GS1000E Knocking in topend

[Martin Winterburn]

First as a new member - Hi everybody - I've had a 1980 GS1000E for about 4 years now and theres about 61000 miles on the clock. Last year I took the head and block off to fix oil leaks, had them both skimmed to clean head gasket joint faces up, glaze busted bores and re assembled, everthing OK till this weekend. At tickover every 15 to 20 seconds there is a loud knockin from the top end for about 5 seconds that dissapears when the motor is revved. I haved removed checked and reset camchain adjuster - it seems to adjust towards the end of its travel so perhaps a new chain is required - I was worried a valve was trying to mate with a piston but all the compressions are similar (around 110psi) and on the road it pulls like a train and sounds glorious. Any body any ideas.8-[

[chiphead]

Check your carb sync.

[Steve]

Martin,
I will be watching this thread, too, as my wife's '82 850L does the same thing. Does not happen when first started (cold), but will do it after it warms a bit.

Chiphead,
Carb sync is as perfect as my mercury gauges will get it.

I have been curious about it, but evidently it is not too much of a problem. We have put about 10,000 miles on it over the last two years and it is still running strong. \\/

[tomcat24551]

You have probably got cam endfloat where the thrust rings on the cams hit against the cam bearing caps. My '79 850 has the problem big-time!

49er has come up with a fix for this and in a few weeks he will probably post a how-to feature on this website, I think.

You can see a rough description of what he did to cure his problem on this thread:

http://www.thegsresources.com/_forum...d.php?t=103699

A couple of preliminary pictures are here, in the 2nd and 3rd pictures:

http://www.thegsresources.com/_forum...d.php?t=104446

I think he's nailed it!

Tomcat

[49er]

You have probably got cam endfloat where the thrust rings on the cams hit against the cam bearing caps. My '79 850 has the problem big-time!

49er has come up with a fix for this and in a few weeks he will probably post a how-to feature on this website, I think.

You can see a rough description of what he did to cure his problem on this thread:

http://www.thegsresources.com/_forum/showthread.php?t=103699

A couple of preliminary pictures are here, in the 2nd and 3rd pictures:

http://www.thegsresources.com/_forum/showthread.php?t=104446

I think he's nailed it!

Tomcat

Tomcat

I have just returned from a week's vacation in Rarotonga. Some people get all the bad breaks!!

I plan to start on the "end float cure stickey" this coming week. The new digital pics are a big impovement on those early pics.

Cheers

[tomcat24551]

I have just returned from a week's vacation in Rarotonga. Some people get all the bad breaks!!

Yes, you'll really need to do a better job of planning in the future. So sad!

http://www.ck/geog.htm

Looking forward to the cam fix.

Tomcat