I got a noise that I don't think is good?

[Newbee]

80 GS1000 has developed a "new" noise. Most noticeable at idle or when "lugging".

Nope it's not cam end walk it sounds more "metallic" and I think on #2 cylinder.

I am thinking wrist pin or maybe "piston slap" ?

I have 32K miles on it.

What might the problem be and can I keep riding it and wait for winter to tear down?

[tkent02]

Noise at idle???
Does the noise go away or change when you pull in the clutch? A clutch rattle is easily fixed, not really a problem anyway..

Also check if the noise changes when you pull one spark plug wire at a time off, this could indicate a bad rod bearing.
Not likely as these bearings last forever.

Are the valves adjusted correctly? A really loose one could sound like that.

Bad cam chain tensioners can make some funny noises.

[Guest]

Could be many things. Check the head first and maybe the starter clutch.
You think you have clearance issues with #2 piston on the valves? If so it will get louder and louder until BOOM!

[Newbee]

Trying to isolate the "noise"

Clutch action doesn't seem to make any change in noise.

How can I isolate the cylinder making the noise?

I am thinking that I will inspect valves (clearances) and go from there?

[BassCliff]

How can I isolate the cylinder making the noise?

Hi,

As was mentioned, just pull off one spark plug wire at a time. When a cylinder has no detonation there is much less stress on the piston and its associated rod bearing. If the noise goes away then you might suspect a rod bearing on that cylinder.


Thank you for your indulgence,

BassCliff