78 GL1000 Exhaust
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- Lucien Harpress
- Honored Life Member
- Posts: 4077
- Joined: Sat Dec 24, 2011 11:41 am
- Location: Michigan
Re: 78 GL1000 Exhaust
1997 Valkyrie- Light Cutomization, but Too Busy Riding
1980 KZ1300- Bike's Haunted
1976 GL1000 (Yellow)- It Runs (Poorly) and Doesn't Leak (Mostly)
1974 Velosolex 3800- Better Than Walking
1972 CB750- Broke the Chain And Ate the Motor
1969 CT90- The Most Fun You Can Have on 90ccs.
1965 CA77 Dream- Needs a Full Teardown, but Complete
All advice I give is only valid until an expert corrects me.
1980 KZ1300- Bike's Haunted
1976 GL1000 (Yellow)- It Runs (Poorly) and Doesn't Leak (Mostly)
1974 Velosolex 3800- Better Than Walking
1972 CB750- Broke the Chain And Ate the Motor
1969 CT90- The Most Fun You Can Have on 90ccs.
1965 CA77 Dream- Needs a Full Teardown, but Complete
All advice I give is only valid until an expert corrects me.
- pidjones
- SUPER BIKER!!!!
- Posts: 3237
- Joined: Wed May 22, 2013 4:06 pm
- Location: East TN
Re: 78 GL1000 Exhaust
Great! Now, take a scribe or small screwdiver to MAKE SURE there are no (sometimes more than one) copper gaskets compressed and darkened up in the head exhaust ports. I once pulled six total (out of four ports) from one engine.
"Love 'em all.... let God sort 'em out!"
Ex 2006 GL1800 - the Black Pearl SOLD! to make room for:
2021 Can-Am Spyder RT Limited Dark Chalk Metallic
1975 Red GL1000 project - ex Pistol Pete project
1972 Triumph T150V Trident rescue - finished and FOR SALE!
1976 Yamaha RD400c
1978 GL1000 with '75 engine - the Hunley
Ex 1978 GL1000
Ex 1979 GL1000
Ex '79 CB750F rat bike
Ex '86 SEi
Ex '77 GL1000
Ex '76 RD400
Ex '72 Penton 125 set up for flat track
Ex '73 RD250
Ex '68 TR6C - chopped
Ex 2006 GL1800 - the Black Pearl SOLD! to make room for:
2021 Can-Am Spyder RT Limited Dark Chalk Metallic
1975 Red GL1000 project - ex Pistol Pete project
1972 Triumph T150V Trident rescue - finished and FOR SALE!
1976 Yamaha RD400c
1978 GL1000 with '75 engine - the Hunley
Ex 1978 GL1000
Ex 1979 GL1000
Ex '79 CB750F rat bike
Ex '86 SEi
Ex '77 GL1000
Ex '76 RD400
Ex '72 Penton 125 set up for flat track
Ex '73 RD250
Ex '68 TR6C - chopped
- 5speed
- Honored Life Member
- Posts: 5312
- Joined: Sat Jul 11, 2015 2:37 pm
- Location: Nova Scotia Canada
Re: 78 GL1000 Exhaust
1982 1100 standard. (sold)
1986 Yamaha FJ1200
2000 Yamaha Roadstar
1976 GoldWing. running but not on the road
1978 Goldwing. future cafe project.
2019 Can-Am ryker (boss's new ride)
2002 Shadow American Classic(sold)
1983 Shadow 500. (sold)
1986 Yamaha FJ1200
2000 Yamaha Roadstar
1976 GoldWing. running but not on the road
1978 Goldwing. future cafe project.
2019 Can-Am ryker (boss's new ride)
2002 Shadow American Classic(sold)
1983 Shadow 500. (sold)
-
- Zinc Member
- Posts: 51
- Joined: Thu Oct 27, 2016 10:00 am
Re: 78 GL1000 Exhaust
Definitely the old seals. So far, I haven't touched the big muffler. I started with the crossover piece basically soaking one end in penetrating oil while the other in some Permatex gasket removal. I'm afraid neither are doing a very good job at all. I actually have a spare crossover pipe I bought off eBay just to get the OEM clamps, but the piece was in such good shape I decided to use it rather than the piece that came with the set. Hate to admit this but I may just go back to using the original crossover piece and go with all original seals... adding a new seal to the right side where there wasn't one. This stuff is a career maker, there just ain't anything out there to make it easier. Using the 180-220 grit sanding wheels or metal sharpener stone wheel with my dremel sounds easiest but the sanding wheels evaporate in no time. Wire brush wheel may be okay in final cleanup but doesn't seem to help much at this point. I had some luck using a screwdriver or wooden tongue depressor pushing through the split ends but can't get anything going. Grabbing with needle nose pliers and rolling simply tears off till you got nothing to grab. My chisel is a bit large so I'd need to get one smaller or try a flathead, I may try it before I give up. Crazy.
- 5speed
- Honored Life Member
- Posts: 5312
- Joined: Sat Jul 11, 2015 2:37 pm
- Location: Nova Scotia Canada
Re: 78 GL1000 Exhaust
take a hack saw blade and cut it into sections..then sacrifice a screw driver to the honda gods and use it as a chisel..
1982 1100 standard. (sold)
1986 Yamaha FJ1200
2000 Yamaha Roadstar
1976 GoldWing. running but not on the road
1978 Goldwing. future cafe project.
2019 Can-Am ryker (boss's new ride)
2002 Shadow American Classic(sold)
1983 Shadow 500. (sold)
1986 Yamaha FJ1200
2000 Yamaha Roadstar
1976 GoldWing. running but not on the road
1978 Goldwing. future cafe project.
2019 Can-Am ryker (boss's new ride)
2002 Shadow American Classic(sold)
1983 Shadow 500. (sold)
- Whiskerfish
- President
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- Location: Norfolk Va
Re: 78 GL1000 Exhaust
Make sure to wear a mask while working on those gaskets/seals. Not sure what they are made from but can't be good to breath.
"Agreement is not a requirement for Respect" CDR Michael Smith USN (Ret) 2017
"The book is wrong, this whole Conclusion is Fallacious" River Tam
2008 GL1800 IIIA "TH3DOG"
1975/6/7/8/9 Arthur Fulmer Dressed Road bike
1975 Naked Noisy and Nasty in town bike
and a whole garage full of possibilities!!
Psst. oh and by the way CHANGE YOUR BELTS!!!!
"The book is wrong, this whole Conclusion is Fallacious" River Tam
2008 GL1800 IIIA "TH3DOG"
1975/6/7/8/9 Arthur Fulmer Dressed Road bike
1975 Naked Noisy and Nasty in town bike
and a whole garage full of possibilities!!
Psst. oh and by the way CHANGE YOUR BELTS!!!!
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- Zinc Member
- Posts: 51
- Joined: Thu Oct 27, 2016 10:00 am
Re: 78 GL1000 Exhaust
Will keep that hack saw trick in mind and yes, I did break down and wore a mask after seeing some warnings. Well, I stuck with it but decided to use my smallest screwdriver. I just kept rotating around tapping on it deeper and deeper keeping the screwdriver flush till the seal finally broke loose. 2 of 3 actually came out pretty clean 1 piece, the other in 2 bands with just a little bit of the bottom sticking. Honestly, I was shocked how easy they came out. Everything I saw about soaking in liquids didn't work for me, at all. After I got em out I used a brass wire wheel followed by the 220 grit wheel to clean up, along with wiping everything down really good. Don't think I caused any damage. You guys know if the new seals just go in as is, or would you use a little bit of copper exhaust sealant?
- Lucien Harpress
- Honored Life Member
- Posts: 4077
- Joined: Sat Dec 24, 2011 11:41 am
- Location: Michigan
Re: 78 GL1000 Exhaust
They should be fine as-is. Truth be told, it really won't hurt anything if the muffler-to-header joints aren't 100% air-tight. Don't get me wrong, you should get them to seal as well as you're able, but at the same time they're definitely less critical compared to something like the joint between the headers and the block.
1997 Valkyrie- Light Cutomization, but Too Busy Riding
1980 KZ1300- Bike's Haunted
1976 GL1000 (Yellow)- It Runs (Poorly) and Doesn't Leak (Mostly)
1974 Velosolex 3800- Better Than Walking
1972 CB750- Broke the Chain And Ate the Motor
1969 CT90- The Most Fun You Can Have on 90ccs.
1965 CA77 Dream- Needs a Full Teardown, but Complete
All advice I give is only valid until an expert corrects me.
1980 KZ1300- Bike's Haunted
1976 GL1000 (Yellow)- It Runs (Poorly) and Doesn't Leak (Mostly)
1974 Velosolex 3800- Better Than Walking
1972 CB750- Broke the Chain And Ate the Motor
1969 CT90- The Most Fun You Can Have on 90ccs.
1965 CA77 Dream- Needs a Full Teardown, but Complete
All advice I give is only valid until an expert corrects me.
-
- Zinc Member
- Posts: 51
- Joined: Thu Oct 27, 2016 10:00 am
Re: 78 GL1000 Exhaust
Thanks Lucien!!
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