Yamaha FZR1000, 89-96
USA, CA, CN and all others including 3gm


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.

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"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


part number description
Needle jet - 100120K
(also called emulsion tube)

See desc.
needle jet desc

$132 set of 4

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The famous plated "emulsion tubes" (needle jets)

Original replacement style

The needle jet orifice can wear oblong in as little as 10,000 miles on 38mm Mikuni's and is particularly aggravated by "in town", low rpm operation. The result is excessive richness at low rpm that can be partially compensated for by lowering the fuel level.
A direct replacement for worn, original items. Accepts standard Mikuni jetting or our Factory Pro Carb Recal Kits.
 Also, can fit Ducati, XTZ750, TDM850, and YZF750.

CRB-Y06-1.0   $139.95
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STD drop-in carb recal kit

Boosts power a bit at full throttle, improves throttle response - especially at low rpm and part throttle, smoothing power delivery. Engine runs a bit cooler and smoother. No slide drilling required.
Use with a stock air filter, BMC air filter or Uni or K&N stock replacement air

CRB-Y06-1.1-TI    $169.95
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Ti ProKit

The same as 1.0 kit, but with Titanium needles and stainless screws, drop-in kit.


$149.95 w/o filters
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Config 30 Carb Recal Kit

For the most power, remove the stock airbox and replace it with individual filters.. Use with aftermarket exhaust, makes best maximum power. Low-end and midrange remain good on the YZF1000 without the airbox - when jetted properly.

air filter set for #3.0 kit
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Cleanable, Dual Style BMC filters feature more surface area than other filters for less intake restriction and up to 2hp additional on the fzr1000 as compared to other cleanable, gauze type filters.
If you have inspected a set of used, non-BMC clamp-on dual inlet air filters, you will likely notice that the inside rubber flange was pulled up and distorted when the clamps were tightened. The BMC filter is spaced more properly for the FZR as compared to other brands of individual air filters and doesn't distort air filter flanges, lessening the chance of allowing unfiltered air to enter the engine.
FYI: BMC-3092 specs:
61mm carb bellmouth OD, 25mm between carbs, 85mm center to center dist.
.outer Bell diameter inside width,
bell OD. to bell OD. outer Bell diameter stock CV Carb60mm25mm60mmBMC~61mm~25mm~61mmother gauze~61mm~23-24mm~61mm

Float bowl gaskets

reference: 3gm-14997-00-00
$32 for 4
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(inc F-Pro Microbearing Detent Arm, F-Pro Shift Spring, clutch cover gasket)


Legacy Series
(allow up to 2-3 weeks before shipping)

replaces arm 36Y-18140-00-00 and

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Pro Transmission Detent Arm Kit

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 quicker, so the gears are more likely to engage under quick shift conditions. The Microbearing removes friction for the quickest shifting short of an air shifter.
This kit helps prevent  2nd gear missed shifts that FZR1000's are prone to when shifted quickly. Missing 2nd gear under hard acceleration will bend the shift fork - making subsequent shifts into 2nd gear even more inconsistent.
Help prevent  excess shift fork and gear dog wear with this kit.

TL-float height gauge  $59.95 USD

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The only way to accurately measure float heights in mm.

Works on nearly every carburetor.

Marc recommends.

This Carb Recal Kit developed on the same EC997a Eddy Current dyno that developed the K59-1.7-RK ZX-6R RaceKit (Muzzy and Kinko's choice), the Y73-1.7-RK YZF750 (Vance and Hines choice), S37-1.7-RK GSX-R750, Suzuki of France and most of America's privateer racers choice)...

Low Inertia EC997 Eddy Current Dyno in operation in Switzerland at Pichard Racing

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General Technical Support


The source of all things EXUP




Float Height Setting Trick for 38mm "Mik's"
One of the problems with setting the float height on the 38mm downdraft Mikuni's that come on Ducati's, yzf 750's, tdm 850's and fzr1000's, is that the darn white plastic "float cage" keeps popping out of the carb body unless you hold it in.

When you hold it in with your fingers, you always flex the cage frame and distort the reading that you are setting the float height at..... Aaarrggghhh!!  :-)

After spending 45 minutes setting some yzf750 carbs in the sweltering Mid Ohio heat of summer, I decided to make a float cage holder and sell 'em! I'd make a million  $$!!

When I got back to work, I set up and made a pile of cute little flat braces.

As I was sitting there, admiring my cleverness...... one of my parts guys wandered by and asked what was I making? I showed him that you could just take my clever little piece of aluminum and hold those float cages right tightly up into their seated position - so you could get consistent float height readings.

He says.....
It looks like you could just put the float bowl on with the front holes on the bowl lined up with the rear holes on the carb body and slap some screws in and it would do the same thing...........
I bought him lunch with the million $$ I didn't make....



Hello.  Here’s the pics you asked for!  Thanks for the help, the bike runs BEAUTIFULLY now, lots more power!  The front end now comes up on the throttle – whereas it didn’t before!  There’s another pic in there too where I used a bar code to measure the bowls.  I found this a lot easier than using a ruler.  I measured the bar next to the number “8” on my barcode to be the recommended height on my bike – 14mm.

-Mike Beary

Thanks Mike, for the pics!
Marc Salvisberg



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

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EFI and Carb Tuning - Most all FI and carb tuning

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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

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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!

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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!
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707 938 2444

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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.