Carburetor extended Long Boy Pilot Fuel Screw 


Long Boy Fuel Screw

pn: CRZ-SCR-5020m

 with new spring, washer and o-ring

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"Long Boy"
Finger adj. extended Fuel Screw

(replaces Suzuki part #13279-47040)

ALT125 1983-1984

LT-F160 89-01

LT-F230 Quad Runner 85-92

LT-F250 Quad Runner  88-96 99-01

LT-300 86-87 99-02

LT-400 87-95

LT-500  98 02

LT-A500F Quad Master 2000-2001
LT-F500F  Quad Runner  98-02

Frustrated with trying to find an "almost 90 degree"  screwdriver to fine adjust your fuel screws for best idle and cruise?
Use Factory Pro's new "finger adjustable" fuel screws to adjust fuel screws 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 (if it didn't come out with the screw 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".

Fuel screw assembly comes with:
1 Long Boy fuel screw
 1 new o-ring
1 new washer
1 new spring

Replacement Needle Jet / Emulsion Tubes for carb


LT-F250 Needle Jet - nickel plated
(stock replacement for 09494-00921)

$24 each
1 piece

1. Choose your shipping method

Replacement needle jet
(not the long, skinny needle,  this is the part that the needle goes into)

Stock replacement needle jets for high mileage carbs. Replace the worn needle jet to help with excessive low speed richness.

Help cure over rich running at low rpm. Make mileage come back up and improve low speed running.

emuwr3.jpg (9351 bytes) <<<<<<     This is enough wear to cause rich lowend cruise









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...
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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.