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Go Back   FZ1OA Message Board > FZ1 & Fazer Owners Association > Exhausts, Carburetion & Performance > Gen 2 Exhausts, Fueling & Performance

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Old 02-27-2018, 04:29 AM   #1
AndyManCam
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Velocity Stacks on the cheap!?

Hi folks!

I know that velocity stacks has been flogged here over the years, but I wanted to float a different and very budget approach.

I think the majority agree that longer stacks move the peak torque/power down the rev range in exchange for a bit less at the top end.

The Graves and FP stacks are crazy expensive and extensions that lift the original parts are almost as insanely priced. Some guy over here in Germany wanted 130€ for a second hand set!

Anway, my idea is this. Would it not be possible to just put 2 OE stacks on top of one another? I know it wouldn't be pretty and that it also wouldn't quite be air tight at the overlap but the mount holes would line up and the diameters are all correct. I only ask because an extra set of stacks are easy to get and only about 20€ .

I'm not overly concerned about the lack of air tightness at the overlap as the variable length systems we're seeing more and more of also have at least a small gap between the fixed and the moving parts of the pipe.

So, what are your collective thoughts?

Cheap and easy way to shift peak grunt more into the midrange?
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Old 02-27-2018, 05:21 AM   #2
fermic37
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no, dont, stop.

Just creep ebay, r1 stacks also work on these bikes and more commonly come up for sale.
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Old 02-27-2018, 06:35 AM   #3
WileECoyote
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The only two that get lengthened are the outside banks. If you had the proper measurement on height, maybe it'd work.
Yes, variable length have a slight ridge or gap. I have no idea of what it would do to interrupt air flow in a system that was designed for smooth flow.
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Old 02-27-2018, 06:38 AM   #4
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+1 on creeping eBay.

I bought Graves stacks for under $9 bucks. I assume the salvage place thought they were stock stacks.

And I bought a set of Factory Pros for $59.

Fermic stop telling our secrets!
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2006 Retro or Granite Grey depending on my mood -Vcyclenut ECU/PCIII/Lairs airbox/K&N/flies removed/02 sensor removed/Factory Pro Stacks/Holeshot Header/Olson Performance slipon/16 tooth/Blind Spot fuel line/Penske 8987/Traxxion AK20's/DirtRoad Seat/Watsen front signals/Cooperdawg Screen/ASV Levers/Rizoma Bars/Galfer Discs/Carrozerria Wheels

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Old 02-27-2018, 06:39 AM   #5
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I mean if you really wanted you could buy another set, cut the mounting plate off one set and cut the top off another set with a band saw and glue the two together.

there are other brands out there that lengthen all four equally, i think graves is the only brand that staggers them.
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Old 02-27-2018, 07:21 AM   #6
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Originally Posted by 1mprnt View Post
+1 on creeping eBay.

Fermic stop telling our secrets!
No secret here bubba...................been creepin before there was the interwebs....................
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Old 02-27-2018, 07:24 AM   #7
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Quote:
Originally Posted by WileECoyote View Post
No secret here bubba...................been creepin before there was the interwebs....................
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2006 Retro or Granite Grey depending on my mood -Vcyclenut ECU/PCIII/Lairs airbox/K&N/flies removed/02 sensor removed/Factory Pro Stacks/Holeshot Header/Olson Performance slipon/16 tooth/Blind Spot fuel line/Penske 8987/Traxxion AK20's/DirtRoad Seat/Watsen front signals/Cooperdawg Screen/ASV Levers/Rizoma Bars/Galfer Discs/Carrozerria Wheels

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Old 02-27-2018, 02:02 PM   #8
longeze
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Maybe use something like this: https://www.parts-express.com/speake...lared--260-402

or choose from any of these or similar: https://www.parts-express.com/cat/sp...port-tubes/320

ALternatively, you could always get an abs or pvc/cpvc tube, warm a short length of it in boiling water and form the bell end over a small round object to put a flare on it.
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Old 03-01-2018, 02:12 PM   #9
LDH
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Here is a how to I put on the r1 forum, I also did the same on my fz1 with great results.
http://www.r1-forum.com/forums/10-ap...ty-stacks.html
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Old 03-01-2018, 06:48 PM   #10
roundhouse
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Quote:
Originally Posted by fermic37 View Post
no, dont, stop.

Just creep ebay, r1 stacks also work on these bikes and more commonly come up for sale.
What year stacks will fit?
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Old 03-02-2018, 04:13 AM   #11
fermic37
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I want to say 04-06. Some one correct me if im wrong.

You can go on graves website and compare part numbers.
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Old 03-20-2018, 01:37 PM   #12
larry1911
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Nothing substantive to add re: the stacks, but love the channel!


Larry
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Old 03-21-2018, 10:49 AM   #13
Big_Dave
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Talking

Quote:
Originally Posted by fermic37 View Post
I want to say 04-06. Some one correct me if im wrong.

You can go on graves website and compare part numbers.
Yep, 04 -06 works on our bikes. My factory pro came out of an 06.
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Old 04-08-2018, 09:15 AM   #14
AndyManCam
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Originally Posted by larry1911 View Post
Nothing substantive to add re: the stacks, but love the channel!


Larry
Cheers Larry!

I've still made no progress or movements in this area! Found some ready flared plumbing pipes in my local hardware store. Inner diameter sadly 1.5mm too small to still allow the butterflies to rotate. D'oh!
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