2 into 1 exhaust

Does anybody know wer i can get 2into1 exhaust made for my 73 750 commando

Lurgy said:

Does anybody know wer i can get 2into1 exhaust made for my 73 750 commando

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What style are you looking for? Steve Maney still has some left, his are still the best out there.

www.stevemaney.com/products.html


Nigel at NRP Exhausts also makes similar but in stainless steel (or titanium) but needs the bike to custom build the pipe.

Lurgy said:

Does anybody know wer i can get 2into1 exhaust made for my 73 750 commando

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In New Zealand too: https://www.vikingexhaust.com/getPart.asp-id=41.htm

Fast Eddie said:

What style are you looking for? Steve Maney still has some left, his are still the best out there.

www.stevemaney.com/products.html


Nigel at NRP Exhausts also makes similar but in stainless steel (or titanium) but needs the bike to custom build the pipe.

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would prefer underslung one due to me other half melting her tights

Will make you whatever you want. Custom fitted to the bike. As will NRP, who made the separate pipe stainless exhaust on my Rickman.

Though I see little benefit in fitting any exhaust to a road bike that will require the removal of the centre stand and need at least partial removal to do an oil change, and not use peashooters!

But, I think the Commando separate peashooter is system is the most beautiful exhaust around, so I may be biased.

FWIW, I looked into the Viking system some years ago and decided it wasn't practical for me due to the required removal of the center stand and the reduced ground clearance. But if these items weren't a consideration - and they may not be for other folks - the Viking looked like a nice piece of kit.

Lurgy, why do you want one ?

I don't have this bike anymore, but I still have this 2-1 pipe set. No muffler, just the pipes. Its a system made by Armour in the UK. It worked great, but I prefer the stock setup so I'm not sure I'll put them on another bike. PM me if you're interested.

Hey Trevor, interesting bike….lots to look at . Did you make or buy the central oil tank ? Where’s the battery live ?

I have to admit none of it was my work. The oil tank was made, and a very small battery lived under the seat hump. It was a lovely bike and lots of fun.

I will try to make a two into one pipe for a project. As i look at various siamese exhaust pipes such as these BSA ones. It looks as if the cross over pipe is twice as long as the other pipe at the connection point. Am I seeing this correctly? Any other advice?

Trevor Hallam said:

I have to admit none of it was my work. The oil tank was made, and a very small battery lived under the seat hump. It was a lovely bike and lots of fun.

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Hi Trevor, thanks. The more I look the more I like…
Yeah, definitely is and bet it was

franko said:

I will try to make a two into one pipe for a project. As i look at various siamese exhaust pipes such as these BSA ones.View attachment 124092 It looks as if the cross over pipe is twice as long as the other pipe at the connection point. Am I seeing this correctly? Any other advice?

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For a 360 degree twin, both primary pipes need to be equal length

If you live somewhere there is aircraft maintenance happening, there might be someone who makes aircraft exhausts out of nickel alloy tubing (Inconel). A 2 into 1 exhaust is easy to make, but there are a couple of things to note if you want performance. - There must be no restriction at the outlet to the connector, so the diameter of the tailpipe must be big enough to cope with the cross-sectional areas of the two header pipes. The tail pipe should be the same length as one of the header pipes. I am a lazy person, the header pipes on my bike are the same length as is used on a Z900 Kawasaki - they use a similar rev-range. Normally, I would calculate the length to suit the wavelength near the top of the rev-range. If you think about it - performance exhausts are about resonance - the tail-pipe resonates at twice the frequency of one of the header pipes. If the lengths are right the tail-pipe reinforces the pulses in the header pipes. Sound harmonies act in exact multiples, and the frequencies probably produce the strongest effect at only one point in the usable rev-range.