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Discussion Starter #1
Hello everyone.
My name is Francois and I decided to run a new quest.

I just purchased a 1984 Goldwing that appears to be a Standard GL1200 that was fitted with GL1100 fairing.

The bike is currently working , but have a pretty bad knock on the right side of the engine.

I know, she is dirty, almost filthy but I have big plan for her when I have time.

Hoping to increase and share my learning with you all.

322072
 

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Discussion Starter #4
ok, I ran a compression test this morning and cyl4 is low. a diy leakdown is telling me valves are closing but I can't pinpoint the leak. so I am soaking the cylinders in marvel mystery oil for the next few days to see if this improve anything. if not, I'll pull the heads to figure what is going on.
I just need to be patient now
 

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Hallo fflipski

Welcome on this nice forum. Wish you al the best.
And good luck with your Wing.
 

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02 GL1800 w/Auto Pilot
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sounds like a Tech thread, I am going to move you over to the Tech forum.

glad to have you on board here.
 

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ok, I ran a compression test this morning and cyl4 is low. a diy leakdown is telling me valves are closing but I can't pinpoint the leak. so I am soaking the cylinders in marvel mystery oil for the next few days to see if this improve anything. if not, I'll pull the heads to figure what is going on.
I just need to be patient now
You have a knock on the right and low compression on the left & missing timing covers, hope you got it cheap.
 

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Discussion Starter #8
hope you got it cheap.
is $400 cheap enough?. brakes and tires are almost new. a few dings here and there. nothing that can't be fixed cheaply

I do have the covers. just out for now for checking timing

I knew what I was getting into.

when turning over without Sparks, the motor runs freely. knock comes with Sparks.

I've flooded the cylinders with mmo. I am trying the $4 fix before tearing it down.

I secretly want it to not work so I can tear it down.
 

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1987 GL1200 Interstate
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$400 for that bike is not really cheap.

Be careful what you wish for. A tear down of that motor will be very frustrating. There are parts that simply are no longer available. From Honda or the aftermarket.
 

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Discussion Starter #11
Well, I am a bad mechanic. I should have looked into the bike a bit further before messing with the block.

I let the cylinder soak in MMO for the past few days and tried a compression test again. cyl4 was acting a bit better but still at 60psi cold. So I remembered to open the throttle for true compression test, and SURPRISE, cyl4 now show 120psi !!!!!! like all others. no wonder I couldn't find a leak during the leakdown. My intake is heavily restricted.

So , after a 9 hrs work day, I decided to look into the carbs.

YUCK! lots of broken vacuum lines , plenum filled with seeds and other mouse/rat food. plenum cover was sealed by someone that didn't want to fix it.

So, I wrapped the motor to prevent moisture to enter and got the carbs out. I've noticed that reorienting the intake ports allowed me to get the clearance I needed to slide them to the side.
So now the beast is out and ready for a complete cleanup/rebuild.

With all the junk, frozen choke bits and leaking vacuum hoses, I am amazed how the bike actually was running. not on all 4, but still pretty impressive.

322134


the plenum cover being shot, I find a thread of someone replacing it with aluminite and I am thinking of doing the same but with some stainless steel that I have sitting around the garage. if you know of another intake plenum mod, let me know.

Question for the experts.
since the ignition module has a vacuum sensor, does this means my pinging/knock could be because the module detected a WOT condition and advanced the timing too much ?
 

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Unlikely as it needs the vac to advance timing and if hose are gone you wont get vac
 

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Question for the experts.
since the ignition module has a vacuum sensor, does this means my pinging/knock could be because the module detected a WOT condition and advanced the timing too much ?
No, the trans has to be in 4th or 5th gear for the vacuum to effect the timing. The knock could be the carbs out of synch.
 

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… ETC …

the plenum cover being shot, I find a thread of someone replacing it with aluminite and I am thinking of doing the same but with some stainless steel that I have sitting around the garage. if you know of another intake plenum mod, let me know.

Question for the experts.
since the ignition module has a vacuum sensor, does this means my pinging/knock could be because the module detected a WOT condition and advanced the timing too much ?

I'd do it in Aluminum as it's easier to drill and cuts nice on my Shop-Smith's bandsaw with fine tooth 1/4" blade, and if you use SS that's rigid enough, gonna be tough. 1/8" or 3/16 aluminum is just a better material for it I think.

Before I'd go SS … I'd get some ABS sheet and repair/reinforce the OEM one, but first examine OEM to be sure if it's ABS too. It'll be marked.
Depending on damage, I might would even just use aluminum & pop rivets and washers to repair/strengthen the ABS OEM plate. I've seen the ABS sheet on Ebay.
 

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Discussion Starter #15
322184


well, that carb setup is toasted. it caught on fire at some point. while all jets and bowls were fine. I didn't feel like messing with it anymore so I went on eBay and ordered a used set. including the top plenum cover for $130.

I ordered some new cables too for choke and throttle.

should have everything done by next week and have a verdict on engine health.
 
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