Pipe size

Does it really matter the pipe size?
I mean, I get that the outlet is 7/8" and all, but does it matter if it is expanded to say 1", or 1 1/2" ?

In general, this would make it 199% easier to make exhaust parts, and find fittings. Not only that, but it sure would sound nicer (deeper), and I am thinking that as long as I am sending (tuning) the proper waves back up the pipe, it should be ok right?

oldtimer54 said:

Depends on if your engine type. Is it a 2 stroke or a 4 stroke? I don't think you would have any problems doing that with a 4 stroke but I don't think it would work with a 2 stroke as you need some back pressure?

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That's what I mentioned. I have a 2 stroke.
Back pressure is only going to help during specific RPM's that the exhaust is tuned for. Obviously some is needed, but as long as you are sending waves back up the pipe in tune, it really should not matter the size of the pipe so long as the tune is correct for the RPM's you are aiming for. Ultimately this just comes down to the header length for timing adjustment. You can send waves back with any dimension. However, it's obvious that with a larger pipe, the waves will be larger, weaker, and take longer to travel.

This isn't a sound thing I'm after, even though the resonance will be much deeper, and much more pleasing to the ear, I'm more concerned about the ability to tune properly.