engine noise


Information and questions on GL1200 Goldwings (1984-1987)
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chopper121066
Posts: 2
Joined: Wed Jun 11, 2014 8:06 pm
Location: gf-windsor,nl,canada
Motorcycle: 1983 gl1100 interstate

engine noise

Postby chopper121066 » Fri May 27, 2016 3:56 pm



hi, I have a 85 gl1200a and when I started it today and ran it for awhile at idile speed, when it warmed up I got a noise from the right side off the engine. but it would go away for a few mins and then start again. and when you give it a little more gas and bring the rpms up it would go away, and come back again at idile after a few mins. anyone have any idea what could be doing this? :idea:



JoeEatTaco
Posts: 3
Joined: Fri May 27, 2016 5:43 pm
Location: Michigan
Motorcycle: 1987 GL1200A Aspencade

Re: engine noise

Postby JoeEatTaco » Fri May 27, 2016 11:23 pm

Any chance you could give a bit more detail in regards to the type of noise? i.e. squeal, clunk, click, grinding.

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Wilecoyote
Posts: 18
Joined: Wed Apr 30, 2014 8:46 am
Location: Broken Arrow, Oklahoma
Motorcycle: 1985 gl1200 aspencade

Re: engine noise

Postby Wilecoyote » Sat May 28, 2016 7:03 am

Mine has done that too recently. Found mine is coming from fuel pump. I could place my hand on the fuel pump and feel it pulse with the noise.

chopper121066
Posts: 2
Joined: Wed Jun 11, 2014 8:06 pm
Location: gf-windsor,nl,canada
Motorcycle: 1983 gl1100 interstate

Re: engine noise

Postby chopper121066 » Sat May 28, 2016 10:33 am

Oh ya sorry, it's sounds like more off a clunking noise, it starts off low and then gets louder and then it stops for awhile and after a few mins it starts again. But seems like it only does it when the bike warms up too normal riding temp and at idle. And the idle speed is always rising and dropping by a 100 or 150 rpms never seems to stay steady. thanks

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twocams
Posts: 554
Joined: Tue Sep 29, 2015 11:25 am
Location: Grants Pass, Oregon
Motorcycle: 1985 GL1200 Aspencade, 2003 K1200GT BMW, 1969 R69S BMW
Sold : 84 V65 Magna, 82 Moto Guzzi, XS 1100 Yamaha,84 Wing Int., 80 650 Special, Only new bike 82 XV750 Virago (Guam),Honda 250,84 R100RT BMW,87 K100 LT BMW,93 K1100 LT BMW, 91 535 Virago, Honda 50

Re: engine noise

Postby twocams » Sat May 28, 2016 10:45 am

Does it sound like its coming from inside the valve cover? I would be tempted to remove the valve cover and check valve train, springs,rockers,nuts and bolts for looseness etc.

twocams

Rusty Bike
Posts: 271
Joined: Sun Feb 28, 2016 1:55 pm
Location: New castle, PA
Motorcycle: 86 GL1200 SEi, 78 Yamaha XS750SE, 86 Honda XL125, 4.5 HP belt drive Minibike my dad built, foot clutch!

Re: engine noise

Postby Rusty Bike » Sat May 28, 2016 10:57 am

You can locate noises by using a length of plastic tubeing, I like 3/8-1/2" stuff. Put tube to your ear then press other end onto suspected noise maker. Use like a stethoscope. A long screwdriver or piece of broomstick works also but I prefer the tubing.

Is there enough oil in the bike? Obvious question but had to ask...Rusty

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Maz
Posts: 237
Joined: Tue May 19, 2015 4:43 am
Location: Kent, UK
Motorcycle: 1975 GL1000K1
1976 CB500T
1979 CB750L
1990 Yamaha FJ1200

Re: engine noise

Postby Maz » Sat May 28, 2016 12:33 pm

I think the rising and falling idle speed may be a clue. Possibly one cylinder is cutting in and out and these engines sound very 'knocky' when not running evenly at idle. May be spark or idle mixture related.

Maz
Nostalgia is not what it used to be!

Rusty Bike
Posts: 271
Joined: Sun Feb 28, 2016 1:55 pm
Location: New castle, PA
Motorcycle: 86 GL1200 SEi, 78 Yamaha XS750SE, 86 Honda XL125, 4.5 HP belt drive Minibike my dad built, foot clutch!

Re: engine noise

Postby Rusty Bike » Sat May 28, 2016 7:18 pm

A vacuum leak could cause the idle issue also. A propane torch can be used to find vacuum leaks. Start bike engine. Turn on the propane but do not light torch. Put tip near suspected leak and see if engine RPM's increases. The engine will suck in the propane at a vacuum leak. Since the propane is a fuel, the engine will speed up.




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