Good morning all,

I am planning on building an exhaust system for my '93 FXR. I bet a lot of you know the lack of exhaust options for these models. Decent pipes are fucking expensive and I have a family and mortgage to consider. Plus, I like to fabricate .

It still has the stocko pipes with crossover. I don't want to touch them in any way. They go on the shed wall for later.

I am handy with a mig and the father-in-law is a boily too. Yippee for me.

I am looking at building a pipe from other bits and pieces, similar to a lake pipe, using a 2-1 header of some description. The plan is a 3-bolt flange welded at the end of the header, staino glass-packed muffler of approx 9" in length, and a 3.5" staino dump tip (turndown) tig'ed onto the muffler. Polished from the 3 bolt flange, back. I am planning on the pipe finishing just before the pillion peg.

Now, I am a car guy also and have various bits and pieces still floating around in the shed. One of them being a staino drag racing muffler for a V8. About 9" long, 4" in diameter with 3" inlet/outlet. The thing is pretty small. It has a perforated steel baffle with glass wrap. I can look right though it. This is the sort of muffler I would like to use for the fabrication as I like the compact size and it will polish up nicely. (the headers will be wrapped..have that in the shed too).

Muffler is nearly identical to this one.

http://www.summitracing.com/parts/wlk-24250/overview/

My question is whether this sort of muffler will be any good on a bike. I am not building a pipe for noise, I am building a pipe for power and grumble. Drag pipes are awesome for about 10 minutes IMHO. I expect this muffler will take out the crackly-ness of the exhaust, I am just curious to know whether there will be sufficient back-pressure. I'm also guessing that it will still be pretty loud too...

2nd question, I have heard that I can pretty much us any 2-1 header off a softie or early dyna. Thoughts?

Thanks in advance guys,

Cam

 

 

 

 

 

 

 

 

 if it's a straight thru type that's good  about 2" inside dia  , being a car muffler it might be a bit heavy for a bike , so you will have to be supported   good off the g/box somewhere so it can go up & down with the rubber mounted engine ,   the thicker the wall thickness the deeper the sound / note 

Thanks heaps dr56. Yeah, its a heavy little thing for what it is. It's fairly thick-walled too so that is a good thing. I was going to use a bit of bar-stock and hang it off the tranny.

Cheers mate.

 use more than 1 tranny mount  bolt holes,  i normaly  do a L shaped bracket in the lower rear corner of the case   3 bolt holes,  FXR's  respond good too comp ratio's & cams , did the 1st street FXR 80 c.i. bike to qualify for nat drag  meetings in the early to  mid  90's ,  11.7 on stock  cv carb's

 Awesome daddy, thanks very much for the advice.