hybrid CERAMIC  
Microbearing Detent Arm

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SHFT-ARM-RM-Z250 / kx250f-04-06
STD STEEL Bearing Detent Arm

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F-Pro Microbearing Detent Arm

Hybrid Ceramic or standard Steel microbearing bearing

Tortured by false neutrals and missed shifts? 
They always happen at the worst times.

Part of the shifting problem is that there is just too much friction in the shift mechanism. Factory Pro produces a detent arm with a slick rotating ball bearing instead of a scratchy riveted disc.

Reduce ugly and unattractive friction.

Reducing the rotating friction allows the shift mechanism to rotate quicker and get the gear dogs more fully engaged - so they stay engaged under part throttle (as in when you are 15ft in the air over a set of triples).

Can't promise 100% elimination of missed shifts, but this arm is the first step in helping the 250 develop a bulletproof transmission.

Marc "No missed shifts" Salvisberg
Factory Pro Tuning


 EVO Shift Star

pn: SHFT-STAR-S25 star only

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EVO Shift Star
Helps speed up shifting because the shift drum rotates quicker between shifts. Combine with the F-Pro Microbearing Shift Detent Arm for the sweetest results.

Factory Pro







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
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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
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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.