Long Boy Extended Fuel Screws - easy

It's a sample pic - the gs / gsx fuel screws are on the top of the carbs.

"Long Boy"

Finger and screwdriver adj. extended Fuel Screw Kit

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 screws, old orings, old washers 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 kit comes with:
4 Long Boy fuel screws
 4 new o-ring
4 new washer
4 new spring

Long Boy Fuel Screw set

pn: CRZ-SCR-SUZ-5020ms16
single taper tip profile


 with 4 new screws, springs, washers and o-rings

1. Choose your shipping method


There are 2 documented fuel screw types

If your original screw looks like this,
with a single tip taper, get the "5020ms16" to the left.

original screw has 6 x 0.5mm thread,  22mm length and
single taper

 Fits SOME Suzuki with BS34 CV carbs
GS750 (80 and up)
GS850 (80 and up)
GS1100  80-83
GS1150 84-86
  6 x 0.5mm thread
20.6mm length
double step taper

Fits THE OTHER Suzuki with BS34 CV carbs
GS750 (80 and up)
GS850 (80 and up)
GS1000 (80 and up)
Carburetor Tuning Kits


for if you are running the stock airbox
1. Choose your shipping method


The famous Factory Pro "Supersport" jet kit -

No slide drilling

Use with the stock airbox, a stock or K&N stock replacement air filter and a stock or aftermarket exhaust.

This kit, when properly tuned, makes better lowend and midrange than the dynojet kit.


(does NOT include air filters!)
1. Choose your shipping method


Config 30 / Stage 3 carb kit
No slide drilling

Use with INDIVIDUAL BMC or K&N filters and a stock or aftermarket exhaust.

This kit, when properly tuned, makes better lowend and midrange than the dynojet kit.
Does NOT include the pictured air filters.

Transmission Shift Improvement

(verified 11/1/00mws)
1. Choose your shipping method


Trans Detent Arm Kit

This Shift Detent Arm kit includes the Factory Pro Shift Spring and the Factory Pro Microbearing Detent arm

You ever miss second gear? Ouch! - poor bike! Miss it hard once and you bend the shift fork a little bit. Every time you miss that gear, the shift the fork bends a little bit more. Eventually, you will have to replace the 2nd gear fork, the gear that that the fork slides into and the gear that the sliding gear mates to! Bummer.
Prevent missed shifts and damage before it happens.
Make shifting MUCH quicker and virtually eliminate missed shifts. This is the same type of kit that Factory Pro, Honda, Kawasaki, Suzuki and Yamaha Racing has used.


TL-float height gauge

$59.95 USD

1. Choose your shipping method


The only way to accurately measure float heights. Works on nearly every carburetor. Float height measurement affects the fuel level in a carb - Fuel level controls the amount of fuel that the carb delivers at low rpm and cruise.

Looking for your idle mixture screws?  Here is where they are located:




Absolutely NO carb parts sold in California.

New and improved
Suzuki Teka SFI 2
with new TPS display and "MMT" Memory Module Tuner feature

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

no fax

Factory Pro
101c Roblar Drive
Novato, CA

If it's
4pm at Factory Pro it's 9am in eastern Australia.

parts information

EC997 dynamometer information

Product Support /Tech SECTION
click here

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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