2002 Kawasaki KLX 300 R photo KLX300, 97-06
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 and screwdriver adjustable 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


Help Stop Missing Shifts  -  Factory Pro Detent Arm Shift Kit


KLX250 / KLX300 Shift Detent Arm Kit
(immediate delivery - no core charge)

SHFT-PRO-K03-arm    $69.95

(installed and tested on a 2012 250 with good 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

From Factory Pro - the originator of motorcycle shift kits.

F-Pro Microbearing Shift Detent Arm

Positive feedback rating    SUPER GREAT,BETTER SHIFTING,THANKS     ktmchazb

Tough, Precision manufactured new detent arm.
Super compact, permanent, better than "factory", pressed in rivet bearing retainer system. No loosening.

This is not a "kit" to modify your arm, it's a 100% new arm. No core charge or drilling required.

"Virtually Eliminate missed shifts"

klx300's 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 new Factory Pro Microbearing Detent Arm. Does not include shift mechanism cover gasket.  About 1 hour to install. Requires that the chain and sprocket and shift mechanism cover be removed and replaced. No case splitting required.

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


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.