 state low rpm timing. Improves low rpm / off-idle response.
Use Factory Pro RTR-SUZ-4
GSX600F Katana
(CA model)
94-96 33120-26D00
Upgrades to 49 state low rpm timing. Improves low rpm / off-idle response.
Use Factory Pro RTR-SUZ-4
GSX600F Katana
(CA model)
97-00 33120-19C20
Similar timing as "19C00".
Use Factory Pro RTR-SUZ-4





Absolutely NO carb parts sold in California.

New and improved Suzuki Teka SFI  2

with new TPS display and "MMT" Memory Module Tuner

Finally - Quick, easy, cost effective Suzuki tuning with no expensive "add-on boxes"
Suzuki cruisers and sportbikes

Please click here for more info

Contact Factory Pro
M-F, 9am - 5pm, Pacific time, -7 or -8 GMT

800 869-0497
 USA and Canada

415 883-5620

parts information

EC997 dynamometer information

Product Support /Tech SECTION
click here


Mailing / Shipping address:

Factory Pro
101c Roblar Drive
Novato, CA

And most importantly
Restart back at the HOME page and click on the red box in the top left to find the bike that you want parts for...
restart at HOME page


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EFI and Carb Tuning - Most all FI and carb tuning

by Wheelsmith Racing

Flight Training - train with AMA race winner Todd Harrington.

The Harringtons own American Flyers, one of the most established flight training facilities in the USA.

 8 locations

The Rich Oliver Mystery School will help you discover your hidden inner strength. 
It will challenge you. It will teach you a new way of thinking, and a new way of riding. You can take your riding to an exciting new level!  

We use a variety of proven drills and training techniques. 
Practicing these techniques with our Yamaha dirt track trainers will enhance your abilities both on the track or the street.  

It doesn't matter what you ride or race, the Rich Oliver Mystery School improves everyone's skill level and mindset!

WW2 vintage flying Special

Book a sightseeing flight over the Wine Country or a Kamikaze aerobatic flight or a biplane flight over famous Sonoma Raceway, the Golden Gate Bridge and the San Francisco Bay for one or two during the spring and get a free souvenir t shirt!
(NEW!  Ask about the P-40 flights!)

707 938 2444

Just tell them that you saw this on the Factory Pro website!
Northern California's most unforgettable flying experience.  No experience required.  Open weekends!

The extension of the laboratory for engines of the Swiss Federal Institute of Technology was completed in about 1935. Its architect was Rudolf Otto Salvisberg (1882-1940). He had a successful career in Berlin but returned to Switzerland after the advent of the Nazis. His architectural style was somewhat similar to that of Erich Mendelsohn. The staircase of the laboratory is in normal use but well preserved.
Edited to the tunes of Chemical Residue by Herbie Hancock.