engine noise and viberation


Information and questions on GL1000 Goldwings (1975-1979)
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1982ghost
Posts: 14
Joined: Fri Jun 24, 2011 1:52 am
Location: houtson
Motorcycle: 1976 GL1000 and 1982 GL1100A Aspencade

engine noise and viberation

Postby 1982ghost » Thu Jul 07, 2011 3:05 am



I have a 1976 gl 1000 pulled carbs and cleaned the jets bowls and bodies with carb dip bike hade been sitting for about 6 years started it up ran ok i adjusted the carbs then I heard a rattling noise at times at idle sounded like it might be coming from the timing belt idler pulley then it sounded like it was coming from in side the crank case I pulled the clutch and the noise went away some what . But I also noticed that when I pulled the clutch the bike also ran smoother could the noise be bearings or the clutch making the noise and vibration WAYNE


WAYNE GREETINGS FROM HOUSTON TEXAS

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virgilmobile
Posts: 7653
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 and viberation

Postby virgilmobile » Thu Jul 07, 2011 9:28 am

My 76 1000 had a "clutch bucket rattle" from the day I got it until I sold it some 70k miles and 12 years later.There is a mod for that ,but I never bothered.
Rough idle is usually tied to exact carb sync and adjustments.The next thing is precise ignition timing.A bit finicky,but get it right and it quiets down a bunch.
The clutch rattle...annoying but not detrimental.

1982ghost
Posts: 14
Joined: Fri Jun 24, 2011 1:52 am
Location: houtson
Motorcycle: 1976 GL1000 and 1982 GL1100A Aspencade

Re: engine noise and viberation

Postby 1982ghost » Thu Jul 07, 2011 6:53 pm

most of the roughness goes away when you engage the clutch but the rattle sorta stays intermittent like a roller bearing rattle
WAYNE GREETINGS FROM HOUSTON TEXAS

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virgilmobile
Posts: 7653
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 and viberation

Postby virgilmobile » Fri Jul 08, 2011 8:08 am

Questions and comments...

"most of the roughness goes away when you engage the clutch"
Engage the clutch,meaning it's in neutral with the clutch lever pulled in?
Roughness,meaning engine vibration,sitting still with the clutch lever pulled in ready to put it in gear?

The rattle can still be the clutch assembly.Even intermittent.It kinda floats on the shafts,and (in my opinion)was a bit poorly designed,thus the modification.

Get a stethoscope from Harbor Freight,their cheep,Use it to probe around and pinpoint the noise source.
I read about one guy with a bad rattle,and found a part missing in the clutch assembly.

If the rattle is coming from the back alternator area,take the 17mm plug off at the left rear of the engine on the alternator housing. Check the bolt you find inside there to make sure it is tight. Takes a 12mm wrench. If that bolt is loose the rotor will rattle on its shaft at idle.

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dingdong
Posts: 2863
Joined: Thu Apr 08, 2010 8:35 am
Location: Oklahoma City
Motorcycle: 1976 gl1000
1993 gl1500
2004 NRX1800 Rune

Re: engine noise and viberation

Postby dingdong » Fri Jul 08, 2011 8:57 am

All of these older Wings rattle when the bike isn't in perfect tune. Usually a good carb synch will solve the problem. Could also be the ignition at fault. What you are hearing is the primary chain slopping around because the cylinders aren't running evenly.
Tom

A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.

1982ghost
Posts: 14
Joined: Fri Jun 24, 2011 1:52 am
Location: houtson
Motorcycle: 1976 GL1000 and 1982 GL1100A Aspencade

Re: engine noise and viberation

Postby 1982ghost » Thu Jul 14, 2011 5:31 am

Thanks for the in put definitely think it is a tuning issue the bike has been up graded to a Dyna ignition system and timing was never adjusted was in process of setting the timing when the front two cylinders quit firing # 1&2 checked the coil the coil works great checked the pickup coil for those cylinders and no spark and no pulse to the coil and found who ever installed the system hooked the condensers for the points up to the pickup coils am thinking one of them went out and fried the pickup coil for the front cylinders but bike was running great and the rattle totally went away after getting timing close to perfect so it was a timing issue again thanks from (SPACE CITY) ('' HOUSTON'' TEXAS ) (THE FIRST CITY) (NAME) (HEARD FROM THE MOON)!!!!!!!
''HOUSTON TRANQUILITY BASE THE EAGLE HAS LANDED''
WAYNE GREETINGS FROM HOUSTON TEXAS

skaluf
Posts: 3
Joined: Tue Jun 21, 2011 10:20 am
Location: Sadorus, IL
Motorcycle: GL1000

Re: engine noise and viberation

Postby skaluf » Fri Aug 05, 2011 1:12 pm

I have a similar problem with my '77. It rattles right about 3300 regardless of being loaded or not. I've heard primary chain, clutch, poor sync of carbs. The rattle goes away below 3300 and above it. There may be some at idle, but it's a bit hard to tell.

Any ideas?

Steve

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Fewman
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Joined: Wed Sep 29, 2010 7:57 pm
Location: Drake, CO
Motorcycle: '75 GL1000

Re: engine noise and viberation

Postby Fewman » Fri Feb 03, 2012 4:51 pm

If you pull the clutch lever at idle (in neutral) and the noise goes away, it is primary chain "slap".

If you properly sync the carbs (all other tuning completed first), you will confirm a good sync by no longer hearing this noise...




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