Cam chain tensioner thingamajig clicking

[ToddS]

Hey GS Resources!

I can't tell you how awesome it was to find out there was a entire website dedicated to GSs. Anyways, I'm currently trying to ressurect a 1980 GS450 and I'm running into a funky problem.

The cam chain tensioner (I think that's what it's called) starts clicking and moving when the RPMs get above 2K or so. I lost my service manual a while ago so I'm kinda in the dark right now.

The thing I'm talking about is this:



If I hold it to the left, the clicking stops completely. Anyone know what might cause that?

[bwringer]

Here's a cam chain tensioner rebuild, with lots of pics so you can see how it works. Yours might look a wee bit different, but they all work the same.

http://bwringer.com/gs/camchaintens.html

Is the large spring under the knob still in place? I do know a guy recently rebuilt his 450's tensioner using these instructions and the noises he was hearing went away. YMMV, but the parts are cheap and it's worth a try.

Your part numbers for the seals and o-rings may or may not be different, but the rebuild instructions should be pretty much the same.

[pntrdave]

WillT gave me a cam chain tensioner at the Convention, he said sell it and donate the money to the JoJo fund. Anyone want it let me know. I think he said it was off an 850???????????????

[ToddS]

Awesome, I'm gonna give it a try as soon as I get home.

Thanks!

[ToddS]

So I rebuilt the cam chain tensioner last using those instructions and I'm still getting the same twisting jitter. What else can I try?

[ToddS]

It's fixed!!!

Hey guys,

I read in another thread that adding 1/2 to 1 extra turn to the tensioner might fix the problem and it did!!

Thanks guys.