1977 gl1000

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Apinkston
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Re: 1977 gl1000

#226

Post by Apinkston »

Got the new coil in the mail today and got it hooked up and retimed everything. Now the bike is struggling to turn most times and sounds very hollow. Occasionally it fires a couple times. I’m hoping it’s just a timing issue and I missed a step or two
EDIT: Turns out it was a timing issue. I set it as early as possible but now it’s set almost as late as possible. I get spark directly on F1/F2
Apinkston
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Re: 1977 gl1000

#227

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Got it running today, and at first it sounded great, but it quickly changed. It was holding idle well but now it wants to die on idle. Smoking a bunch, but very responsive. I couldn’t get a video of it when it was running well, but I did get one when performance dropped off. It was too large for this site so here’s the YouTube link https://youtu.be/NrrQj6OemtU
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Whiskerfish
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Re: 1977 gl1000

#228

Post by Whiskerfish »

"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!!!!
Apinkston
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Re: 1977 gl1000

#229

Post by Apinkston »

Not sure what your message was supposed to say but I can’t see anything. It’s all blank. I was hearing a loud sound from the engine that I was able to get in a second video. Not sure what it is but it doesn’t sound good
https://m.youtube.com/shorts/s-SS3Yi6W1Y
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Whiskerfish
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Re: 1977 gl1000

#230

Post by Whiskerfish »

All I did was embed your video so others did not have to go to youtube. It is obviously still "sick", could be many causes. Me I would probably start with a fresh set of plugs and see what they look like after a bit. That might give you a direction to start. Check for spark on all 4 make sure the wires are in the correct spots check the timing again. Often times when one runs good for a bit then deteriorates it means something moved in the fuel system blocking a jet or two. So that is a possibility. That smoke when you hit the throttle in the first vid is usually an indication of unburnt fuel, so stuck float or plugged jet not atomizing. The knocking noise you hear would not concern me until it was running evenly on all 4 jugs.
"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!!!!
Apinkston
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Re: 1977 gl1000

#231

Post by Apinkston »

I have spark on all 4, but I’ll check the timing when I get off work. The fuel is clean and the carbs were just cleaned so I might try messing with the fuel/air mixture. Right now it’s set 2.5 turns out but I don’t remember having it at that when I first got the bike to run.
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gltriker
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Re: 1977 gl1000

#232

Post by gltriker »

This engine was unquestionably a mess before you tore it down. A creditable job to bring this one back.

But! Have you-

Rechecked all 8 valves lash clearance dimension after running the engine for the little time its been operating since reassembling? No? Set all 8 valve's lash clearance at 0.006" (Yes! don't fuss about it ;) )

Have you performed a complete session of individual cylinders' compression testing after putting the engine back together and re-checking all 8 valves lash clearance, beforehand?

Yes. List the results here.
Not yet. List the results here.

After accomplishing those required valve adjustments and cylinder compression testing, presuming everything is correct, hook up your carburetors idle speed synchronizing equipment and give us a video of the running engine behavior as indicated on the individual cylinders' synchronizing equipment displays.
Last edited by gltriker on Wed May 25, 2022 10:09 pm, edited 2 times in total.
Cliff (74yrs ;) )

Keep your eyes and ears open and you'll learn something new, everyday. tumb2

New users please visit our "Shop Talk" for common tips and help: <---jdvorchak
http://www.ngwclub.com/forum/page/ST
^^^^^^^click up here^^^^^ :oldies

RE: a thorough fuel tank cleaning
"And your carbs will thank you. They no longer live down stream from a sewage plant." -gregforesi tumb2
"Can't see the paint when your looking thru the handlebars..........." -Oldewing ;)
"I'd rather Ride than Shine" -RAT tumb2 Me Too!!

Cliff

'75 GL1000 home built trike; http://www.ngwclub.com/forum/viewtopic.php?f=30&t=39996
October,2017 BOTM :shock: https://nakedgoldwingsclub.com/forum/page/Welcome

previous rides:
1953 H-D Servi-car, naked, 1969-1978 (serial#53G1559 committed to memory!)
1980 CB900 Custom (triked) 1997-2003 .... R.I.P.
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gltriker
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Re: 1977 gl1000

#233

Post by gltriker »

Apinkston wrote: Wed May 25, 2022 8:45 am I have spark on all 4, but I’ll check the timing when I get off work. The fuel is clean and the carbs were just cleaned so I might try messing with the fuel/air mixture. Right now it’s set 2.5 turns out but I don’t remember having it at that when I first got the bike to run.
Don't mess. Set the pilot screws 3 turns out from seated. Don't try to twist the throttle open until the complete engine is at operating temperature. That's flirting with lean fuel mixture backfires which can individually damage a vacuum piston and fracture the button on top of their respective vacuum piston cap.
Cliff (74yrs ;) )

Keep your eyes and ears open and you'll learn something new, everyday. tumb2

New users please visit our "Shop Talk" for common tips and help: <---jdvorchak
http://www.ngwclub.com/forum/page/ST
^^^^^^^click up here^^^^^ :oldies

RE: a thorough fuel tank cleaning
"And your carbs will thank you. They no longer live down stream from a sewage plant." -gregforesi tumb2
"Can't see the paint when your looking thru the handlebars..........." -Oldewing ;)
"I'd rather Ride than Shine" -RAT tumb2 Me Too!!

Cliff

'75 GL1000 home built trike; http://www.ngwclub.com/forum/viewtopic.php?f=30&t=39996
October,2017 BOTM :shock: https://nakedgoldwingsclub.com/forum/page/Welcome

previous rides:
1953 H-D Servi-car, naked, 1969-1978 (serial#53G1559 committed to memory!)
1980 CB900 Custom (triked) 1997-2003 .... R.I.P.
Apinkston
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Re: 1977 gl1000

#234

Post by Apinkston »

Thanks for the to-do list. My only carburetor gauge set is for a 2 cyl but I have a 4 cyl gauge coming on Friday. Going to get a compression gauge today and when the weather cools down I will get to testing
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gltriker
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Re: 1977 gl1000

#235

Post by gltriker »

Apinkston wrote: Wed May 25, 2022 7:08 pm Thanks for the to-do list. My only carburetor gauge set is for a 2 cyl but I have a 4 cyl gauge coming on Friday. Going to get a compression gauge today and when the weather cools down I will get to testing
action1 Very Good!
Try your Very Best to get one with a 12mm adapter that threads directly into the 12mm spark plug hole. OK? ;)

Here's a link to a Compression Testing topic from November, 2021 which turned into a very good discussion.
It Includes part numbers.
viewtopic.php?f=1&t=76923

Especially notable is the double purpose 12mm Motion Pro compression tester/ leakdown tester adapter hose assembly .
google search for this: MOTION PRO #08-126Y – 4-STROKE LEAK DOWN TESTER REPLACEMENT 12MM HOSE
Cliff (74yrs ;) )

Keep your eyes and ears open and you'll learn something new, everyday. tumb2

New users please visit our "Shop Talk" for common tips and help: <---jdvorchak
http://www.ngwclub.com/forum/page/ST
^^^^^^^click up here^^^^^ :oldies

RE: a thorough fuel tank cleaning
"And your carbs will thank you. They no longer live down stream from a sewage plant." -gregforesi tumb2
"Can't see the paint when your looking thru the handlebars..........." -Oldewing ;)
"I'd rather Ride than Shine" -RAT tumb2 Me Too!!

Cliff

'75 GL1000 home built trike; http://www.ngwclub.com/forum/viewtopic.php?f=30&t=39996
October,2017 BOTM :shock: https://nakedgoldwingsclub.com/forum/page/Welcome

previous rides:
1953 H-D Servi-car, naked, 1969-1978 (serial#53G1559 committed to memory!)
1980 CB900 Custom (triked) 1997-2003 .... R.I.P.
Apinkston
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Joined: Sat Nov 13, 2021 11:35 pm
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Re: 1977 gl1000

#236

Post by Apinkston »

While checking valves I found something interesting. The locknut for cyl3 intake valve tappet is missing. I am at least 90% positive it was on when I put the motor back together, but I didn’t hear anything fall when I opened the cover.
Update:
Finished compression test showed same results before and after adjusting valve tappets. Cyl1-120kPa Cyl2-90kPa Cyl3-90kPa Cyl4-90kPa. Not too sure why Cyl1 has so much more compression but it’s firing
I put new spark plugs in and after compression testing, the knock was still there. Upon feeling the exhaust, I found Cyl3 is not firing. There is spark but if it’s not igniting then is it the carbs that are the issue? I want to make sure before I go and rip them out yet again
Apinkston
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Re: 1977 gl1000

#237

Post by Apinkston »

Got my carburetor gauges hooked up, and saw they’re all running the same. I pulled all the spark plugs and cranked the engine. Fuel was being shot out of cylinder 3 so I cranked until there was no more. No weird sound on dry cranks, but after all excess fuel was pumped out the bike started easier and didn’t knock nearly as bad. Still no firing on cyl 3 even with fuel and spark
Apinkston
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Re: 1977 gl1000

#238

Post by Apinkston »

I finally found some time to get work done. I pulled the carbs, tore apart the #3 carb and went through everything with carb cleaner. I put the missing valve tappet nut on, and put everything back together. The bike ran a tiny bit better, but still nothing on cylinder 3. After running the bike for about a minute varying the choke, it sounded good when rpm’s went up but struggled to hold an idle. #3 exhaust was slightly warm which is an improvement, still not sure what else can be done to bring cyl 3 back
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gltriker
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Re: 1977 gl1000

#239

Post by gltriker »

Apinkston wrote: Sat Jun 18, 2022 8:00 pm I finally found some time to get work done. I pulled the carbs, tore apart the #3 carb and went through everything with carb cleaner. I put the missing valve tappet nut on, and put everything back together. The bike ran a tiny bit better, but still nothing on cylinder 3. After running the bike for about a minute varying the choke, it sounded good when rpm’s went up but struggled to hold an idle. #3 exhaust was slightly warm which is an improvement, still not sure what else can be done to bring cyl 3 back
Without going back through this thread, here's some questions you need to answer.

.Are all 4 fuel bowl retaining screw threads intact on the carburetor body? The elongated portion of the fuel bowl gasket which covers the aluminum puck has to sufficiently compress the gasket which covers and seals the "idle" circuit passages.

..Is the passage crossing from the primary main fuel jet to the slow fuel jet, clear? Is the #35 slow fuel jet completely unobstructed?

...Is the tip of the adjustable air/fuel pilot screw broken off in its threaded hole?

....Is the brass pilot fuel discharge pipe that stands downstream from the throttle plate, unrestricted?
Its internal fuel passage extends past the fuel discharge hole. Probe to the far end of the passage with a small diameter
drill bit, or paper clip.

.....Has its discharge hole been rotated to a position other than pointing directly towards the cylinder head intake port?

All 4 carburetors have been dynamically idle speed synchronized? If not already performed, this also a diagnostic procedure should be at the TOP of the list, tumb2

Air leaks? The intake elbow's rubber sleeve clamped to the carburetor spigot is intact?
A New o-ring where it contacts the intake port?
Last edited by gltriker on Sat Jun 18, 2022 9:44 pm, edited 2 times in total.
Cliff (74yrs ;) )

Keep your eyes and ears open and you'll learn something new, everyday. tumb2

New users please visit our "Shop Talk" for common tips and help: <---jdvorchak
http://www.ngwclub.com/forum/page/ST
^^^^^^^click up here^^^^^ :oldies

RE: a thorough fuel tank cleaning
"And your carbs will thank you. They no longer live down stream from a sewage plant." -gregforesi tumb2
"Can't see the paint when your looking thru the handlebars..........." -Oldewing ;)
"I'd rather Ride than Shine" -RAT tumb2 Me Too!!

Cliff

'75 GL1000 home built trike; http://www.ngwclub.com/forum/viewtopic.php?f=30&t=39996
October,2017 BOTM :shock: https://nakedgoldwingsclub.com/forum/page/Welcome

previous rides:
1953 H-D Servi-car, naked, 1969-1978 (serial#53G1559 committed to memory!)
1980 CB900 Custom (triked) 1997-2003 .... R.I.P.
Apinkston
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Posts: 163
Joined: Sat Nov 13, 2021 11:35 pm
Location: Sacramento CA

Re: 1977 gl1000

#240

Post by Apinkston »

All 4 screws are good. The bowl seals tight and the puck is still in place. The slow jet is unobstructed aside from the rubber plugs in all 4 carbs. The air/fuel screws are all brand new and the brass tube downstream from the throttle flap is clean and pointing out towards the intake. I can’t dynamically set the idle yet but I have done it static. When I hook up my gauges they all read the same for the short time I get readings
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