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Author Topic: Exhaust Advice/Direction  (Read 1683 times)

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Offline cbnewbie

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Exhaust Advice/Direction
« on: April 23, 2016, 01:21:19 PM »
Hello!

New to the forum and need some advice. I picked up a '72 CB500 Four from a family friend in good condition for fairly cheap. Bike hasn't been registered since '85 and I'm in the process of fixing her up. I'm in a bit of a dilemma.

I have the original 4 into 4 exhaust to which one pipe is pretty rusted through at the connection point of the pipe/tip. I have another that needs some TLC with a small rust hole in relatively the same spot (both right pipes). The two left pipes are in good condition. I'm considering the following options.

Sell the 4 into 4 to someone more passionate for original parts and buy a 4into1 or more preferably 4into2. The 4into2 I would want flare tips but I cant find anything that I can justify based on how much I purchased it for.

OR

Hang onto the original exhaust and try to find someone to fix them up. Anyone have experiences with this?

I attached some photos for reference. Looking for options for sub $500. Current pipes too far gone? Are they ripe for selling?

Thank you,
-Cam
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Offline SOHC4 Cafe Racer Fan

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Re: Exhaust Advice/Direction
« Reply #1 on: April 23, 2016, 11:25:43 PM »
That pipe is reached. Repops are available but are very pricey. You can buy great aftermarket options that offer great performance, too, in the $500 range. Specifically check out the Hindle 4-2-1 offered by Ripple Rock (take advantage of the exchange rates with Canada) or the MotoGP 4-1 if you can find one.
« Last Edit: April 23, 2016, 11:27:35 PM by CB750 Cafe Racer Fan »
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1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline calj737

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Re: Exhaust Advice/Direction
« Reply #2 on: April 24, 2016, 01:59:15 AM »
From the looks of that pipe, its not salvageable except for cutting off the end and welding a new tip on. The others may also be far worse inside than you realize.

Its pretty limited in options for 2-1 pairs (I think thats what you meant with 4:2) so you could fabricate some of your own if the header portions of your pipes are still in good solid condition. If you weld to the original chromed sections, the chrome will damaged and stripping them and re-coating or re-chroming will be necessitated.

Some other options is the Delkevic header tied to Cone Engineering mufflers (for a 4:1) or cheap Mac 4:1 with a Cone. you'll have some light fabrication to handle with hanging the new tailpipe from a 4:1 onto your bike, but you should have little problems handling it.
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"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline cbnewbie

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Re: Exhaust Advice/Direction
« Reply #3 on: April 24, 2016, 11:17:45 AM »
Much appreciated. Gives me some places I haven't looked into. Thanks.
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Offline dragon15130

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Re: Exhaust Advice/Direction
« Reply #4 on: April 24, 2016, 05:02:57 PM »
I got my Yoshimura Header from a salvage place here in Michigan called Slicks Salvage. I believe they have a ebay store also. You can try them. I'm just running the header with nothing else. Boss can here me from my house 4 miles away coming to work lol.
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Offline Retro Rocket

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Re: Exhaust Advice/Direction
« Reply #5 on: April 24, 2016, 05:08:46 PM »
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750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline Stev-o

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Re: Exhaust Advice/Direction
« Reply #6 on: April 24, 2016, 06:59:33 PM »
If your left stock pipes are in good shape [no holes] you can sell them here to offset the cost of the new exhaust, maybe $75-100 each, depending on condition.

And BTW - $525 for a new stainless exhaust is a great price [I recently bought one]

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'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline SOHC4 Cafe Racer Fan

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Re: Exhaust Advice/Direction
« Reply #7 on: April 25, 2016, 02:58:11 PM »
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1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline Retro Rocket

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Re: Exhaust Advice/Direction
« Reply #8 on: April 25, 2016, 03:46:59 PM »
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750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline Stev-o

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  • Posts: 34,399
  • Central Texas
Re: Exhaust Advice/Direction
« Reply #9 on: April 25, 2016, 03:47:56 PM »
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'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline cbnewbie

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Re: Exhaust Advice/Direction
« Reply #10 on: April 26, 2016, 06:22:40 PM »
I reached out to Moto GP and Ripple Rock. Just waiting for a response. Greatly appreciated guys. Thank you!
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Offline hsas.69

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Re: Exhaust Advice/Direction
« Reply #11 on: April 26, 2016, 06:42:38 PM »
I'm very happy with my delkevic using their megaphone.  Total price was around 350. https://youtu.be/0J0d2zoxxHo

Sent from my SM-T377R4 using Tapatalk
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