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post #1 of 32 (permalink) Old 05-08-2017, 07:51 PM Thread Starter
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"New" 1988 gl1500

Hello, I have recently became proud owner of a 1988 GL1500. As expected there are a "few" problems. My main concern is there is severe popping on acceleration and deceleration. It surges on idle also. From what I've learned this could be a large vacum leak. However there is a "very noticeable" misfire, like a loud pop from the exhaust randomly. Sometimes it occurs frequently and sometimes a minute or two will go by between them. I haven't found any holes in the exhaust, but i do know the left muffler is missing it's gasket. Any thoughts on causes? Thank you in advance for your input.

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post #2 of 32 (permalink) Old 05-08-2017, 08:45 PM
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You may want to replace the missing gasket (seal up the exhaust) then see what remains. When you have multiple issues, it is best to address/correct one at a time.
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post #3 of 32 (permalink) Old 05-08-2017, 09:20 PM Thread Starter
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Fund wise that's what I'm going for, don't have a lot of cash flow currently.

On the way home I could actually hear the vacuum leak when it was warming up, so that's next on the list

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post #4 of 32 (permalink) Old 05-08-2017, 09:55 PM
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There is a problematic vacuum hose on the left side just above the cylinder head. Has a sharp bend in it. Easy to access and check. Mine was bad when I bought it. The other known bad one is under the carb rubber mat, harder to access. Get a spray can of starter fluid and spray around all the hoses you can get to (engine running) If idle increases you found a leak.
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post #5 of 32 (permalink) Old 05-08-2017, 10:27 PM Thread Starter
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Got it, thanks guys, I'll let you know if it works

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post #6 of 32 (permalink) Old 05-09-2017, 12:15 AM
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fix exhaust leak- often its just manifold nuts loosened (hoping thats all mine has wrong)
That alone will cause other problems.

Agree with above post on vac lines, especially the 90 degree one
Water in a spray bottle finds vac leaks without the FIRE! danger from randomly spraying carb cleaner
I was a carb cleaner type until educated on here~
corkya likes this.
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post #7 of 32 (permalink) Old 05-09-2017, 12:21 AM
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and congrats on becoming an Official Wing Herder,
I bet herding nerfs is easier than learning about riding the Wing IN parking lots, and learning ON parking lots!

2 sets of tennis balls cut in half are your new friend. See youtube: Goldwing Parking lot figure 8s and Uturns

Seafoam at 2 oz per gallon of fuel thru 4 tanks will do wonders inside the carb and pistons.
Use in engine oil, add 4 oz. and ride 100-200 miles
Must drain oil when warm from 15 minute freeway blast.

No I do not own stock in seafoam...bummer for me
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post #8 of 32 (permalink) Old 05-09-2017, 06:41 AM Thread Starter
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There is an msf parking lot on base I'll be practicing on, I already started using seafom in the tank, the fire sounds more fun, and thank you for all your help tom✌️

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post #9 of 32 (permalink) Old 05-09-2017, 08:29 PM
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The seafoam ratio is important to its operation, less than 3/4 oz per gal is ineffective
and more than 2 oz per gal fuel is throwing money away,
Thats from the Seafoam Tech rep!
4-5 tanks at that strength will amaze you, then midyear do 1 or 2 tanks at 1 oz per gal.

You have a training course! The tennis balls establish visual reference points- keep looking up and ahead in the Uturn and figure 8 practice
2000 rpm steady is the trick, slip the clutch to control bank angle, use rear brake for speed thru the turn

Our flywheel making a nice gyroscope near the center of gravity, give it some rpm and it does its job keeping the bike steady in tight cornering.
Works for straight slow-speed coming to a light, or in slow ride contest against a harley at bike rally.
Be prepared to leave the scene quickly if you beat too many of them- one run and done!

Some rpm keeps the bike upright, control forward speed with rear brake, and the steering stays straight
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post #10 of 32 (permalink) Old 05-09-2017, 11:29 PM Thread Starter
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I found a vacuum leak, does anyone know what this goes to?

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