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hand made 4 into 1 exhaust......

  • Thread starter Thread starter fnkvn
  • Start date Start date
F

fnkvn

Guest
Has anyone here made one? I can get a collector from Speedway (Hot Rod Shop) for 25 bucks, and I was thinking about making my own pipe. It looks like I could use the two stock right side pipes as-is, feeding into the top two spots on the collector, and alter the left to to enter into the bottom two spots. The pipes will not be exactly equal length, but I am not sure how important that will be at the normal operating range that I experience? Sure, I like to twist the wick once in a while, but if I make the pipe, I can control the way it fits the bike better than if I buy aftermarket. Some of the aftermarket pipes hang really low, and do not look like they fit the bike very well.

Thoughts, anyone?
 
If you have the capability of bending your own pipe, go for it, but be warned, ...

PICTURES WILL BE EXPECTED.
well1.gif



I have thought of making a pipe, too, but would like to find a FLAT 4 into 1 or maybe do a 4 to 2 to 1 arrangement to keep the system from hanging so low.

.
 
Have you tried having a muffler shop bend the pipes from a collector back?
I did it myself using their shop equipment. (Good friend worked there.)
If I was to do it again or on a serious attempt, I would cut off the passenger
mount section and raise it higher.

DSC01650.jpg


The wife and I bottomed out on a 75-80 mph right hand sweeper a few month's ago:

DSC01658.jpg


Daniel
 
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Well, if the pipes are close to the bike's centerline, it isn't as critical to hang a little, because they won't drag (except maybe over extreme speedbumps).

As for bending, I usually just tig weld small pre-bent sections together, to make up the shapes I want. I don't want to get into a bike that is hard to re-tune after the pipe is made, so I'm looking for advice.
 
In the aftermarket industry we use "mandrel" benders to keep from getting the kinks like you see in the pipe above. Welding, like you are saying you will do, it is the next best way & LOTS of good race pipes are built that way. Go for it! Ray.
 
Ray's right - go for it. Most prototype pipes are hand made from bought in bends. I've built a lot over the years and it's not hard to get primary lengths within 1/4 inch of each other.
Try doing pipes for speedway TQ's or minisprints with transverse engines and the pipe has to pass through a narrow gap in the frame and be very close to equal length headers....lateral thinking can be useful.
 
I have looked at those speedway collectors. I would think you will be very disappointed in the quality and construction.
I use Dynatech headers slip-on collector when building headers. The collector only costs $57. Makes building a header almost fun

Years ago http://www.stahlheaders.com sold you buid it Suzuki mini sprint header kits for the oil head GSXR, that you cut to fit for very reasonable money. No longer listed on their web site, but you could call them and see if that option is still avaliable
 
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Ray, Thanks for that link. Really like their flat four collector. Could solve a ground clearance problem I've got
 
I'm keen to see what comes of this, although I don't want a 4 into 1 I want a 2 into 1... :)
 
Wow - what a huge help this thread is. Those are both awesome vendors, and that flat collector might be perfect. Thanks to all!
 
Just wanted to add that while routing the collector under the centerline of the bike is nice for cornering clearance, it does make routine maintenance a bit more fiddly.

I have a Yoshimura header and pipe on my Katana which does exactly that. I can't run a centerstand and the pipe and headers block access to the oil filter and the oil pan bolt. The header has to come off to service them. In addition, when I put the bike on a bike jack, I have to use 4X4 blocks to "shim" under the frame rails so the pipe doesn't get squished.

Just something else to think of.

On an episode of 2 Guys Garage, they fabbed up headers for a cafe project they built. They used pre cut mandrel bent pieces that came from a supplier I remember ( sorry I don't recall any name) and cut and tacked them together. They made it look easy but I doubt that it is.

If you can make friends with someone in a muffler shop you may be able to cobble something up on their bender which would make things a lot easier I'd think.

Good luck with it and please post pics if and when you get to it.

Cheers,
Spyug
 
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