Marks or UFO?

[KDIMD]

I picked up these headers and cans from another forum member. He wasnt sure what they were, maybe UFO or Marks. Can anyone identify them as there are no markings on the pipes. Are these considered 4-2-1 or 4-1?

I painted some parts black as they had a little corrosion. And probably not assembled right.

Also, I assume I need to remove the center stand. Do I need to remove the tabs that the stand attaches to? I will use gasket sealer. Anything else to think of to make it easier?

I am running 147.5 jets. Are these ok for these pipes? I will be installing Morleys jet kit later.

 

[Buster Hymen]

It's a 4-2-1 but I'm not sure of the make. Jetting you won't really know until it is on your bike and running.

 

[Traumahawk]

I started out running 147'5s on mine with a Kerker 4-1 with a competition muffler. You will need to shim the needles, but it will run great.

 

[davesax36]

I started out running 147'5s on mine with a Kerker 4-1 with a competition muffler. You will need to shim the needles, but it will run great.

Are you still running a stock box?

 

[one2dmax]

I've seen many kinds but I'll be damned if I have seen those. Doesn't look like Marks head pipe connections to me so not likely to be his. I don't think HMF ever made a 4-2-1. Marks 4-1 system is completely different. Doesn't look like Hindle or Voodoo either. You have any mufflers we can look at?

 

[Traumahawk]

Are you still running a stock box?

Yes. I do have the Y removed.

 

[davesax36]

Ah.

 

[Traumahawk]

I was on a dyno when I removed the Y.....I picked up 3 hp.

 

[Mr. Max]

Looks UFO to me!

 

[KDIMD]

Picture is from PO. These are the 3 exhausts that came with it. One on left has a baffle, the center is marked UFO and right is a slash cut. The center and slash have no baffles or other markings.

Are most full systems pretty much comparable with each other?

 

[davesax36]

One looks like a Marks can...

 

[ImCannibal]

Kinda looks like somebody pieced together a system out of several different kits...

 

[one2dmax]

Kerker, UFO, and Voodoo/UFO can on the right. Probably a UFO system from what we can see.

 

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Definitely UFO pipes with an assortment of mufflers.

147.5 should be OK with the stock airbox. As noted, plan on shimming the needles.

 

[Mr. Max]

Why smaller mains and then shims to needles? Does it go lean at midrange without shims or..?

 

[davesax36]

Yes. Lean midrange with stock airbox and smaller mains.

 

[Mr. Max]

Where do you get these shims? 4mm hole, and 1mm thick, yes? What about diameter, what fits in there? I just might try to shim mine, too.

 

[Traumahawk]

These are shims that I ordered. Some people will get washers and will grind them down to the specified thickness. I ordered these....as they are precision, and you will need 2 sets.

http://www.exhaustgas.com/ProductDe...epartmentID=10&CategoryID=61&RepID=&BasketID=

 

[Mr. Max]

Thanks, I ordered those too.. A little pricey but no headaches because of uneven grinding etc.

 

[[email protected]]

So, which muffler are you going to run?
I'd be interested in buying the one in the middle.