KTM   rc390 15-21

Husqvarna  401  vitpilen / svartpilen  18-20


F-Pro Arms and Springs - virtually eliminate missed shifts

our kt9013 arm

actual F-Pro KTM390 shift spring

Hybrid Ceramic Pro Shift Kit

Hybrid Ceramic
Microbearing Shift Detent Arm and F-Pro Shift Spring.
(kit does not include clutch cover gasket)


replaces ktm arm pn: 90134024033 and ktm spring 90134023000

1. Choose your shipping method



F-Pro Microbearing Pro Shift Kit

The stock 390 shift action is described as lazy and soft - even slight accidental foot pressure will slip it out of gear.

Why wait till your first race to discover it.

Missed shifts break gears and bend shift forks.

Hybrid Ceramic microbearing Detent Arm and a slightly stronger F-Pro Blue Shift Spring
Tough steel races and almost friction free ceramic balls

Make shifting quicker and virtually eliminate missed shifts.   Makes  shifting relatively perfect. You should not have to pay attention to your shifting.
 (it's what EBR and most rc8r roadracers use)

Bring your shifting up to high performance  levels.

Reduces shift drum friction for more precise shifting - quicker shifts, virtually eliminates missed shifts.

Takes about an hour to install.
Installation requires taking off the clutch basket to get to the area where the detent arm and spring are located.


Available from Kentucky's Commonwealth Motorcycles, Lee at Vallejo, CA's Mach 1 Motorsports, direct from Factory Pro and through your local KTM dealership.

Hybrid Ceramic Wheel  Bearings

Hybrid Ceramic Bearing set special

reg $300.80

5 bearing kit
2 front wheel, 2 rear wheel and 1 sprocket carrier bearing set

pn: BE-HYCER-KT39/RC390
1. Choose your shipping method
RC390 Hybrid Ceramic Wheel  Bearings

5 bearing set

In theory, these bearings should:
Increase mileage slightly
decrease rolling resistance noticeably
coast farther
slightly improve top speed and acceleration

Tough steel races and almost  friction free ceramic balls.

Bearings have light contact rubber seals that are easy to remove if desired.
  Tuning Notes

race and trackday use only.

Closed Loop area (according to DJ, March 20, 2017)
idle closed loop
2000 up to 60% throttle
3000 up to 60% throttle
4000 up to 60% throttle
5000 up to 60% throttle
6000 up to 60% throttle
7250 up to 60% throttle
8000 all open loop
9000 all open loop
10,000 all open loop






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.