Kawasaki KLX250s 09-14


Great 250 - AND it's CARBURETED - so a $70 carb kit accomplishes tuning and avoids the electronics goofiness and twitchy throttle of fuel injected bikes.
(little known fact - research revealed that the last carbureted cars were generally as clean as fuel injected cars were)


Long Boy Extended Fuel Screw

Long Boy Extended Fuel Screw
pn: CRZ-SCR-3518k2
 with 1 new screw, spring, washer and o-ring

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"Long Boy"
 Finger adjustable and screwdriver extended Fuel Screw assembly

Frustrated with trying to find an "almost 90 degree"  screwdriver to fine adjust your fuel screw for best idle and cruise?
Use Factory Pro's new "finger adjustable" fuel screw to adjust fuel screw for best throttle response. Traveling to high altitude? It's easy to lean out the lowend temporarily.

Make your life easier.

Remove old short stock fuel screw, old o-ring, old washer and old spring. The o-ring might be stuck in the carb, so take a light and make sure it's really out  (or you can't find it after you took out the screw)
Use a small bent wire to pull it out if it doesn't drop out. Keep the old parts for "spares".

Each Screw assembly kit comes with:

1 long Boy Extended Fuel Screw
1 new spring
1 new washer
1 new o-ring





Australian 2012 klx250's have a water hose for warming the carb fuel for start emissions.
Need to rotate that squeeze hose clamp - It's a tight fit with the screw.

Stop Missing Shifts - Factory Pro Shift Kit - in stock - easy install

06-14 KLX250s Shift Detent Arm  $69.95

(in stock)


(installed and tested on a 2012 250 with excellent results)

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Positive feedback rating    SUPER GREAT,BETTER SHIFTING,THANKS     ktmchazb

Positive feedback rating    Shifting is way more positive even when downshifting. Shifting is like a KX250 now.
I took my time installing it and it took about 2 hours. The hardest part was getting it behind the spring but with the change in shifting, it was worth the trouble.
I could change the next one in an hour.
Charlie Burk
Flora, IL


Microbearing Detent Arm

"Virtually Eliminate missed shifts"

Positive feedback rating    SUPER GREAT,BETTER SHIFTING, THANKS     ktmchazb

klx250's have notoriously poor shifting and can use a kit to help them not miss shifts  -
Each missed shift stresses the gear engagement dogs and slots, bends shift forks and otherwise causes extreme shock loading to the entire drivetrain.

This kit includes the Factory Pro Microbearing Detent Arm.  Does not include shift mechanism cover gasket. 1-2 hours to install. Requires that the chain and sprocket and shift mechanism cover be removed and replaced.
No case splitting required.

(stock arm)

extra development notes (for me...Marc)
92144-1695 SPRING
2006 KLX250H6F KLX250S 
2007 KLX250H7F KLX250S 
2009 KLX250T9F KLX250S 
2009 KLX250W9F KLX250SF 
2010 KLX250TAF KLX250S 
2010 KLX250WAF KLX250SF 
2012 KLX250TCF KLX250S 

FP Detent Arm may also may fit these models:

1990 ZX600-D1 Ninja ZX-6 

1991 ZX600-D2 Ninja ZX-6 

1992 ZX600-D3 Ninja ZX-6 

1993 ZX600-D4 Ninja ZX-6 
1993 ZX600-E1 Ninja ZX-6 

1994 KLX250-D2 KLX250R 
1994 ZX600-E2 Ninja ZX-6 

1995 KLX250-D3 KLX250R
1995 ZX600-E3 Ninja ZX-6 

1996 KLX250-D4 KLX250R 
1996 ZX600-E4 Ninja ZX-6

1997 KLX300-A2 KLX300R
1997 ZX600-E5 Ninja ZX-6

1998 KLX300-A3 KLX300R
1998 ZX600-E6 Ninja ZX-6

1999 KLX300-A4 KLX300R
1999 ZX600-E7 Ninja ZX-6

2000 KL250-G4 Super Sherpa
2000 KLX300-A5 KLX300R
2000 ZX600-E8 Ninja ZX-6

2001 KL250-G5 Super Sherpa
2001 KLX300-A6 KLX300R 
2001 ZX600-E9 Ninja ZX-6 

2002 KL250-G6 Super Sherpa 
 2002 KL250-G6 Super Sherpa 
2002 KLX300-A7 KLX300R 
2002 ZX600-E10 Ninja ZX-6 

2003 KL250-G7 Super Sherpa 
2003 KLX300-A8 KLX300R 
2003 ZX600-E11 ZZR600 

2004 KL250-G8 CANADA ONLY 
2004 KLX300-A9 KLX300R 
2004 ZX600-E12 ZZR600 

2005 KLX300-A10 KLX300R 
2005 ZX600-E13 CANADA ONLY 

2006 KLX250H6F KLX250S 
2006 KLX300A6F KLX300R 

2007 KLX250H7F KLX250S 
2007 KLX300A7F KLX300R 

2009 KL250G9F Super Sherpa 
2009 KLX250T9F KLX250S 
2009 KLX250W9F KLX250SF 

2010 KLX250TAF KLX250S 
2010 KLX250WAF KLX250SF 


2012 KLX250TCF KLX250S 

Carb recalibration kit / jetting kit

(KLX250, 09-14)
(regular $69.95)
fits 09-14 S and 09-10 SF

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You think that off road CV carbs always have a "bog"?

Not if they are tuned correctly.

We use the (apparently) industry exclusive EC997 development dyno with the integrated 5 gas EGA for development - not a dealership level "tune to an AFR" dyno. We get the most gas and power information as we can possibly get when designing new carb kits. That's probably why Factory Pro carb kits were the overwhelming choice of AMA Pro roadrace teams in the last days of street carbs. (the experience and knowledge gained transfers nicely into the off road market)

Standard drop-in kit, using the stock airbox, with or without the snorkel,  and stock, K&N or UNI type stock replacement air filter.  The kit has enough jets to use with an aftermarket "street" or "race" exhaust - and also, the stock exhaust.

No slide drilling is required.

inc: pilot jet, main jets, Celmat30 needle, extra clips, shims, float bowl allen screws, etc.

Like our other 250 kits, it's a Best Buy.

09-14: Keihin CVK34, EF carb, 35 pilot jet, NNLA needle, 118 mj
11-12: Keihin CVK34, EF,

TL-float height gauge  $59.95

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The easiest way to set float height - important when tuning for max mileage and low rpm tuning precision.

click here for "how to"




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.