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I know there are a few topics about knocking noises, and I have looked through them lightly but nothing stood out too great.
My gs seems to have adopted a knocking type noise, similar to the sound that a 4 cylinder Toyota has with rod knock. It doesnt sound at idle(the tapping noise I asked about a few months ago is still there) but under load around 3-5k rpms it knocks pretty loud. It doesnt do it if I am in neutral or with the clutch pulled and rev it up like the Toyota does though.
In my search I saw that some GS's have a roller-bearing set up that makes rod knock theoretically impossible.
I talked to my friend, [diesel]master tech, the other day and had him look at it and he said it sounds like a loud electrical popping and suggested the ignitor was arcing. I was under the impression that it doesnt work like that.
I recently had my headers off to replace those gaskets and saw that cyl1 was running very lean and 2+3 were rich and 4 was somewhere in between.
EDIT::Almost forgot, I changed the 15 year old stale oil out about 700 miles ago with a brand new EMGO filter. I used the Rotella Synthetic T6--5W-40::
once again, the bike is a 1981 GS650GX. Which of these would be most likely, or is there an even more likely culprit? I dont really wasnt to start taking things apart right now chasing a ghost.
My gs seems to have adopted a knocking type noise, similar to the sound that a 4 cylinder Toyota has with rod knock. It doesnt sound at idle(the tapping noise I asked about a few months ago is still there) but under load around 3-5k rpms it knocks pretty loud. It doesnt do it if I am in neutral or with the clutch pulled and rev it up like the Toyota does though.
In my search I saw that some GS's have a roller-bearing set up that makes rod knock theoretically impossible.
I talked to my friend, [diesel]master tech, the other day and had him look at it and he said it sounds like a loud electrical popping and suggested the ignitor was arcing. I was under the impression that it doesnt work like that.
I recently had my headers off to replace those gaskets and saw that cyl1 was running very lean and 2+3 were rich and 4 was somewhere in between.
EDIT::Almost forgot, I changed the 15 year old stale oil out about 700 miles ago with a brand new EMGO filter. I used the Rotella Synthetic T6--5W-40::
once again, the bike is a 1981 GS650GX. Which of these would be most likely, or is there an even more likely culprit? I dont really wasnt to start taking things apart right now chasing a ghost.
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