Superflare Billet Velocity Stacks
2 piece, quick change design
F-Pro Shift Spring
Virtually eliminate missed shifts and false neutrals 
Shift "better than new".

Factory Pro Billet Velocity Stacks



This photo shows the airbox top "off". Normally, the top would be "on".
Stacks can be run with aftermarket AFT, GNC and roadrace airboxes in various lengths, 15mm to 80mm

VEL-K66S64-6060     $149.95
(fits ex650 07-16)
(requires enlargement of the 2 airbox stack holes to install)

1. Choose your shipping method


Billet Superflare EX650 Velocity Stacks

Boost the EX's upper mid and topend by 2-3 hp and lowend by 1-2 hp.
(as shown in the below chart)
improve low speed running and make throttle response crisper and more responsive
(not shown on chart)
give your EX a crisper, more solid intake sound at high rpm.

Our testing was done with:
stock engine, stock exhaust and stock air filter - and NO fuel injection tuning at all.
See dyno chart below.

Installs into the stock airbox  (with modified stack entry hole)-
The above picture shows the airbox lid removed, to show installation of stack.

The EX650 stack Installation requires a bit of extra work.
Grinding - Enlarging 
the original plastic airbox holes need to be 2mm larger in diameter.
Relatively easily done with a Dremel hand grinder or large rounded side of a file.

GNC / dirt track airboxes: enlarge through holes by 2mm.  The adapter rubbers clamp to the stock throttle bodies and to fit like a grommet in the airbox plate hole in the same fashion as  the stock stacks.

Dirt track stacks can be ordered in:
 15, 21, 25, 30, 35, 40, 45, 50, 55, 60, 70 and 80mm lengths.

EX650 Superflare stack EC997 dyno testing

RED line is  stock exhaust stock air filter not retuned FI Factory Pro Superflare Billet Velocity Stacks
Blue line is stock exhaust stock air filter not retuned FI STOCK Velocity Stacks

"Better than new shifting" - virtually eliminate missed shifts and damage caused by missed shifts.

F-Pro Shift Spring.

ex650 17

pn: z95-k66-0601

(replaces oem 92145-0304)
1. Choose your shipping method



(sample pic - not of 650 arm)
low friction Hybrid Ceramic Detent Arm



(replaces oem 13236-0170)

1. Choose your shipping method


F-Pro Shift Spring

Replace soft stock shift spring for "better than new" shifting.

A MUST DO for dirt track.

Improves manual and quickshifter shifting.

Brightens up shifting and virtually eliminates missed shifts and damage caused by missed shifts.

The 650 has a pretty good  detent arm  but you can make some  additional improvement with a
Hybrid Ceramic Detent Arm.

Installs under the clutch basket. Take 1-2 hours and a 1/2" impact wrench. Clutch cover gasket not supplied.

Use arm and spring for best results - but if you are on a budget and only buying one part, buy the spring.

(415) 883-5620
   /   (800) 869-0497

New and improved br> 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 - 6pm, Pacific time, -7 or -8 GMT

800 869-0497
 USA and Canada

415 883-5620

fax 415 492-8803

parts information

EC997 dynamometer information

Product Support /Tech SECTION
click here

Mailing / Shipping address:

Factory Pro
179 Paul Drive
San Rafael, CA 94903

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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