Compression Leak? Sayeth the Man...


Information and questions on GL1500 Goldwings (1988-2000)
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StrongEagle
Posts: 29
Joined: Mon May 04, 2015 10:04 am
Location: Houston, TX
Motorcycle: Formerly 3 different Honda Valkyries, now looking at a 1200 GW.

Compression Leak? Sayeth the Man...

Post by StrongEagle » Thu Feb 07, 2019 12:42 pm



What say ye? In my ̶v̶a̶s̶t̶ limited experience, a cylinder(s) that won't hold compression has ring problems or valve problems, maybe even head gasket issues, and either way, it's an expensive repair.

This fellow says "compression leak" and I wonder if you all can put on your "Click and Clack, Tappet Brothers" hats and render an opinion as to what the issue may be with this bike. Almost seems impossible on a nearly bullet proof engine, especially a 99 model.

TIA

https://odessa.craigslist.org/mcy/d/for ... 23593.html



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MikeB
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Location: Tacoma, WA
Motorcycle: 1998 - GL1500 Aspencade.
2003 - GL1800A

Re: Compression Leak? Sayeth the Man...

Post by MikeB » Thu Feb 07, 2019 1:06 pm

Why would you need the chokle (fuel enrichment) on in first gear for a compression leak? A '99 with 61,000 miles on it?
I'm thinking that it has sat idle for a quite a while and the idle jets, which are usually immersed in fuel, have clogged and is now causing a low RPM issue.
My '99 did the same thing. I had to have the carb cleaned. Once cleaned, it ran like new again.
I think it is a case of mis-diagnosis.
MikeB
Tacoma, WA, USA

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RockportDave
Posts: 349
Joined: Sat Mar 31, 2018 9:39 pm
Location: Rockport Texas
Motorcycle: 1999 GL1500 SE

Re: Compression Leak? Sayeth the Man...

Post by RockportDave » Thu Feb 07, 2019 9:25 pm

It could be vacuum leaks or as MikeB said dirty carbs. It could possibly be a tight valve shim keeping a valve slightly open. And as the add says, may be bad compression from burnt valve or bad head gasket. I would have to hear it run and ride it to have any idea of what it could be. A compression test would tell a lot.
I bought my 1999 last March with just under 40,000 miles on it. It took almost a full tank of gas to go 50 miles to home. I knew it needed carb work, but the engine sounded strong, the transmission shifted good and no abnormal sounds.
Dave
1999 GL1500SE 5th Goldwing through the years

Rodzim
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Location: Smyrna, ga
Motorcycle: 1994 gl1500 se

Re: Compression Leak? Sayeth the Man...

Post by Rodzim » Thu Feb 07, 2019 10:10 pm

I would jump all over that thing, it looks like a killer deal. I can guarantee a heavy dose of seafoam and a good beatdown will have that thing purring in no time

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wingdings
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Location: mells , England, United Kingdom
Motorcycle: Honda Goldwing gl 1989

Re: Compression Leak? Sayeth the Man...

Post by wingdings » Tue Feb 12, 2019 3:46 pm

Hi - saw your post there !! have you pulled the spark plugs out and had a good look at them all ?? - if not take a look at this how to - you can learn a awful lot from looking at your plugs - viewtopic.php?t=13929 hope this help :D :D :D :D

89 1500
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Location: Texas
Motorcycle: 92 GL1500

Re: Compression Leak? Sayeth the Man...

Post by 89 1500 » Tue Feb 12, 2019 8:00 pm

2K for a 99 is a steal even if it has something terminally wrong the parts would bring that and a lot more. My 89 did exactly the same thing when the carbs sucked up some trash, had to use choke until off idle and moving a bit. Wished I had the money sitting around I'd go get it tomorrow. Disassemble and vat the carbs, order slide diaphragm kits, accelerator pump and insulators, clean the tank and replace the fuel lines while it's down that far. Well knowing me I'd seafoam the crap out of it with some fresh fuel first lol. That stuff is awesome. I used it in my 77 KZ 900 that sat in a shed for 7 years. 2 cans and 3 gallons of gas. Start run shut off....repeat often. After 6 hours later the old 900 was running fine and I took it on a 1700 mile run 2 weeks later.

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StrongEagle
Posts: 29
Joined: Mon May 04, 2015 10:04 am
Location: Houston, TX
Motorcycle: Formerly 3 different Honda Valkyries, now looking at a 1200 GW.

Re: Compression Leak? Sayeth the Man...

Post by StrongEagle » Tue Feb 12, 2019 10:53 pm

It's mighty tempting. It's also 500 miles, one way, from my house... I dunno. Tempting.



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