300 Ninja

Our first ex300s and  -  6 bikes  -  many  tracks  -  6 riders  -  "a whole lotta" wins -  many championships

November 2014
Pro Shift Kit and race prep clutch plates.
Hey man. Just thought I'd update you. The bike is doing really really well. Thanks again for your tips. The bike feels really good
Archit Kumar
New Delhi, India

Factory Pro


a lots bikes - a buncha riders - 3 tracks
"a whole lotta" wins
  Ceramic Wheel Bearings 
Virtually Eliminate Missed Shifts
false neutrals  -  fix in an hour.
(works with quickshifters, too)

Unleash your bike's power and control

Factory Pro
Race bike ECU Reflash

  • adjust IAP Fuel Maps for better race part throttle
  • adjust TPS Fuel Maps for better race power
  • adjust Ignition Maps for more race torque
  • Secondary Throttle Plate (STP) Opening Maps
  • Fuel Trim Maps for racing
  • Adjust RPM Limiter
  • Disable Top Speed Limiter if present (n/a on a 300! :-)
  • Disable Stock O2 Sensor for racing
  • MS0 map  light gr / bk ungrounded
  • MS1 map  light gr / bk grounded

 "a whole lotta" wins

Derek Powell 2017

Phenomenal? - Delimit your trackday or race bike.

Remove high rpm power restrictions
Change rev limiter
Modify STP, ignition timing and fuel tables

"Phenomenal"? That may be pretty impossible to do on a 300 with an ecu reflash!
But when you are talking small displacement bikes, a 2 to 4 hp increase in part throttle, midrange or peak power might easily be 5% to 10% better than a  stock or inelegantly reflashed ecu.

Some things are not possible to tune on a dyno and require track feedback to refine - that's why a simple "delimited" ecu reflash doesn't provide that last 10% of power or silky driveability that a track refined ecu reflash provides.

We have all learned that each bike, even with the same aftermarket parts, requires different mapping than it's identical twin bike. That's why when someone  "downloads the perfect mapping" off of some website for a pc or Bazzaz, that it only has a 10% chance of being perfect "on YOUR bike".
With 35+ years of tuning experience, Factory Pro knows the key to silky smooth and strong  running - That's why we do tuning for people all over. Except CA streetbikes.




I wanted to let you know that I took 3 championships in 2017: Nv 250 SBK, Lightweight Twins, and World SuperSport 300.  Also, I finished 2nd in 350 SuperStock and 3rd in Formula III.  In the total novice points race, I was 7th overall (out of about 100+).  

I also wanted to say thank you again for the support this year, and I am looking forward to next season. 

I will be in touch,

Derek Powell

Positive feedback rating

from Austin Guinn 2 class championships 2014 AFM
F-Pro Shift Kit, QS shifter tuning, Reflash ECU, removed power robbing Autotune system, retune Power Commander to match ECU

Marc Salvisberg knows his stuff.
He made my stock ninja 300 into a two class championship winning machine. After Marc tuned it I never finished less than third place.
Positive feedback rating

December 2016

Hi Marc,
Hope all is well. We had a very successful season on the LW300s. Won the TrackAddix season Championship, our bikes went 1-2-3. Also swept the podiums 1-2-3 at Road America and Daytona in LWTB, and LWGP. Nice work on the ecu flash, it is an important part of the build.

My best,
Randy Sullinger
Randy Sullinger

 ex300  mail in ECU

Delimit - generic    $200

remove speed limit if present -
change rev limit -
 STP secondaries set to 100% on both acc and decel -

Race ECU reflash - semi custom - mail in ecu

Subtle modification of STP acc and STP decel tables
 subtle ignition table mods
unify fuel and ignition tables
raise rev limit a bit
elim O2 sensor light for race use

Race Winner -   mega wins - buncha riders - lotsa  tracks -  championships

not CA street legal

(April 2015: ex300 reflash ecu guy says his bike is was better. More mid-range. better on off throttle. He says thanks !  ref: Paul F.)


(415) 491-5920 mail in

Reflash and TUNE to Best Power - custom tune on ec997 dyno
(not power losing autotune to an AFR)

Subtle modification of STP acc and STP decel tables
 subtle ignition table mods
unify fuel and ignition tables
raise rev limit a bit
elim O2 sensor light for race use

Race Winner   -  4 championships

Custom Tune FUEL maps to your race bike
 with your Power Commander + race only reflash.

not CA street legal


(415) 472-4962

Simple delimit:
100% Secondaries, raise rev limit, unify fuel and ign maps, blanket ign mod


(415) 491-5920 mail in

not CA street legal



(415) 472-4962 or  (800) 869-0497
m-f, 9-4 pacific time

(for dynojet hp scale: multiply True x 1.15 = ~40 djhp)

Help Stop Missed Shifts  and prevent False Neutrals in hard use -  Factory Pro Detent Arm Shift Kit


 Hybrid Ceramic
Detent Arm and F-Pro Spring Kit



1. Choose your shipping method


F-Pro Hybrid Ceramic Microbearing Shift Detent Arm and F-Pro Shift Spring

Race Winner -  a lotta bikes  -  a lotta riders  -  a lotta tracks   -  a lotta wins -  a lotta  championships

Improve lazy shifting - virtually eliminate missed shifts - virtually eliminate false neutrals -  help prevent gearbox damage caused by missed shifts.

Note: Make sure to adjust Quickshifter kill duration shorter  to match quicker shifting- or you will still miss shifts.

Positive feedback rating
from Austin Guinn 2 class championships 2014 AFM
F-Pro Shift Kit, QS shifter tuning, Modify ECU, retune Power Commander

Marc Salvisberg knows his stuff.
He made my stock ninja 300 into a two class championship winning machine. After Marc tuned it I never finished less than third place.

Positive feedback rating
From: Archit Kumar [mailto:axxxxxxxxxr@gmail.com]

Sent: Monday, October 27, 2014 04:52 AM     To: marc@factorypro.com
Subject: Re: Ninja 300 detent arm kit

hey man,
installed the detent arm and spring today.
THANK YOU THANK YOU THANK YOU for coming up with this amazing little mod.
it has made a world of a difference and your tip on the clutch also is working amazingly.. no more slippage, miss shift or false neutral..this has been one of the best mods ever.
thank you once again

Positive feedback rating

Tough, Precision manufactured new detent arm and slightly stronger shift spring
Less friction. Quicker action.
Super compact, permanent, better than "factory",  No loosening.

"Virtually Eliminate missed shifts"

ex300's can use a kit to help them not miss shifts under race conditions-
Each missed shift stresses the gear engagement dogs and slots, bends shift forks and otherwise causes extreme shock loading to the entire drivetrain. And hurts lap times.

This kit includes the new Factory Pro Microbearing Detent Arm and new F-Pro Shift Spring.
 Does not include clutch cover gasket. 

1-2 hours to install. Requires that the clutch cover and clutch basket be removed and replaced. No case splitting required.

pics courtesy of Juan Gooch.

Hybrid Ceramic Wheel Bearings

(compare at $325 to $400)

5 bearing kit

font and rear wheel + sprocket carrier

pn: BE-HYCER-K35
1. Choose your shipping method

Hybrid Ceramic Wheel  Bearings

5 bearing set

2 front wheel bearings
2 rear wheel bearings
1 sprocket carrier bearing

Tough steel races and almost  friction free ceramic balls.

Bearings are pregreased and ready to use.
Bearings have rubber seals that are easy to remove if desired.


Test ex250:  +1.5  /  5% at +100 mph
Oil Additive

$30 / 4 oz bottle

Anti Friction
4 oz treats 3 to 5 qts synthetic oil

1. Choose your shipping method
As I recall -

After running Number 8 in over 100 AMA and WERA bikes, we gained from 2% to 3% power,

The least gain I saw was 1% (JR's super loose built engine) and the most I ever saw was 4% (on a super tight street  built engine).

The other 98 bikes picked up 2% to 3% power - with most 2% and  2.5%

Lasts 2 and up to 3 oil changes (tapering off in effect).


Tuning Methodology

If you want best power, Autotuning is common, but isn't the best tuning method.

Why autotuning is not the first choice of tuning methods.

In the EC997 dyno chart to the right, the Blue line is power when "autotuned to an Air Fuel Ratio".

The Red line is retuned on an ec997 dyno, tuned to best power, 1.4 True hp /  4% better power at 11,000 rpm and more lowend.

Some areas of autotuned fuel tuning were at +50% fuel and the engine really wanted to be
-10% fuel. A 60% error in tuning!

Autotune: Not the first choice of tuning methods.
In 1970, 1980, 1990, 2000, 2010 or 2017.

RED = Tuned to best power
BLUE = autotuned to an AFR

The dip at 9000 is not carburetion or ignition timing, it's caused by a conflict in cam timing, crossflow, intake tract or exhaust dimensions.


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

415 491-5920

parts information

EC997 dynamometer information

Product Support /Tech SECTION
click here


Mailing / Shipping address:

Factory Pro
179 Paul Drive
San Rafael, CA 94903

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.