36" Truck stacks, mitred

[gordonv]

For all those who have placed mitred truck stacks on their bikes. How did you find the right spot to cut the 9"x2" slot for the exhaust hanger, and have your 2 sides matching?

Doesn't matter if the mitre is vertical or horizontal, what matters is that they match from left/right.

I've been thinking this one. I can take my 2 stacks, lay them side-by-side, and match up the mitre cut on the one end. Tape them together (along the top), place a level on them, and mark the top.

This should give me a center line which I can now use to measure from, and mark where to cut the exhaust hanger from. But where to cut?

I figure I'll place the bike up on it's center stand, and taking a carpenter square, try to find where on the existing muffler, the hanger is at. Or a small square on the table, where the 2 pipes are touching, and this should mark the 90'. I expect the hanger might be around 90' from the top.

http://store.airflo.com/af420-436hs.html

[Hook#3287]

Gordon, my truck stacks were on my bike when I bought her so I didn't install them.

But their 24" and are mounted to the OEM system after the hanger.

Are yours different?

[Hook#3287]

Ah, I see you added the link.  Yeah, being 36" you'll have to do more modifing than mine.

[gordonv]

Yes, fixing the post.

This is what I think I'll be doing, now that I found it. Or a variation of it.

http://www.valkyrieforum.com/bbs/index.php/topic,35893.0.html

Tap the muffer, and screw in the coupler.

[fudgie]

Shouldn't matter if they line up as long as the notch is 90 deg from the end. There really is no 'up' on the pipe. Notch and slide them on. 

[Blackduck]

Where ever you pick for a cut line, use a piece of 2" angle iron laid on the pipe and you can mark perfect straight lines to cut to.
You can use the angle to run a reference line from the centre of the mitre.
Wrap a piece of paper around the pipe and make a mark anywhere it over laps.
Take it off, flatten the paper with the marks together and you will have 180 degree point where the crease is, repeat from the crease to the original marks and you have the 90 degree points .
Working off the centre line that should get you very close to where you wish to cut
Cheers Steve

[The emperor has no clothes]

Shouldn't matter if they line up as long as the notch is 90 deg from the end. There really is no 'up' on the pipe. Notch and slide them on. 

I think he is going to put on slash cut truck stacks. And wants the slashes to be equal on each side.

[gordonv]

Where ever you pick for a cut line, use a piece of 2" angle iron laid on the pipe and you can mark perfect straight lines to cut to.
You can use the angle to run a reference line from the centre of the mitre.

Referenced in the How-to in Shoptalk. (or I think that is where I saw it written).

Wrap a piece of paper around the pipe and make a mark anywhere it over laps.
Take it off, flatten the paper with the marks together and you will have 180 degree point where the crease is, repeat from the crease to the original marks and you have the 90 degree points .
Working off the centre line that should get you very close to where you wish to cut

I understand. Yes, this would allow me to find those 90'.

Shouldn't matter if they line up as long as the notch is 90 deg from the end. There really is no 'up' on the pipe. Notch and slide them on. 

I think he is going to put on slash cut truck stacks. And wants the slashes to be equal on each side.

Yes, I want the mitre vertical. Even if they are off a little, as long as the match from left/right, I would be happy.

I'm expecting to find the hanger at the 90' mark, so even running a line down from the tip of the mitred pipe should give me the center line for the side. Just mark the 1" up and 1" down for the cut out.

[Rio Wil]

Lay the stack on a flat surface with the long side up. Take a 1x4 board about 2 feet long, press the 1x4 flat side up to the slanted edges (scoot it up under the slanted edge of the stack). Wiggle the stack to maintain solid contact with the board and at the same time make sure the bottom edge of the board makes full contact with the flat surface. It will automatically seek the correct position. Place a square against the side of the tube, where it contacts the stack will be the 90 deg. point. Mark your cutout from there.

[gordonv]

So it sounds like the answer to my question is, the hanger cut out needs to be 90' from the top center line?

I've now gotten 2 methods to find/mark that point.

It is now sounding even easier than I was expecting it to be.

Now just a method to get those piggies changed over to copper pipes, and which size, needs to be worked out. I like the idea of a tap for the 1/2" adapter. Then drill out that ID to a larger size.

[fudgie]

Shouldn't matter if they line up as long as the notch is 90 deg from the end. There really is no 'up' on the pipe. Notch and slide them on. 

I think he is going to put on slash cut truck stacks. And wants the slashes to be equal on each side.

Guess I should have paid attention to the first sentence. 

[The emperor has no clothes]

Shouldn't matter if they line up as long as the notch is 90 deg from the end. There really is no 'up' on the pipe. Notch and slide them on. 

I think he is going to put on slash cut truck stacks. And wants the slashes to be equal on each side.

Guess I should have paid attention to the first sentence. 

Yeah, but evidently you had sheep on the mind. 

[fudgie]

 

Shouldn't matter if they line up as long as the notch is 90 deg from the end. There really is no 'up' on the pipe. Notch and slide them on. 

I think he is going to put on slash cut truck stacks. And wants the slashes to be equal on each side.

Guess I should have paid attention to the first sentence. 

Yeah, but evidently you had sheep on the mind.