Choosing Muffler for cb450

[schaubster]

I am working on my exhaust system of my 73 CB450 right now. I acquired a set of single wall headers from ebay and have modified them from a 2-1 into a 2-2 system. I am thinking of keeping the mufflers underneath the bike.

I have 2 idea's for the muffler:
1. Buy some shorty reverse cones from DCC
2. Buy some used ducati 1098 mufflers and chop them shorter

What are your thoughts? Will the ducati exhaust provide enought back pressure?

 

[Rich Ard]

Not after you go over a speed bump!

How did you bring the pipes together in to a single?

 

[Rich Ard]

Just occured to me that you didn't. Sorry, apparently I can't read.

Anyhoo, "backpressure" doesn't really come into the design process as what you would need to be concerned with is header length and diameter. If you search the forum there are a couple of really interesting resources for exhaust design.

I suspect that you will never see performance with your setup equal to the stock double-walled pipes - at this point, if you're sticking with what you've built, my suggestion is to put on what you like and then attempt jetting to match.

 

[schaubster]

Well I would like to keep the pipes because they look good but it's never a good day when you decrease performance. I don't know if it makes a difference but I am also putting some mikuni carbs in there.