Engine Noise


Information and questions on GL1200 Goldwings (1984-1987)
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BOOK70
Posts: 8
Joined: Fri Mar 02, 2012 9:30 am
Location: Charleston, Arkansas
Motorcycle: 1984 GL1200 Aspencade

Engine Noise

Postby BOOK70 » Tue Apr 23, 2013 3:38 pm



When I first start my GL1200 it has a noise like
There is gravel in the engine, I am unable to
Determine the location, after it warms up to
The noise just goes away.
Starts great runs great just that noise at first
Any ideas?


Capt. Marvin E. Booker
"Go Tigers"

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virgilmobile
Posts: 7660
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Engine Noise

Postby virgilmobile » Tue Apr 23, 2013 4:30 pm

Identify where the noise is coming from...
Mid engine.
Rear
Front
One side more than the other.

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seabee_
Posts: 494
Joined: Sun May 29, 2011 8:17 pm
Location: sterling heights, mi
Motorcycle: 1985 Honda Goldwing GL1200
117k miles
1977 Kawasaki kz400
1978 Suzuki GSXr750
1980 Kawasaki GPZ400
1975 Honda CB360T

Re: Engine Noise

Postby seabee_ » Tue Apr 23, 2013 11:09 pm

If you use the choke on warm up does it make the noise less noticeable? I assume it sounds like marbles loose in the engine. If the carbs are out of sync and unbalanced this can cause it. When was the last time the carbs were synched?
Paul
CE1 Navy Seabees/RET
1981 to 2002
ASE Mechanic

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BOOK70
Posts: 8
Joined: Fri Mar 02, 2012 9:30 am
Location: Charleston, Arkansas
Motorcycle: 1984 GL1200 Aspencade

Re: Engine Noise

Postby BOOK70 » Wed Apr 24, 2013 4:11 pm

Virgilmobile, from what I tell it is coming from
The lower area of the engine.

Seabee, I have no idea when they were
Last synchronized I bought it a year ago
And this year when I got it out from winter
Storage it began making the noise.
Capt. Marvin E. Booker
"Go Tigers"

User avatar
virgilmobile
Posts: 7660
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Engine Noise

Postby virgilmobile » Wed Apr 24, 2013 4:33 pm

I'll esplane just a little....From the crankshaft there is a very heavy duty chain...If the engine does not hit on all 4 cylinders evenly the chain will start to rattle about.Sounded like a bucket of bolts at 900 rpm.It yanking the chain,clutch and some gears about.

Usually this is attributed to carb sync but anything can cause a poor idle rhythm when cold.

The very first thing I would do is.......
with a cold engine,start the bike and let it idle ONLY for 5-8 seconds(don't let it get warmed up)Let it rattle away.
....Shut it off and lightly tap each header pipe.They should be starting to get warm.
Check each one for the same temperature

I had your same problem on a 83 Interstate...I found one cylinder was not firing when first started
(cold exhaust header pipe)but ran OK after a few minutes.

A misfire at a cold engine can have a few areas to look at....Like compression,spark plug,plug wires,carb problems,vacuum leak,etc...
Let us know what you find..
Mine was a poor sync and plugged idle jets which I resolved with home built equipment.I could finally run smooth from 400 rpm to 1500 with no noise.

User avatar
seabee_
Posts: 494
Joined: Sun May 29, 2011 8:17 pm
Location: sterling heights, mi
Motorcycle: 1985 Honda Goldwing GL1200
117k miles
1977 Kawasaki kz400
1978 Suzuki GSXr750
1980 Kawasaki GPZ400
1975 Honda CB360T

Re: Engine Noise

Postby seabee_ » Wed Apr 24, 2013 10:10 pm

Something you can do to help clean the carbs is to run 1/2 a can of seafoam in a full tank of fresh gas. Ride it around enough to work the seafoam into the carbs and let it sit overnight. The seafoam will help to clean the small passages in the carb. It isn't a sure fix all the time but good to do every spring.
Paul
CE1 Navy Seabees/RET
1981 to 2002
ASE Mechanic

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BOOK70
Posts: 8
Joined: Fri Mar 02, 2012 9:30 am
Location: Charleston, Arkansas
Motorcycle: 1984 GL1200 Aspencade

Re: Engine Noise

Postby BOOK70 » Fri Apr 26, 2013 4:52 pm

Thanks guys I now have somewhere to start.


Capt. Marvin E. Booker
"Go Tigers"


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