Ninja 250r
(non usa fuel injected model)

Virtually Eliminate Missed Shifts
false neutrals in an hour.
(works with quickshifters, too)
http://image2.cccme.org.cn/i_supply/2010/7/6/2010122602022725549_125637846.jpg Ceramic Wheel Bearings 

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


Ninja 250r  13-15
(non usa fuel injected model)

Hybrid Ceramic Detent Arm and F-Pro Spring Kit

Hybrid CERAMIC Bearing


1. Choose your shipping method


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

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

Positive feedback rating
From: Axxxxt Kxxxr [mailto:axxxxxxxxxr@gmail.com]

Sent: Monday, October 27, 2014 04:52 AM     To: marc@factorypro.com
Subject: Re: Ninja 300 detent arm kit (same kit as 13-15 ex250)

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, mis 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"

ex250'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.

Hybrid Ceramic Wheel Bearings

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

Special Pricing

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

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 tuning were at + 50% and the engine really wanted to be -10%.

Autotune: Not the first choice of tuning methods.
In 1970, 1980, 1990, 2000, 2010 or 2014.

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.
Sorry - had to trace over the Red trace as it got muddied when pic was resized.



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.