XJR1200  94-98
 XJR1300  99-03 (and probably 04)

(with Mikuni BS36 carbs)


Finger and screwdriver Adjustable "Long Boy" extended Yamaha fuel screws

Long Boy Fuel Screw Kit  $89.95
pn: 3020m1

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

1. Choose your shipping method


"Long Boy"
Finger and screwdriver adjustable extended Fuel Screw

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 o-rings, 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".

Each screw assembly comes with:
4 Long Boy fuel screws 
 4 new o-rings
4 new washers
4 new springs


Emulsion Tubes - drop-in  HDJ style

Yamaha,   xjr1200 / xjr1300

replaces pn:   50h-14141-92-00 and similar

CRZ-EMU-100112k  $168 / 4pcs

1. Choose your shipping method.

Stock Replacement needle jets WITH patented HDJ :High Dispersement Jet fuel atomization feature.

Factory Pro
Longer lasting
nickel plated
replacement emulsion xjr1200 and xjr1300 tubes in stock

The usual solution for poor mileage and overrich low rpm running.

For reference, xjr1300, 1999

Ignition Advancer


1. Choose your shipping method

Ignition Advance Rotor

The easiest way to add more lowend and midrange power.

Bolts on, under the left side engine cover.

Transmission Shift Improvement

(special order)

detent arm: 4YR-181400-000
detent spring: 90508-233B5-00

International orders will be billed additional $18

Transmission Detent Arm Kit



If you are interested in a Pro Shift kit, we will need the xjr part numbers for the original Yamaha parts to see if we can cross reference them to our model shift kit -

email here

Now that you've replaced the 2nd gear, it's mate and it's shift fork - Install this kit to make 2nd gear stay alive for years. Oh - nicer shifting, too.

Includes: Factory Pro Microbearing Detent Arm, Heavy duty detent spring and gasket. Makes shifting more positive at the expense of slightly stiffer shift lever action. The stronger detent spring rotates the shift drum faster, so the gears are more likely to engage under quick shift conditions. The Microbearing eliminates much friction, allowing the shift drum to rotate quicker for fewer missed shifts. Especially helpful in decreasing the 2nd gear and shift fork wear that the FJ1100's, FJ1200's and other bikes with large, heavy transmission gears are so well known for.
This kit fits both FJ1100 and FJ1200.



TL-float height gauge   $59.95

1. Choose your shipping method. 

The only way to accurately measure float heights. Works on nearly every carburetor.
More information on how to set floats, resultant fuel level, it's effect on low rpm fuel delivery, pictures.....
Float Height Page



Tech Tidbits


Float Height Measuring

"touching, but not compressing the float valve spring"

Needle Jet wear
(sometimes called "worn emulsion tubes)
Inspect your brass needle jets for wear when you take out the needles. If the needle jets have oval wear pattern, they will allow excess fuel to pass by the needle causing excess low speed richness.
The fuel will also consist of more, large drops, rather than small drops. Large drops of fuel tend to drop out of the airflow and not burn.
Check out Tech Section for "Needle Jets, Mikuni, worn"


Go to General Technical Support











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...

restart at HOME page


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Flight Training - train with AMA race winner Todd Harrington.

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It doesn't matter what you ride or race, the Rich Oliver Mystery School improves everyone's skill level and mindset!

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