78 kz650 exhaust options?

  • katit
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78 kz650 exhaust options?

08 Dec 2020 13:39
#839590
I have pretty rusted exhaust on bike I got (see pictures). It's 4->1, can you identify what it is?

Questions.. Is it salvageable or it is junk?
Other parts bike I got has those chrome runners but no mufflers. Little rust. Any use for those?

What is the best course of action now? Make it work good and make it look good. Pointers?

78 KZ650B2A - resto in progress
www.kzrider.com/forum/11-projects/615161...s-1978-kz650-project
Other bikes: 1978 BMW R100/7, 1978 Moto Guzzi T3, 2016 DRZ400s

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  • Mikaw
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Re: 78 kz650 exhaust options?

08 Dec 2020 16:24
#839611
I don't think the 4 to 1 is junk. First I'd remove it and inspect it closely and check for thin areas. If its solid, you can get it ceramic coated. Personally id lean toward restoring it as most of the older exhaust are better made.
1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
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  • Nessism
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Re: 78 kz650 exhaust options?

08 Dec 2020 16:38
#839616
That header looks like a MAC. It's pretty much the lowest form of a header but serviceable enough. The stock pipes looks to have had their mufflers sazsall'ed off. Other than the removeable pieces I'd send them to the trash can.
Ed
Carb O-ring Kits : www.kzrider.com/forum/3-carburetor/61807...-o-ring-kits?start=0

www.kzrider.com/forum/faq-wiki/618026-new-owner-things-to-know

1981 KZ750E2
www.kzrider.com/forum/11-projects/604901...z750e-project-thread

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  • gd4now
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Re: 78 kz650 exhaust options?

09 Dec 2020 10:08
#839669
From the pics you posted it would appear to me that either system could be usable. It is dependent upon what you want for your machine. Take the 4 into 1 off and take it to bare metal and see what you have. Any pin holes or thin locations? If not paint it with high temp header paint or get it coated. As to the stock set there are mufflers that could be added to it.
1977 KZ650 B1
Pods and Denco header

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Re: 78 kz650 exhaust options?

09 Dec 2020 10:28
#839671
gd4now wrote: From the pics you posted it would appear to me that either system could be usable. It is dependent upon what you want for your machine. Take the 4 into 1 off and take it to bare metal and see what you have. Any pin holes or thin locations? If not paint it with high temp header paint or get it coated. As to the stock set there are mufflers that could be added to it.

Will do. For the stock set, which mufflers can be used? Where to find? I checked all sites - NA everywhere
78 KZ650B2A - resto in progress
www.kzrider.com/forum/11-projects/615161...s-1978-kz650-project
Other bikes: 1978 BMW R100/7, 1978 Moto Guzzi T3, 2016 DRZ400s

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Re: 78 kz650 exhaust options?

09 Dec 2020 10:48 - 09 Dec 2020 11:02
#839674
Amazon has universal motorcycle mufflers. Some sort of adapter will have to be welded to the stock pipes in order to mount them.
Ed
Carb O-ring Kits : www.kzrider.com/forum/3-carburetor/61807...-o-ring-kits?start=0

www.kzrider.com/forum/faq-wiki/618026-new-owner-things-to-know

1981 KZ750E2
www.kzrider.com/forum/11-projects/604901...z750e-project-thread
Last edit: 09 Dec 2020 11:02 by Nessism.

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Re: 78 kz650 exhaust options?

09 Dec 2020 10:54
#839675
Nessism wrote: Amazon has universal motorcycle mufflers. Some sort of adapter will have to be welded to the stock pipes in order to mount the mufflers.
Nice, I see. Then I won't throw away those 2->1 headers for now
78 KZ650B2A - resto in progress
www.kzrider.com/forum/11-projects/615161...s-1978-kz650-project
Other bikes: 1978 BMW R100/7, 1978 Moto Guzzi T3, 2016 DRZ400s

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Re: 78 kz650 exhaust options?

09 Dec 2020 11:06
#839676
The photo below shows what your exhaust looked like before someone hacked off the muffler. It's one piece from new and the muffler is not removeable. Again, you would have to weld on some adapters. Personally, I'd focus on the header first.

Ed
Carb O-ring Kits : www.kzrider.com/forum/3-carburetor/61807...-o-ring-kits?start=0

www.kzrider.com/forum/faq-wiki/618026-new-owner-things-to-know

1981 KZ750E2
www.kzrider.com/forum/11-projects/604901...z750e-project-thread

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  • katit
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Re: 78 kz650 exhaust options?

09 Dec 2020 12:49
#839686
Nessism wrote: Personally, I'd focus on the header first.

What do you mean by that?
78 KZ650B2A - resto in progress
www.kzrider.com/forum/11-projects/615161...s-1978-kz650-project
Other bikes: 1978 BMW R100/7, 1978 Moto Guzzi T3, 2016 DRZ400s

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Re: 78 kz650 exhaust options?

09 Dec 2020 16:10
#839697
katit wrote:
Nessism wrote: Personally, I'd focus on the header first.

What do you mean by that?

I'd focus on trying to clean up the header and get it repainted, assuming it's not all bashed up on the bottom. Messing around with trying to get mufflers installed where the old ones were cut off would be last resort to me.
Ed
Carb O-ring Kits : www.kzrider.com/forum/3-carburetor/61807...-o-ring-kits?start=0

www.kzrider.com/forum/faq-wiki/618026-new-owner-things-to-know

1981 KZ750E2
www.kzrider.com/forum/11-projects/604901...z750e-project-thread

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