ZXR400H   89-90
ZXR400L  91-03

Models include and more till 03:

1989 H1 introduction
1990 H2 Engine modified
1991 L1 Green/blue/white and metallic blue, single headlight unit, modified styling
1992 L2 Red color scheme added, new gearbox, six speed introduced
1993 L3
1994 L4 Black/purple/red and green/white/blue color schemes
1995 L5 Same color schemes from previous year
1996 L6 Unchanged
1997 L7 Unchanged
1998 L8 Black color scheme
1999 L9 Green/white color scheme

Carb Recalibration


ZXR400H   89-90
ZXR400L  91-03
1. Choose your shipping method


Specially developed to address the cv carb "bog" issues.

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.

Even though the 400 is not a USA domestic model, the Factory Pro 400 kit has become the recognized superior tuning solution - across the world.


SHFT-EVO-K36-KT-c   $239.95
(this kit includes K36 STAR, 16mm Ceramic microbearing 1243 detent arm, high performance  045 shift spring and clutch cover gasket)

1. Choose your shipping method


Shift STAR kit

This EVO shift star kit virtually eliminates missed shifts and decreases shift time by as much as 20% (~10ms) - Every ms of time of power applied is important on a race and trackday bike.
Virtually eliminates missed up and down shifts.

Note - if using a quickshifter, you must shorten shift kill duration BY 5 to 10ms,

 Install is 1-2 hours and involves clutch basket R&R - no case splitting required

Positive feedback rating    Oh, the shift star works great.  I mean the Kawis have always been a bear to shift.  And the EVO cleared that up.  Love it -
Thanks -  Douglas  Isham  …

Tools : diagnostic and setting

TL-float height gauge

1. Choose your shipping method

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

kawasaki rotor ref:

 21007 1189  for model L (91-99)

21007 1198  for model H SP (89-90)

We don't have the zxr400 in the USA and need carb specs and years produced for this page. If you can help, feel free to email me - Marc


ZXR400H   89-90
stock carb specs?
ZXR400L 91-03
pilot 35 (21)
float 11mm +/- 2mm
needle n77s  (1994)
mains 4 x 95

Are these the correct stock "L"carb specs?


Olivier Krausz 2018  France



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


This Tuning Site has been visited by
www.digits.net - the oldest counting service on the web





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.