yzf-R7 (virtually required for racing)





Launch like Cory Texter 2022
ECU reflashing and tuning

WE can: Unrestrict the ECU
Remove / modify speed limiters
Modify ignition timing

microbearing detent arm

Decreased friction
Slicker shifting
Quicker shifting
Virtually eliminates missed shifts and false neutrals


Dirt track / roadracing Pro shift kit

Pro Shift Kit

pn: shft-pro-y70  (with ceramic bearing)

replaces oem: 1ws-18140-00 arm
90506-18021 shift spring

F-Pro ceramic
microbearing Detent Arm
F-Pro z95-y18921
Shift Spring
1 thin
17mm shim
thin circlip
w / hybrid ceramic bearing
1. Choose your shipping method


A small bore dirt tracker or roadracer must shift well.

Virtually eliminates missed shifts and false neutrals.

Shifts about 5ms quicker. More power delivered per lap.

Proven concept in AMA roadracing and off road racing.

Installs behind the clutch basket. Simple.

Avail with std hybrid ceramic bearing.

Note: You need circlip pliers to remove the circlip on the shift shaft.  The circlip holes are about 1.5mm to 1.6mm (in other words, pretty darned small)

remove  clutch basket'
remove the shift shaft (held in by e-clips on the left side of the engine)

Now, you can use  circlip pliers
and remove the 17mm circlip, 17mm x 1mm, and the stock arm and another 17mm x 1mm shim

Then, you can reassemble with the new  parts in this order:

new, ..037" circlip
1  17mm x 1.0mm  (re-use a stock shim)
the  new detent arm
1 new 17mm x .5 mm thin shim
stock collar 


 ECU Reflash - unrestrict

ECU reflashing service for non-CA bikes - unrestrict

Standard Flashing Service:
(Full Exhaust)

Standard Flashing Service:


Semi-Custom Flashing Service

Track use only - flashed to order if desired

$375 + $160 dyno special
reg $425 + $160 dyno

(415) 883-5620

- Standard engine braking reduction
- Disable Injector Decel Cut
- Removal of gear based power restrictions, our electronic TRE
- Optimized timing maps for 91+ octane
- Reduce Fan Temps
- Rev limit changes

Factory Pro (800) 869-0497

Notes about REFLASHING:
"REFLASHING" is a buzz word. That's great - on some bikes, there are nice gains to be had by changing some basic program functions, resulting, on some models of bikes, pretty decent increases in performance.
What REFLASHING isn't, is fine tuning of the fuel and ignition tables. What is supplied in a retail REFLASH is a programmer's guess at what may have been best on maybe one bike (under maybe only dynojet dyno loading, maybe only to some supposed "AFR"). It's not a professional "tuner's" fine tuning effort.

Oh, let's be honest. Some REFLASHERs I've talked to were simple resellers of some other guy's stuff who claims he's able to perfectly tune your bike without dyno tests and claims to be able to tune your with "whatever pipe" and "whatever cam timing" and "whatever" other variable........ and that's ludicrous.

The most realistic reflashers will tell you that the bike will commonly (usually) need fine tuning for the best real world performance and that is our experience.

Fine tuning after a reflash is the way to go for the best performance.


Clutch Cover Gasket 


$12.00 Intro Special

1. Choose your shipping method






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
people. - 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.