Superflare Billet Velocity Stacks EVO Shift STAR kits
(Factory Pro's own copyrighted design)





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Unleash your bike's power and control

Factory Pro
Race bike ECU Reflash
  • Fuel and ign changes are custom items
  • adjust IAP Fuel Maps for better race part throttle
  • adjust TPS Fuel Maps for better race power
  • adjust Ignition Maps for more race torque
  • Secondary Throttle Plate (STP) Opening Maps
  • Adjust RPM Limiters
  • Disable Top Speed Limiter
  • Disable Stock O2 Sensor for racing
  • Disable Exhaust Valve for racing
  • Features available for Kawasaki ZX10R 2008-2010
    • IAP Fuel Maps
    • TPS Fuel Maps
    • Ignition Timing Maps
    • Secondary Throttle Plate (STP) Opening Maps
    • QuickShifter (requires Race Tools)
    • Launch Control (requires Race Tools)
    • Pit Lane Limiter (requires Race Tools)
    • Race Shift Pattern (requires Race Tools)
    • Injector Balance Maps
    • Fuel Trim Maps
    • Adjust RPM Limiters
    • Adjust Fan Temperature
    • Disable Top Speed Limiter
    • Disable Stock O2 Sensor
    • Disable Fuel Cut
    • Disable Exhaust Valve
    • ECU Mode
    • Woolich Racing AutoTune
    • Real Time Engine Data

Remove high rpm power restrictions
Change rev limiter.
Remove / modify speed limiters
Modify ignition timing

The 08-10 can really use ign timing changes

We have all learned that each bike, even with the same aftermarket parts, requires different mapping than it's identical twin bike. That's why when someone  "downloads the perfect map" off of some website for a pc or Bazzaz, that it only has a 10% chance of being perfect "on YOUR bike".
With 35+ years of tuning experience, Factory Pro knows that the key to silky smooth and strong  running is individualized, perfect tuning on each bike - That's why we do tuning for people all over. Except CA sttreetbikes.

$275 for non-ca unrestrict reflash (which is commonly done)


(415) 472-4962

Pro Power ECU reflash
race and trackday

semi custom - mail in ecu

Subtle modification of STP acc and STP decel tables
 subtle ignition table sculpting
unify fuel and but not unify the ignition tables
raise rev limit a bit and disable top speed limiter
elim O2 sensor light for race only use
elim exhaust valve servo CE light
disable fuel cut

not CA street legal

(April 2015: reflash ecu guy says his bike is was better. More mid-range. better on off throttle.
He says thanks ! 
 ref: Paul F.)

Regular price $425

Special $375

(415) 491-5920 mail in

Reflash and TUNE to Best Power - custom tune on ec997 dyno
(not power losing autotune to an AFR)

Subtle modification of STP acc and STP decel tables
 subtle ignition table mods
unify fuel and ignition tables
raise rev limit a bit
elim O2 sensor light for race use

Custom Tune FUEL maps to your race bike
 with your Power Commander + race only reflash.

not CA street legal


(415) 472-4962

Simple delimit:
100% Secondaries, raise rev limit, unify fuel and ign maps, blanket ign mod


(415) 491-5920 mail in

not CA street legal

Hybrid Ceramic Wheel Bearing kit

intro special

reg $340.20

5 bearing kit
front and rear wheel + sprocket carrier
pn: BE-HYCER-K73-08-10
1. Choose your shipping method


Hybrid Ceramic Wheel  Bearings

5 bearing set

2 front wheel bearings
2 rear wheel bearings
1 sprocket carrier bearing

Tough steel races and almost  friction free ceramic balls.

Bearings are pregreased and ready to use.
Bearings have rubber seals that are easy to remove if desired.


Billet Factory Pro design Velocity Stacks


Billet Superflare 08-10 ZX10r Velocity Stacks

email here to be notified when done

Our testing was done with:
stock camshafts, stock pistons and stock valves and cylinder head and an aftermarket exhaust system.
and using the stock air filter and, later, the Factory Pro BMC RACE filter.

Factory Pro Dyno Centers 
F-USA HP leaders!
Tuning to Best Power
The way we were, the way we are, the way we will be.
Because we're right.

email for wait list - here
800 869-0497 or 415 491-5920
9-6 pac time M-F

all stock stacks,
with stock exhaust

2 Factory Pro Billet stacks and
 2 short stock stacks
still the stock exhaust

Dec 10, 08
Initial testing shows a healthy 4-6 hp boost, starting at about 7500 rpm and peaking at indicated 12,000 rpm.
There's a 5-6 boost at 8000, a 2-3 loss at 9000 and 3-5 boost above that.

When looking at the torque curves, you can see that the stock stacks produce a "bumpy" torque curve and the Factory Pro prototype stack stacks produce a wider, smoother, better averaging torque band.

It looks like neither the zx10 or the zx6r  like oval stacks. I might go out on a limb, here, but, I don't think that anything with a tuned intake tract likes an oval intake inlet.

All the HP figures are TRUE HP, not "dynojet HP). To get rough dynojet HP, multiply TRUE HP x 1.1 to 1.15 (depending on which dynojet dyno you want to try to mimic)

BLUE = all stock stacks, with stock exhaust

RED = 4 short stock stacks

4 KAWASAKI "SHORT" stacks, without FI retuning, seem to hurt the lowend (at least at full throttle and without FI retuning) and doesn't much help the topend.
Even though the EC997 dyno results show a slight gain at high rpm, the "gain" is well within a 1.2 HP tolerance.

All the HP figures are TRUE HP, not "dynojet HP). To get rough dynojet HP, multiply TRUE HP x 1.1 to 1.15 (depending on which dynojet dyno you want to try to mimic)

Notes from testing December 2008

1. Cooling system capacity good.
2. Bike tends to overcool, could use 185f thermostat to stabilize tuning settings and power output in cool weather.

Factory Pro's EVO Shift STAR kit - Fix the zx10 shift mechanism

SHFT-STAR-K73    $149.95)

kit contains: EVO Shift STAR
(the bike already has a good arm and ok spring)

1. Choose your shipping method


Evo Shift STAR kit

Add the Stage 2 Star to the primary Stage 1 kit.

Don't sell your "10". Just FIX the clunky shifting.

If you have a zx10 and have notchy, clunky shifting - Install Factory Pro's copyrighted design Shift STAR kit and breathe a sigh of relief - Finally, smooth and Quick shifting.

Drags: Especially good with quickshifters and undercut gears. Complete gearshifts 5 to 10ms quicker - lower ET.
Roadrace: Quicker shifts with less effort - better upshifting AND downshifting.

Takes about 1.5-2.0 hours for initial STAR install.

Using a "quickshifter"
Because the shift is completed quicker, please decrease "shift kill time" by  5-10 ms.

This kit will speed up the shift mechanism. It doesn't make any difference if you use "manual shifting", an air or electric  shifter, have undercut gear dogs or not undercut gear dogs - It's the shift drum gear selector mechanism that we are rotating quicker and more accurately. 

Factory Pro
"Fixing what the factory forgot"

800 869-0497
415 491-5920



I just want to thank you for developing the shift star for my ZX10R.

Like your ad says: "Don't sell it, fix it!"
I am very impressed with the results, the shifter now feels like the rest of the controls.
It no longer feels like a toy that you are hurting when you are shifting.
July 7, 2006
Squire Tomasie


(sample pic only)



fits 08-10 zx10r
replaces: 13236-0141 detent arm and  92145-0732 spring

Clutch cover gasket not included.

1. Choose your shipping method



Pro Shift Kit

Stage 1 - the primary kit

Ceramic Microbearing Detent Arm and F-Pro Shift Spring

Stage 1: 
Our most cost effective shift improvement kit

Installation available in San Rafael, CA

Wheelsmith / Factory
415 472-4962

Additional oem Kawasaki required parts (not supplied in kit)
1     GASKET, Clutch cover
side orders.....
Matched Injector Sets

Matched Injector Sets

$240 for 2 sets of 4 at  2%

$360 for 2 sets of 4 at 1%
(1% are limited availability)
Matched injector Sets

Serious engine tuners agree that power is maximized with proper tuning - and optimal tuning isn't possible with mismatched injectors.
A weak injector can take out a pro dragbike's cylinder in a single run.

Factory Pro inspects, pulse cleans, static AND pulse flows mass quantities of injectors and carefully selects like flowing (both static and pulse) units and packages them up as sets.

Prices are for EXCHANGE of useable injectors.

At times, we may have enough inventory in stock to sell outright.

Call 415 491-5920  Injector Dept


BMC RACE filter

1.0 to 2.0 TRUE, Loaded, real HP
(no misleading dealership level dynos used in testing!)

800 869-0497

On the graph (click on it), you can even see that the fuel delivery was a bit leaner with the BMC - as evidenced by the lower red CO% line -
CO% is a much better way to derive estimated A/F Ratios as compared to wideband O2 sensors.

FIB-KAW-37619 S
BMC Street filter


Street filter = Same as stock HP
(no misleading dealership level dynos used in testing, either!)

800 869-0497



Just wanted to say "Thanks", again. I'm really impressed by your calling me to give me the info on the advance rotor. That, in my book, is "Going the extra mile."  That's what makes a company succeed.

Steve ...in Kennesaw

Feb. 19, 2003

HI Marc,

Received the items on the 03Nov, fitted items on the 06Nov with Meng Tong. Enclosed is a picture for your information, or maybe you want post it out on the net. Also I used Loctite 243-Threadlocker and Loctite 7471 Activator for your information on the nut of the roller bearing and onto the allen screw holding the star.

I hope you find the pictures - use fully.

Yours Humbly,

David Isaac 

-----Original Message-----
From: marc@factorypro.com [mailto: marc@factorypro.com]
Sent: Tuesday, October 31, 2006 5:22 AM
To: david.isaac@dlh.de
Subject: Re: Shift Star Kit for Kawasaki ZX10-R (04)

Hi Marc,

Received the items on the 03Nov, fitted items on the 06Nov with Meng Tong at Looi's Motor in Singapore.
Enclosed is a picture for your information, or maybe you want post it out on the net. Also I used Loctite 243-Threadlocker and Loctite 7471 Activator for your information on the nut of the roller bearing and onto the allen screw holding the star.

I hope you fine the pictures use full.

Yours Humbly,

David Isaac

-----Original Message-----
From: marc@factorypro.com [mailto: marc@factorypro.com]
Sent: Tuesday, October 31, 2006 5:22 AM
To: david.isaac@dlh.de
Subject: Re: Shift Star Kit for Kawasaki ZX10-R (04)


Hello David -
Received details - Shipping USPS Global Express tomorrow.
Should be about a week -
Snow, yet?

david.isaac@dlh.de wrote:


Dear Mr. Leigh,

Good morning to you, I am very interested to purchase your SHFT-EVO-K95-KT which consist of one Star + Spring and Detent Arm. I have had purchase your Velocity Stacks previously.

The Shift Star Kit is for my ZX10-R (04).

Please confirm total cost and approximate date I should receive items. Special discount would be very much appreciated. For your information Loois Motor, Meng Tong will fit these items for me as we are good friends. Upon confirmation, I will e-mail you my payment details.


Do I need to Loctite the screw for the Star and the Detent Arm?


 Yours Sincerely,

David Isaac


Remove the clutch cover - for 06/07, not required to drain oil.
Remove clutch assembly (requires impact wrench and large, deep socket)


Replace the arm and new STAR.

Replace the shift shaft and clutch assembly -

ALWAYS use the Kawasaki Service Manual!!!


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Contact Factory Pro
M-F, 9am - 5pm, Pacific time, -7 or -8 GMT

800 869-0497
 USA and Canada

415 491-5920

fax 415 492-8803

Factory Pro
179 Paul Drive
San Rafael, CA 94903

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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