My initial thoughts were cam tensioner, but it seems to be functioning fine? So now I'm wondering if the valve shims clearance isn't sufficient? I know they are close to being too tight, but before I order new shims, would that explain the clacking noise?
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Quick Question - Valve Shims & Noise
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Quick Question - Valve Shims & Noise
Last fall, when I started my project bike for the first time, there was a clacking noise coming from the top end somewhere, and after running it a few times, the noise quieted slightly but never disappeared. I torn down he top end this winter and everything looked good, well within spec, but when I started it this spring the noise is still there?
My initial thoughts were cam tensioner, but it seems to be functioning fine? So now I'm wondering if the valve shims clearance isn't sufficient? I know they are close to being too tight, but before I order new shims, would that explain the clacking noise?1982 GS650e - Cafe or Scrambler...that is the question...Tags: None
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Originally posted by KillerGriller View PostLast fall, when I started my project bike for the first time, there was a clacking noise coming from the top end somewhere, and after running it a few times, the noise quieted slightly but never disappeared. I torn down he top end this winter and everything looked good, well within spec, but when I started it this spring the noise is still there?
My initial thoughts were cam tensioner, but it seems to be functioning fine? So now I'm wondering if the valve shims clearance isn't sufficient? I know they are close to being too tight, but before I order new shims, would that explain the clacking noise?1980 Yamaha XS1100G (Current bike)
1982 GS450txz (former bike)
LONG list of previous bikes not listed here.
I identify as a man but according to the label on a box of Stauffers Baked Lasagne I'm actually a family of four
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Originally posted by LAB3 View PostBy all means take the time to get the right shims in place. The common reason why you'll still get noise is from a condition known as "Cam Walk" and is a well known issue caused by plain old ordinary wear. If you do a search you'll find plenty of info on this site on the subject, it's considered to be "normal"1982 GS650e - Cafe or Scrambler...that is the question...
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And honestly it isn’t much to worry aboutCowboy Up or Quit. - Run Free Lou and Rest in Peace
1981 GS550T - My First
1981 GS550L - My Eldest Daughter's - Now Sold
2007 GSF1250SA Bandit - My touring bike
Sit tall in the saddle Hold your head up high
Keep your eyes fixed where the trail meets the sky and live like you ain't afraid to die
and don't be scared, just enjoy your ride - Chris Ledoux, "The Ride"
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Originally posted by KillerGriller View PostMy initial thoughts were cam tensioner, but it seems to be functioning fine? So now I'm wondering if the valve shims clearance isn't sufficient? I know they are close to being too tight, but before I order new shims, would that explain the clacking noise?
Well, at least until the valves burnt, then there would be a LOT of noise, if the engine even ran at all.
What makes you think the tensioner "seems to be functioning fine"?
You can't see it in operation, you can only see the results if it's NOT functioning fine.If you're not living on the edge, you're taking up too much space.
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Originally posted by Who Dat? View PostIf the valve clearance is not sufficient, there would be LESS noise, not more.
Well, at least until the valves burnt, then there would be a LOT of noise, if the engine even ran at all.
What makes you think the tensioner "seems to be functioning fine"?
You can't see it in operation, you can only see the results if it's NOT functioning fine.
"Cam Tensioner seems to be functioning fine" is based on it's behavior during reassembly and when I had to adjust the cams to line them up for timing. It may be misbehaving, if a clacking sound is typical of a malfunctioning tensioner it'd make sense. I'll check it again tonight when I have the cover off.
Also, this isn't the typical ticking of an older engine, it's a separate/distinct "clack-clack-clack" sound at the same time, the bike sounds like a tractor.Last edited by KillerGriller; 05-27-2021, 04:59 PM.1982 GS650e - Cafe or Scrambler...that is the question...
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If the cam chain was too loose, it could slap against the cam cover. Best way to ensure that tensioner is working properly is to remove it and fiddle with it in your hands- you’ll quickly figure it out as how the lock screw and lock nut are designed to work. The tensioner plunger shaft must be able to slide out,but not push back .1981 gs650L
"We are all born ignorant, but you have to work hard to stay stupid" Ben Franklin
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Originally posted by KillerGriller View PostCheers, I'll look into it
I haven't noticed it on my 850 which has 52K miles on it. I wonder if it only becomes an issue on some engines and not others.
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Originally posted by Burque73 View Post
I haven't noticed it on my 850 which has 52K miles on it. I wonder if it only becomes an issue on some engines and not others.
Today, it started doing it as soon as it ran.
Ach, who knows why - it's one of those things.
Just thought of something - the previous slack time it was on the sidestand for a fortnight. Normally, it's on the centre stand.---- Dave
Only a dog knows why a motorcyclist sticks his head out of a car window
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Originally posted by Grimly View PostMy 80 engine only does it when warm and only sometimes at that.
Today, it started doing it as soon as it ran.
Ach, who knows why - it's one of those things.
Just thought of something - the previous slack time it was on the sidestand for a fortnight. Normally, it's on the centre stand.
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