1977 gl1000

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Whiskerfish
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Re: 1977 gl1000

#241

Post by Whiskerfish »

Did you do the compression test with the throttle held wide open? That makes a big difference. Do you have more than 1 old wing? Often when chasing an issue like this I swap the entire carb rack from a good running bike just to verify the cause before I start running in circles.
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"The book is wrong, this whole Conclusion is Fallacious" River Tam
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Re: 1977 gl1000

#242

Post by Apinkston »

When I did the compression test I didn’t do it with the throttle open. I haven’t heard of that before and I figured I didn’t need to but I will retest with open throttle. And I don’t have a spare wing to test on. This one is my first and only and I don’t have the room to get another or to even get a good engine to keep aside. I have another carb set but it is salvage
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Re: 1977 gl1000

#243

Post by Apinkston »

Ran the compression test once again with throttle open. Each cylinder was getting 135 psi except cyl3 which had 120psi. Ran a leak down test, and all cylinders except #3 were under 20% leak. Cyl3 had 60% leak. My gauge doesn’t specify if it’s valve or rings, but it was in the moderate zone. Still I’m not so sure it’s in the cylinders. Cyl3 exhaust has been warming up when I run the bike. Not as hot as the others but it’s not cold. I got some firing at higher rpms. I’m taking my carbs into a shop who was willing to try their hand at it, but how much of a headache is piston rings?
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Whiskerfish
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Re: 1977 gl1000

#244

Post by Whiskerfish »

You did the heads right? including a lap on the valves? That reduces them as a possible cause. Me I would probably try to give it a couple hundred miles and redo the Comp test/ leak down and see how it responds.
"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!!!!
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robin1731
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Re: 1977 gl1000

#245

Post by robin1731 »

What he said. ^^^^^^^^^^^^^^^^^^

But, if you used a leakdown tester the gauge will not tell you where the "leak" is. You have to listen at the end of the exhaust, near the air intake, and at the crankcase breather.
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Re: 1977 gl1000

#246

Post by Apinkston »

Thanks for the ease of worry. I did lap the valves when I did the heads. I might have messed up one but all the others hold up well. I did not hear anything from the exhaust but there was a small puddle of gas in #3 exhaust. I will continue to run the engine when I can but it’s going to be a solid minute until this bike is on the road. I still need to do tires and brakes at best. Just a tad bit of carb work too since it won’t hold idle too long
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Re: 1977 gl1000

#247

Post by Apinkston »

Ran the engine yesterday and was pleased for the most part. I believe I got cyl 3 to pick up with the choke on and once the engine was warm enough it stayed going at a fast idle. Here is the link to the video I took and at the end you can hear the cylinder drop as the idle drastically changes. I didn’t have any hands on the bike when it dropped either. Please note that there are only headers on the exhaust and no Hpipe or mufflers at the moment
https://m.youtube.com/watch?v=Cx1_p1sPwWA
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Re: 1977 gl1000

#248

Post by Apinkston »

I forgot to mention earlier that I had drained the oil after everything. The oil is a dark mud brown in color, nothing floating in it, but does smell of gas when I put my nose up to it. Is it normal for gas to seep in on these old wings or do I most definitely have broken piston rings? This bike has never wanted to cooperate and if it is piston rings I’m going to have to junk the whole thing. No interest in a 2nd tear down
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Whiskerfish
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Re: 1977 gl1000

#249

Post by Whiskerfish »

If there is an excess of gas in the top of the cylinders it WILL get past the rings. That is one of the reasons we harp about shutting off the petcock when the bikes are parked. If a float or float valve sticks (or is poorly adjusted) and it allows fuel to overflow in the bowls it will drain into the jugs and can hydrolock the engine resulting in bent con rods, or diluted oil. So if you feel like there is gas contamination in the oil the very first suspect is unfortunately still a Carb issue.
"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!!!!
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RogueCreature
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Re: 1977 gl1000

#250

Post by RogueCreature »

have you been working on your project at all?
1977 GL1000
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Re: 1977 gl1000

#251

Post by Apinkston »

RogueCreature wrote: Mon Jul 17, 2023 7:59 pm have you been working on your project at all?
Unfortunately I have not. Last summer (2022) I hurt my back and could not manage working on the bike with the setup I had. Shortly after, cylinder 3 started dying on idle and made the whole bike sound like a tractor. I also couldn’t get the clutch to work and with that being the icing on the cake I decided to get rid of the bike. Looking back I wish I didn’t, but I also didn’t have the space to hold onto something I wasn’t using.
However, I want to get back into the goldwings. This time with a Valkyrie. The Valkyrie has always intrigued me since I found out about them, and I’m looking at one online. I wanted to ask if you guys have any experience with them? I know they’re basically goldwings just with two more cylinders, but this one is also 20 years newer than the gl I’m familiar with so I know there’ll be a difference. Any opinions on the Valkyrie good or bad, I’m all ears.
And sorry for just disappearing from here
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Re: 1977 gl1000

#252

Post by Fred Camper »

Many have Valks on here and all seems to think they are great. So if you get one, let us know.
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Re: 1977 gl1000

#253

Post by digger »

Also, if you get a Valkyrie, make sure to shut off the petcock when parked, with six carburetors you have an even greater chance of a hydrolock and/or fuel leaking down into the crankcase. They are wonderful bikes, but I just can’t afford one at the moment or it would be in my garage. :(
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Re: 1977 gl1000

#254

Post by wingrider »

Valks are great, but the carbs can be slightly fickle....They do not like to sit very long. There are some things you can do to them to reduce the threat of hydrolock, which I recommend get done if it hasn't been done before. They are big bikes, your 77 would feel small if you could switch back and forth.
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Apinkston
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Re: 1977 gl1000

#255

Post by Apinkston »

Thanks for the heads up. I saw this one Valkyrie build where they put carbs from a 68 Porsche on velocity stacks on the bike. Genuinely made the bike sound like a Porsche so that was something I wanted to look into. My first objective however is just to get it running and driving on its own power. The listing says it has a NOS port setup so I’m a little skeptical but I won’t know until I rip it apart
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