Serious Metal Chunks in Oil Pan

[londonboards]

(This is a copy of a post put in my resto thread - see signature)

With the damage I have already seen to the top end of this motor, it was suggested that I remove the sump / oil pan and see what what is there. Shocking. But with a caveat. I have checked the clutch and pistons and they are all peachy (good). In fact the pistons are hardly scored at all.

I am thinking (praying) that this might be the residue of a previous engine failure. OR where else could these chunks have come from? We are talking serious bits of metal here:

(for the whole picture set see my blog here: GS1150 Metal Chunks)





The bigger pieces (aluminium):





Smaller pieces are steel:



All of the smaller pieces have this grooving on them:





Clutch and pistons are good:





Help!!!

Greetings

[tkent02]

Those steel pieces look like cylinder sleeves. If yours are still there on one piece it's from a previous catastrophe. Still you should split the cases to clean everything and check for other damage.

I don't recognise the bigger pieces.

[Steve]

The pieces in the fourth picture appear to be from the clutch basket.

.

[londonboards]

tkent02 - I went and checked and you are correct on the basis of the curve of the steel pieces and the striped markings and the chamfer on the base. The only thing that doesn't add up is that the pieces I found in the engine are 1.75 mm thick and my liners are 3.25 mm thick.







Greetings

[londonboards]

Steve - I took another picture to show the striations on the surface. It does look very much like the outer clutch hub finish:



Clutch in there now is now looking great. It didn't come from the current one. How often do these things blow?

So at some time this bike had a complete clutch failure and some sort of event that destroyed the lower cylinder liners.

Looks like a complete strip down?

Greetings

[Guest]

Could be possible the PO scattered the clutch/motor and when they resleeved it they went with a thicker sleeve, dropped the cc displacement some. They didn't bother taking the oil pan off to check for pieces or to clean it. Could be the reason why the pistons and the clutch look as good as they do they are new? I don't know, folks do some strange sh$t at times.

[Agemax]

possibly the bike previously had big bore pistons, with much thinner cylinder sleeves.
looks like it lunched itself big time and the owner simply plonked on a different top end just to get the engine running again.
Full strip down required......

[londonboards]

Agemax - I thought you might say that. Darn it. I don't have the money for this one. The gaskets alone are going to cost a couple of ?100. Then there is all the work that needs doing on the head - say ?350. I think I will wrap this one up until I win the pools!

Greetings

[tkent02]

Opening up the cases won't cost anything but time, unless you find more damage. No gaskets in there.

[Nessism]

Mercy sakes alive! What's next?

Hope your luck breaks soon. Just focus how nice it's going to be when you get everything squared away!

[dorkburger]

Richard, this thread has become a heartbreaker..like Ed said, I hope things turn around.
Good luck

[londonboards]

Well I took the gamble of buying an imported bike unseen. I figured for the money even if the motor was shot I should be able to break even on it.

Now, since I have invested some cash and quite a bit of time in it, I will finish the job. Can't bear to see it trashed. It's going to cost a pretty penny and I have other restos in progress too. But eventually, yes it will be a sweet motor again. I think I will invest in a top end oiler mod too!

Greetings

[tatu]

You've got two threads running here on this subject,
The APE bolt suggests that perhaps it has had some tuning and go fast bits, in it's past, the thin cylinder lining pieces might mean that at some time in its past its been seriously bored out and had a catastrophic failure but been rebuilt.

[Carter Turk]

LB, we have similar pieces in our engines, but the aluminum chunks are larger in your discovery. Those cylinder liner pieces look about the same thickness as what happened to mine.

[londonboards]

tatu - now on closer inspection I can see that cylinder liners, pistons and all the clutch look shiny new. So I am thinking that a load of money and effort has already but put into this engine quite recently. If I can fix the head and cams, strip and rebuild it, then I would have a tip top motor. Do you concur?

I would love you to take a peek at it next time you come to Robinsons.

Greetings