Identify this foreign material

So, pulled the head and barrels off the 1000 ST because I knew there was something wrong inside. I'd seen some red material coming out in the oil and it always sounded terrible + smoked, etc etc. Barrels and pistons looked good, valves looked a little fishy but generally okay. Pulled off the oil pan and was thankful that I'm not going crazy and didn't pull it all apart for no reason :laugh:

Not sure what this is. Clutch plate? Starter clutch maybe(I haven't checked it but the starter was working so I doubt it)?
Suggestions anyone?

It won't be starter clutch. That's just some rollers and springs.

Looks like friction plate shavings and a dab of silicone sealer.

Was the oil filter intact? The "orange" debris looks like someone got carried away with the gasket sealant.

Not to make light of your problem but...

OH NO! NOT ANOTHER "ORANGE" FILTER! :blink:

This is way out of my expertise, but I found some stuff that looked similar to that under the stator cover of my 1000. It was the glue they used to affix the magnets to the rotor. With the volume you show in the pics I doubt that's what it is. I don't think pieces that large could make it into the oil pan. Is it hard or pliable?

Vter Bob wrote:

Not to make light of your problem but...

OH NO! NOT ANOTHER "ORANGE" FILTER! :blink:

This is way out of my expertise, but I found some stuff that looked similar to that under the stator cover of my 1000. It was the glue they used to affix the magnets to the rotor. With the volume you show in the pics I doubt that's what it is. I don't think pieces that large could make it into the oil pan. Is it hard or pliable?

Oh yea...you could well be right.

I took a second and better look at the pics. The piece on the glove looks like silicone at quick glance but when you go back up and look at the other pics, it does look a lot like the epoxy sealer used on the rotor magnets. The ST would have that type of rotor....

For peace of mind(If it were me) I'd drop the alternator cover and inspect the stator and rotor for any loss of adhesive.

I doubt it is silicone, forgot to mention that it is very hard. That's why I figured it might be clutch plates. There was no sign of it in the barrels or on the pistons and just from a quick glance there doesn't seem to be much up inside the cases but the motor hasnt run for about a year so it may well have just had time to drop down

Edit:
and the oil filter appeared to be intact, don't think it is filter debris especially because it is so hard

KZ250LTD wrote:

I doubt it is silicone, forgot to mention that it is very hard. That's why I figured it might be clutch plates. There was no sign of it in the barrels or on the pistons and just from a quick glance there doesn't seem to be much up inside the cases but the motor hasnt run for about a year so it may well have just had time to drop down

Edit:
and the oil filter appeared to be intact, don't think it is filter debris especially because it is so hard

It's most likely the epoxy from the edge of the rotor magnets then. Yank the cover.

Well now, look at that. You guys were right, nice job



I'll strip the rest off and once its back together run it and flush the oil a couple of times before any serious riding (it'll be awhile, this is just a side project). Does the epoxy need to be there? Should I replace it?

I'd try to remove as much lose material as possible because more can possibly come off.This may make the rotor unbalanced causing more problems in the future.

The trouble I see with using another adhesive would be in balancing it evenly. You might have to have the rotor re-glued. I wonder if a motor rebuilding shop could vacuum impregnate the magnets in a furnace(of course magnets and high temperature dont mix well).

Hmm... so the rotor wouldn't be balanced as is without the adhesive? What would the possible consequences of running it w/out the epoxy be?

Identify this foreign material

It looks Irish to me......