Yamaha FZ-1  06-15

Superflare MIDRANGE V Stacks

Billet Engine Covers

Jeff Stevens' tastefully modified FZ1


Superflare Billet Velocity Stacks

RA-VEL-Y77-8989   $629.95


1. Choose your shipping method


Billet Superflare Midrange Velocity Stacks

Alfonso Pantoja drove up from Guatemala to northern California to visit in 2007 June. His 06 FZ-1 had a K&N air filter, a Micron slipon and Graves velocity stacks. No pc3 or Teka 4 usb.

We tested our R1 Superflare stacks (same VEL-Y77-8989 kit as our 04-06 R1 stacks)  and can compare them with "other" plastic aftermarket stacks.

THESE are the stacks that boost MIDRANGE.

No FI mapping was done during testing.
That doesn't mean that you can run "any" map, it means that if you have a map that is actually pretty close to stock or stock or the map is pretty close to "optimal" for your bike, that they should likely work well.
If you install the stacks on a stock engined bike, and you develop flat spots, then, it's likely that your FI map isn't "optimal" for your bike (with or without the stacks) - and "proper" FI tuning would improve the bike - even without the stacks.

And you get that beautiful Factory Pro fit and finish.

Note: All HP figures are in TRUE HP scale.
For estimated dynojet hp,
TRUE HP x 1.15 = djhp

2008, April 16
Antonio Mornar
Just fine, nice weather and good riding temperature 18 C.  I am not tuning bike in any way but yoshi and to be honest it is running smooth like never before with the stacks. Stacks have made it more smooth in low revs. Anyway I am not easy to please but now I feel like after a good night!   Hope you know what I mean.
Soon I be joining ship and my small baby of 14000KW that make this ship go and bring fuel to US.
All the best and nice working with you.

(Antonio is an engineer on an ocean tanker with about a 10,444 hp engine)


Factory Pro dyno tune results with stacks

Hi -

Hey guy's got my bike back today and road it for the first time since I had Marc tune it at Factory Pro. Wow the bike is unreal how fast it is very responsive and pull's all the way threw the rev range big time. Now again my bike has all Ivan's mod's pc3, ignition mod, fce, flies, ais block off plates, and modified airbox with bmc filter, with full Yosh system. The blue baseline dyno chart is with Ivan's most recent map on the EC997 eddy current dyno, and the second run the red chart is the Factory Pro map with the only extra modification being the velocity stacks.  (chart not displayed)

Jeff Stevens

Factory Pro Billet Y77 stacks


"other" brand of plastic aftermarket stacks


>>>>>>>>  Here's another chart of the  >>>>>>

 Green w/ snorkel removed and FP stax
RED  w/snorkel installed and FP stax
BLUE  w/ snorkel and "OTHER STACKS"

No remapping from stock was done

So...... Removing the airbox snorkel should improve power a 1-3 True HP

All power measurements are measured under load on high quality EC997 dyne systems.
 Testing under unrealistically light loads on common dealership level dynos commonly results in different hp results. Sometimes more and sometimes less. Experienced dyno operators know this.

Note: All HP figures are in TRUE HP scale.
For estimated dynojet hp,
TRUE HP x 1.15 = djhp -





Factory Pro Engine Covers w/ Integrated Frame Sliders (Factory Pro patented)

And here are the pictures that a good salesperson
wouldn't show you....

R1 Factory Pro Billet Engine Cover set
w/ Integrated Sliders
(pat #6,637,737)

Factory Pro includes the patented, integrated, easily replaceable
 "frame slider" into the strongest part of the bike - the engine crankcases,
for the best protection.

RH side helps add additional protection to the vulnerable clutch throwout
 mechanism that tends to gets hit in a slow "low side" - even with upper frame
sliders installed.

Add more protection to your bike - safety first!

Beautiful, too!

Compare to other manufacturers' billet covers,
these units feature additional AMA, F-USA and WERA Pro proven,
patented "slider" protection .


(RH gasket not included, LH side has reusable o-ring)

$249.95 / set with sliders

International buyers will be billed $44 additional for shipping

Yes - they are more expensive than Graves, but these include lower
frame sliders for more protection.
Install notes, click here




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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The below links are people and companies that are consistently impressive with their continual uniqueness and dedication to providing traditionally valued, quality products and services.

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 -

Train to Win
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. 
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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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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 and P-51 flights!

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Just tell them that you saw this on the Factory Pro website!
Northern California's most unforgettable flying experience.  No experience required.  Open weekends! Call ahead in the winter.

Make your next tour Unforgettable,  Affordable and Exotic.
Superbike Tours Thailand - See you there.

Supwebike Tours Thailand
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.

Artisan Crafted Fine Cheeses – Since 1865   -    Specializing in Handmade Brie & Camembert

Marin French Cheese Co., also known as The Cheese Factory and Rouge et Noir is not just the oldest cheese manufacturer in the country, but a vacationers and day trippers destination as well as a unique part of American History. Located north of San Francisco, east of Napa County, west of Pt. Reyes and Olema and south of Sonoma County, Marin French has produced hand crafted Artisan soft ripened cheese since 1865. Rouge et Noir cheeses are similar to French and European varieties but reflect the characteristics of Northern California, producing it's own regional style.