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Old 10-23-2007, 09:06 PM   #1
myblubeemer OP
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Clutch Noise at idle on R80G/S?

I am new to the world of Airheads having recently purchased a '81 and '86 R80G/S. On the '86 (which recently had a rebuilt trans and spline lube) there's a disconcerting noise from the clutch at idle. Pull the clutch lever in and the noise goes away. It also seems to go away with higher revs. I have heard that a lot of airheads do this but my '81 sure doesn't.

Any idea on what causes this? Is it doing harm?

Thanks in advance for your thoughts on the subject.

jwat
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Old 10-23-2007, 09:10 PM   #2
Boon Booni
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What kind of noise is it?

My R90/6 will sometimes make a knock sound at idle with the clutch out. Just a touch of pressure on the lever will make it go away. I'm pretty sure it's the push rod moving inside the input shaft.
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Old 10-23-2007, 09:13 PM   #3
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Quote:
Originally Posted by Gramps
What kind of noise is it?

My R90/6 will sometimes make a knock sound at idle with the clutch out. Just a touch of pressure on the lever will make it go away. I'm pretty sure it's the push rod moving inside the input shaft.
Sound like the same noise....knocking sound that goes away with pressure....Any idea how to prevent it?
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Old 10-23-2007, 09:23 PM   #4
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Quote:
Originally Posted by myblubeemer
Sound like the same noise....knocking sound that goes away with pressure....Any idea how to prevent it?

You can adjust it out a bit by removing some of the clutch cable slack. Just don't over do it, you still need some slack in the cable, but not an excessive amount. If you take out too much/all the slack, the clutch will likely start to slip, and you will wear out the throw out bearing quickly.

Mine still does it on occasion, but not at every stop like it used to
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Old 10-24-2007, 12:27 AM   #5
Wirespokes
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Sounds like something wrong with the throw out bearing. A bunch of slack in the cable shouldn't cause noises.
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Old 10-24-2007, 06:32 AM   #6
TEXASYETI
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Hmmmm...

Joel,

All of my airheads - R100's to this point - made a noise tha seems similar to what you are discussing. I was told it was the throw out bearing and that it is normal. Now your noise could obviously be something different but it sounds right.

Mine sounds like a tractor.

Oh, I know I talked about coming over to check out your bikes this week but had forgotten that I am going to San Fran tomorrow. PAcking and other crap is going to push it to next week.

One day though...
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Old 10-24-2007, 06:41 AM   #7
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I'd take the throw out bearing stuff apart and see how it looks, and repair, replace and grease as needed. Only takes less than a half hour and you'll know what's what. Article here,
http://www.cdegroot.com/cgi-bin/mirr...esthrowout.htm
Then a proper clutch adjustment as per the factory manual and you should be in business.
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Old 10-24-2007, 06:50 AM   #8
myblubeemer OP
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Quote:
Originally Posted by jtwind
I'd take the throw out bearing stuff apart and see how it looks, and repair, replace and grease as needed. Only takes less than a half hour and you'll know what's what. Article here,
http://www.cdegroot.com/cgi-bin/mirr...esthrowout.htm
Then a proper clutch adjustment as per the factory manual and you should be in business.
Very Hepful! Thanks!
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Old 10-24-2007, 08:48 AM   #9
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maybe normal

My 88GSPD makes the same rattle/slight knock noise. Always has for the last 6k miles anyway.

I was told by a fellow BMW guy that this is because its a dry clutch and its normal.

My mechanic n'er mentioned it so I deem it as normal.

Any screeching scraping noises should be checked out sooner [past bike experience].
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Old 10-24-2007, 09:25 AM   #10
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Felt could be worn out?
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Old 10-24-2007, 01:38 PM   #11
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Quote:
Originally Posted by hogmolly
Felt could be worn out?

if the felt was worn out, it'd be leaking tranny oil into the clutch..
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Old 10-24-2007, 02:27 PM   #12
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Quote:
Originally Posted by Gramps
if the felt was worn out, it'd be leaking tranny oil into the clutch..
There is a seperate seal for that.
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Old 10-24-2007, 02:56 PM   #13
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Quote:
Originally Posted by myblubeemer
I am new to the world of Airheads having recently purchased a '81 and '86 R80G/S.
Congrats on the new bikes. I agree with the guys who say throw out bearing. Don't know beans about your new rides, but I'm guessing they didn't see much use for a while before you bought them. They're old! Personally, I wouldn't ride them without pulling apart and lubing or replacing every bearing and many seals, short of the crank. If they've sat for a long while or been negected, you are nearly certain to have one issue after another unless you bite it big, which is in the long run much easier and cheaper than dealing with all the little crap as it comes up. Bonus....you'll learn a lot, and it's not hard.
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Old 10-24-2007, 03:21 PM   #14
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Big noise, little noise, noise noise noise

Its impossible to gauge the noise in a text message but my '84 has made noise at idle with the clutch lever out for 23 years now and I feel I can say with absolute certainty that there is nothing wrong with it. Is it a big noise? Maybe, who can tell? Is my big noise the same as yours? who knows. All I can say is that every air head I have ever heard made some amount of clutch noise sitting with the lever out which goes away when you pull the lever in. YMMV.

Oh, BTW, my '84 runs better now than ever, it just seems to get better every year.
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Old 10-24-2007, 03:30 PM   #15
Boon Booni
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Quote:
Originally Posted by hogmolly
There is a seperate seal for that.

Is that something on the newer bikes? I know my R90 doesn't have it, but things must change in 33 years..
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