Author Topic: Viable Stock exhaust replacement?  (Read 943 times)

0 Members and 1 Guest are viewing this topic.

Offline Lavis500

  • Why don't you go ask a
  • Hot Shot
  • ***
  • Posts: 306
  • "Don't plan vast projects with half-vast ideas"
Viable Stock exhaust replacement?
« on: June 01, 2010, 06:57:11 PM »
I'm rebuilding a '73 CB500, and as you'd expect my exhaust is completely rotted out.  My baffles are rusted all the way through the bottom seams, and where the mufflers met the headers was essentially toast.  I, like the rest of you I'm sure, don't want/have the money to spend $800 on a new stock exhaust.  Though the mufflers are done for, the rest of my headers don't look bad.  I was wondering if anybody possibly had any experience with these?

http://www.jcwhitney.com/dunstall-style-megaphone-muffler/p2006467.jcwx#

I'd like to go for a stock look and not have to worry about rejetting etc. I know its obviously not the same, but does anyone know if it's close enough?
"Whatever it is, I swear I didn't do it!"

'73 CB500 - Sally

Offline KB02

  • Take it easy there, Sonny, I'm an
  • Old Timer
  • ******
  • Posts: 3,760
Re: Viable Stock exhaust replacement?
« Reply #1 on: June 02, 2010, 05:50:52 AM »
Can you "Make it work?" Yes, you can. You can make anything work with enough time, energy, tools and perseverance. The things you need to watch out for are (and I say this after working on only 750's) the shape of the pipes and any deformities. The 750 pipes have a few spots where they have been clearanced to make room for Brake linkage and what not. You may find some bends in your stock pipes where as those Dunstall tips are just straight.

Just thing to think about.
1978 CB750K Project
2000 Ducati ST2
...and a pedal bike

Join the AMA today!!

My project thread Part I: K8 Project "Parts Bike"
My project thread Part II: Finishing (yeah, right) touches on Project "Parts Bike"

Offline Lavis500

  • Why don't you go ask a
  • Hot Shot
  • ***
  • Posts: 306
  • "Don't plan vast projects with half-vast ideas"
Re: Viable Stock exhaust replacement?
« Reply #2 on: June 02, 2010, 06:46:56 AM »
Though you pose an excellent point that I had yet to think of, I was meant to direct my question specifically towards fuel/air mixture.  I apologize, as I was unclear in my question.
"Whatever it is, I swear I didn't do it!"

'73 CB500 - Sally

Rlint

  • Guest
Re: Viable Stock exhaust replacement?
« Reply #3 on: June 02, 2010, 08:24:08 AM »
I posted the same question about the same muffler like two weeks ago.  I got nothin'.

Offline Lavis500

  • Why don't you go ask a
  • Hot Shot
  • ***
  • Posts: 306
  • "Don't plan vast projects with half-vast ideas"
Re: Viable Stock exhaust replacement?
« Reply #4 on: June 02, 2010, 12:20:10 PM »
I guess all that we can do is try it!   Then we'll be the ones with knowledge in that rea and we can say to people "yay or nay." At least it'll be cheaper than NOS and should look relatively similar, right?
"Whatever it is, I swear I didn't do it!"

'73 CB500 - Sally

Offline KB02

  • Take it easy there, Sonny, I'm an
  • Old Timer
  • ******
  • Posts: 3,760
Re: Viable Stock exhaust replacement?
« Reply #5 on: June 03, 2010, 05:02:44 AM »
Though you pose an excellent point that I had yet to think of, I was meant to direct my question specifically towards fuel/air mixture.  I apologize, as I was unclear in my question.

If nothing changes but the pipes, you should be all set. BUT, every bike is different, and it would be worth doing some plug chops to be on the safe side.
1978 CB750K Project
2000 Ducati ST2
...and a pedal bike

Join the AMA today!!

My project thread Part I: K8 Project "Parts Bike"
My project thread Part II: Finishing (yeah, right) touches on Project "Parts Bike"