Exhaust balancer pipe


Information and questions on GL1000 Goldwings (1975-1979)
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Saltspringer
Posts: 18
Joined: Fri Oct 19, 2018 3:33 pm
Location: Canada
Motorcycle: 1976 GL1000 in Antares Red

Exhaust balancer pipe

Post by Saltspringer » Sun Nov 18, 2018 8:57 pm



With the dark nights and cold here in British Columbia I am getting a reasonable amount of shop time on my recently purchased 1976 GL1000. After cleaning up some dubious wiring fixes, straightening the rear tail light assembly, sand blasting and painting the seat pan before ordering a new seat cover, and rebuilding the front brake calipers, I started working on the bodywork. The clear coat finish on the "tank" had crazed so I decided to sandblast it back to bare metal, before painting. Although the bodywork was in reasonable condition I have the time to repaint, also remove some subtle dents and rust spots in the center section of "tank" where, I suspect, someone had slammed it shut with their palm after refueling. The wings on either side of the the radiator were stone chipped and rusty in places so the center section and wings were all sandblasted and acid etch primed, before regular primer and color. Tomorrow the first of the clear coat goes on, decals on Friday and the final coats of clear next weekend.

After a lot of thought regarding the exhaust I took the 1979(?) exhaust that came loose with the bike to my local sandblasting shop and blasted off all the pitted chrome and corrosion. The pipes have rotted through just at the start of the muffler section, so I took a grinder and cut the headers off the mufflers. I then measured the mufflers up and found I needed to cut about 1 1/2" off the muffler to reposition the main stand tang into the correct spot on the left hand side muffler. Conveniently this also allowed me to cut out the rotted section back to solid muffler again. A 5" piece 1 3/8" steel pipe split length ways with my angle grinder allowed me to squish the circumference just enough to slide inside the muffler baffle. I took some thin galvanised sheet and wrapper the expose steel pipe in three turns to slightly build the OD up to match the ID of the header pipe. I then reattached both to the bike and measured the changes needed to the muffler hanger, which was now in the incorrect spot. I carefully ground the hanger off the muffler and reattached it to the bike. With it now lying loose on the muffler I was able to adjust the pipe to get the correct looking angles and by supporting the end of the muffler with a scissor jack, used my MIG welder to spot some tacks onto the loose components. Once carefully removed from the bike I could MIG weld the small gap between the headers and the mufflers and properly attach the muffler hanger bracket. It looks pretty smart; its still in bare metal and after I fire the bike up and check everything out I will take the exhaust off for a final sand blast, before painting in heatproof black paint.

Sometime in the past the previous owner had removed and crimped shut the balancer pipe exits from the muffler. I wondered what people thought about this; I am not sure quite what the effect of not having a balancer pipe is... should I fabricate a new balancer pipe, or just leave it as it is?

Cheers

Andy


1976 Honda GL1000, a new purchase.....
1980 Moto Morini 500, 1960 BMW R60/2, 1972 BMW R60/5, 1973 BMW R75/5, all running and ridden through the summer.

1946 Harley WL45, three years in....
1960 Triumph TR3A sports car, many boxes.....

User avatar
dingdong
Posts: 3514
Joined: Thu Apr 08, 2010 8:35 am
Location: Oklahoma City
Motorcycle: 1976 gl1000
1993 gl1500
2004 NRX1800 Rune

Re: Exhaust balancer pipe

Post by dingdong » Mon Nov 19, 2018 8:02 am

Lots of guys use after market mufflers such as Harleys without the crossover pipe on their gl1000s with no problems. I doubt you will notice any difference at all.
Tom

John F. Kennedy would be impeached by todays liberal Democratic socialist party.

Saltspringer
Posts: 18
Joined: Fri Oct 19, 2018 3:33 pm
Location: Canada
Motorcycle: 1976 GL1000 in Antares Red

Re: Exhaust balancer pipe

Post by Saltspringer » Mon Nov 19, 2018 11:30 am

Good point. I would rather not have to fabricate a balancer pipe, so I think I will try it without and see how things go.

Appreciate the input.

Cheers

Andy
1976 Honda GL1000, a new purchase.....
1980 Moto Morini 500, 1960 BMW R60/2, 1972 BMW R60/5, 1973 BMW R75/5, all running and ridden through the summer.

1946 Harley WL45, three years in....
1960 Triumph TR3A sports car, many boxes.....

User avatar
SnoBrdr
Posts: 669
Joined: Fri Mar 07, 2014 9:01 am
Location: Providence, Rhode Island
Motorcycle: 1978 GL 1000

129K Original Owner

Re: Exhaust balancer pipe

Post by SnoBrdr » Mon Nov 19, 2018 2:20 pm

Saltspringer wrote:
Mon Nov 19, 2018 11:30 am
Good point. I would rather not have to fabricate a balancer pipe, so I think I will try it without and see how things go.

Appreciate the input.

Cheers

Andy
My bike has Harley pipes on it in my picture.

Very easy install.

Saltspringer
Posts: 18
Joined: Fri Oct 19, 2018 3:33 pm
Location: Canada
Motorcycle: 1976 GL1000 in Antares Red

Re: Exhaust balancer pipe

Post by Saltspringer » Tue Nov 20, 2018 3:28 pm

I am trying to retain the stock look and feel as much as possible so I can apply for collector status. Tempting as it is to go with aftermarket pipes, I think I should go with stock at the moment.

Cheers

A
1976 Honda GL1000, a new purchase.....
1980 Moto Morini 500, 1960 BMW R60/2, 1972 BMW R60/5, 1973 BMW R75/5, all running and ridden through the summer.

1946 Harley WL45, three years in....
1960 Triumph TR3A sports car, many boxes.....

User avatar
SnoBrdr
Posts: 669
Joined: Fri Mar 07, 2014 9:01 am
Location: Providence, Rhode Island
Motorcycle: 1978 GL 1000

129K Original Owner

Re: Exhaust balancer pipe

Post by SnoBrdr » Tue Nov 20, 2018 3:35 pm

Saltspringer wrote:
Tue Nov 20, 2018 3:28 pm
I am trying to retain the stock look and feel as much as possible so I can apply for collector status. Tempting as it is to go with aftermarket pipes, I think I should go with stock at the moment.

Cheers

A
You need it to be original in Canada to obtain that.

Wonder if it's different from getting an Antique registration here.

User avatar
dingdong
Posts: 3514
Joined: Thu Apr 08, 2010 8:35 am
Location: Oklahoma City
Motorcycle: 1976 gl1000
1993 gl1500
2004 NRX1800 Rune

Re: Exhaust balancer pipe

Post by dingdong » Wed Nov 21, 2018 8:23 am

79 on a 76 isn't stock. Totally different exhausts. But I get your point.
Tom

John F. Kennedy would be impeached by todays liberal Democratic socialist party.

Saltspringer
Posts: 18
Joined: Fri Oct 19, 2018 3:33 pm
Location: Canada
Motorcycle: 1976 GL1000 in Antares Red

Re: Exhaust balancer pipe

Post by Saltspringer » Wed Nov 21, 2018 6:43 pm

I am hoping that the difference between the two exhausts is relatively modest and ICBC will let it slide somewhat in my application for Collector status.

The principal difference is the absence of chrome heat shields on the actual muffler body of the 1979 (ish) exhaust. If any one has a couple of spare heat shields cluttering up their workshop and would be willing to part with them, please let me know. I would be interested.

I will post a picture or two when I am done.

Cheers

Andy
1976 Honda GL1000, a new purchase.....
1980 Moto Morini 500, 1960 BMW R60/2, 1972 BMW R60/5, 1973 BMW R75/5, all running and ridden through the summer.

1946 Harley WL45, three years in....
1960 Triumph TR3A sports car, many boxes.....

User avatar
SnoBrdr
Posts: 669
Joined: Fri Mar 07, 2014 9:01 am
Location: Providence, Rhode Island
Motorcycle: 1978 GL 1000

129K Original Owner

Re: Exhaust balancer pipe

Post by SnoBrdr » Wed Nov 21, 2018 6:54 pm

Saltspringer wrote:
Wed Nov 21, 2018 6:43 pm
I am hoping that the difference between the two exhausts is relatively modest and ICBC will let it slide somewhat in my application for Collector status.

The principal difference is the absence of chrome heat shields on the actual muffler body of the 1979 (ish) exhaust. If any one has a couple of spare heat shields cluttering up their workshop and would be willing to part with them, please let me know. I would be interested.

I will post a picture or two when I am done.

Cheers

Andy
The exhausts are totally different.

As far as the shields go, they are hard to find.

Especially the left one as the batteries always tended to drip on them and ate thru the chrome.

Same with the left side cover, very hard to find as they fall off as people would forget to latch them properly.

They why they came up with the tether system to save them from falling off.

Saltspringer
Posts: 18
Joined: Fri Oct 19, 2018 3:33 pm
Location: Canada
Motorcycle: 1976 GL1000 in Antares Red

Re: Exhaust balancer pipe

Post by Saltspringer » Wed Nov 21, 2018 7:21 pm

The quest for total originality is always hard. I doubt whether I will ever find a 1976 exhaust system for my bike; after 42 years any remaining example are probably severely rotted so a close substitute is the one that came loose with the bike. After some judicious chopping and welding it looks pretty close to the original and I have seen arguments made for items fitted to bikes looking for collector status that are "Period Correct" and I may end up playing this card if I get significant push back.

I will post a couple of photo's once it is all finished and you can see what it looks like.

Thanks for the information regarding the exhaust shields. I am pretty sure that they will be just as difficult to find as the original exhausts.... I am contemplating having my local chrome shop plate up a couple of pieces of 2" ID pipe as chrome slip over for the tail pipes of the mufflers. That's about as far as I think I want to go with matching the 79 mufflers to the look of the 76 pipes.

This weekend will be pin striping and then I will start on rebuilding the carbs. Once they are done I can refit them and see if the bike will start and run. Assuming all is well I will buy it a new battery and a set of tires and I should be set for the arrival of spring weather....

My Harley project is moving slowly and, once the Goldwing is completed, I need to reinstall the rebuilt transmission and fit the bodywork and ancillaries. I get a kick out of seeing both bikes side by side in my workshop; the Harley was built in 1946 and the Goldwing just 30 years later.... What a huge gulf in terms of mechanical sophistication and motorcycling technology.

Cheers

A
1976 Honda GL1000, a new purchase.....
1980 Moto Morini 500, 1960 BMW R60/2, 1972 BMW R60/5, 1973 BMW R75/5, all running and ridden through the summer.

1946 Harley WL45, three years in....
1960 Triumph TR3A sports car, many boxes.....

User avatar
SnoBrdr
Posts: 669
Joined: Fri Mar 07, 2014 9:01 am
Location: Providence, Rhode Island
Motorcycle: 1978 GL 1000

129K Original Owner

Re: Exhaust balancer pipe

Post by SnoBrdr » Wed Nov 21, 2018 7:28 pm

Saltspringer wrote:
Wed Nov 21, 2018 7:21 pm
The quest for total originality is always hard. I doubt whether I will ever find a 1976 exhaust system for my bike; after 42 years any remaining example are probably severely rotted so a close substitute is the one that came loose with the bike. After some judicious chopping and welding it looks pretty close to the original and I have seen arguments made for items fitted to bikes looking for collector status that are "Period Correct" and I may end up playing this card if I get significant push back.

I will post a couple of photo's once it is all finished and you can see what it looks like.

Thanks for the information regarding the exhaust shields. I am pretty sure that they will be just as difficult to find as the original exhausts.... I am contemplating having my local chrome shop plate up a couple of pieces of 2" ID pipe as chrome slip over for the tail pipes of the mufflers. That's about as far as I think I want to go with matching the 79 mufflers to the look of the 76 pipes.

This weekend will be pin striping and then I will start on rebuilding the carbs. Once they are done I can refit them and see if the bike will start and run. Assuming all is well I will buy it a new battery and a set of tires and I should be set for the arrival of spring weather....

My Harley project is moving slowly and, once the Goldwing is completed, I need to reinstall the rebuilt transmission and fit the bodywork and ancillaries. I get a kick out of seeing both bikes side by side in my workshop; the Harley was built in 1946 and the Goldwing just 30 years later.... What a huge gulf in terms of mechanical sophistication and motorcycling technology.

Cheers

A
You can actually still buy "new" OEM type exhausts for the 75-77 GLs.

They aren't cheap by any means and you can also get some really good looking used ones on EBay for some really good prices.

I bought a complete exhaust for the 78-79 GLs last year for under $100.

They came from California and they are pretty much 95/100.

Saltspringer
Posts: 18
Joined: Fri Oct 19, 2018 3:33 pm
Location: Canada
Motorcycle: 1976 GL1000 in Antares Red

Re: Exhaust balancer pipe

Post by Saltspringer » Wed Nov 28, 2018 2:22 pm

Nice! a good find.

I think stuff from the southern US is probably in much better shape that the damp west coast. I will keep looking to see if anything more local and in decent shape shows up. I am a long way from riding the bike and I have plenty of time.

Andy
1976 Honda GL1000, a new purchase.....
1980 Moto Morini 500, 1960 BMW R60/2, 1972 BMW R60/5, 1973 BMW R75/5, all running and ridden through the summer.

1946 Harley WL45, three years in....
1960 Triumph TR3A sports car, many boxes.....

cougla
Posts: 6
Joined: Tue Jul 28, 2009 6:40 am
Location: kincardine

Re: Exhaust balancer pipe

Post by cougla » Sun Dec 02, 2018 7:01 am

@ saltspringer

I have a set of very good set of 1975-1976 all original pipes for your project if you are interested.
email me at bigjer50@hotmail.com for details and pictures. I am in Ontario, where are you at?

Dalydude
Posts: 20
Joined: Sun Mar 30, 2014 3:18 pm
Location: Webster, MN
Motorcycle: Motobecan Moped
70 Honda CL100
82(?) Honda CM450a
82 Yamaha 850 Triple
1980 GL 1100 Goldwing

Re: Exhaust balancer pipe

Post by Dalydude » Mon Dec 03, 2018 6:13 pm

So, does anybody subscribe to the notion that, if Honda put it there, they did it for a reason? I was told that that washer in the oil filter "naah, it runs just fine without it".

The balance pipe is the same way. Why would Honda add weight to the bike if it didn't serve a purpose?

I say put it back in.

User avatar
SnoBrdr
Posts: 669
Joined: Fri Mar 07, 2014 9:01 am
Location: Providence, Rhode Island
Motorcycle: 1978 GL 1000

129K Original Owner

Re: Exhaust balancer pipe

Post by SnoBrdr » Tue Dec 04, 2018 6:28 am

Dalydude wrote:
Mon Dec 03, 2018 6:13 pm
So, does anybody subscribe to the notion that, if Honda put it there, they did it for a reason? I was told that that washer in the oil filter "naah, it runs just fine without it".

The balance pipe is the same way. Why would Honda add weight to the bike if it didn't serve a purpose?

I say put it back in.
I was told the washer was to keep tension on the spring to centrally locate the filter.

I replaced my stock exhaust with an HD setup, runs fine.

Have an almost new stock setup in the box,m might someday put it on but I really doubt it.



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