Yes, the bit next to the penny is magnetic; it was attached to the rest of the particles on the drain plug to the right in the image but I separated it to take a size comparison photo. could be a section of a piston ring?? there are many tiny bits of copper/bronze (not sure which metal for sure) that show up on the blue paper rag in the photo, these non-magnetic bits had settled at the bottom of each drain plug ("bottom" meaning where the threaded portion meets the head)The chunk next to the penny ...... is it magnetic? It looks like copper in the pic.
First step: a compression test.
Slick
could be,,,i'm going to try to trace the bit and extend the curve to full circle to find the diameter, thank you for your responsePiston circlip?
Thank you Slick for your response, very little of my riding was/is done hot, no excessive idling either, generally first or second kicks to start, put on my jacket and head gear, and off I go. I'll work on getting the compression test done this weekend, thanks again for your input/insightI first thought it to be a piece of a ring, but the color contradicted that. Being magnetic, it is likely piece of a ring.
Have you been running hot, or idling long on a very hot day prior to the symptoms you described as misfiring occurred?
I am thinking seized piston, the brass or bronze stuff you see being the expander ring.
A compression check should be definitive.
Report back.
Slick
thank you SirYeah, circlip seems most likely I’d have thought.
Whilst that’s bad news cos it means a top end rebuild... IF you’re lucky and IF you caught it in time, you may get away with the bottom end being OK.
Fingers crossed for you.
I'm guessing at least part of the motor will be getting refreshed, could be worse,,,it could have happened much farther away from home,,,and where I live cell phone reception is spotty at best,,,so I was able to get it back here pretty much straight awayI have to say if I saw that lot I would strip the motor straight away
Thank you, messengers don't get shot by me. I would rather hear as much info/input as possible instead of the other way around,I first thought it to be a piece of a ring, but the color contradicted that. Being magnetic, it is likely piece of a ring.
Have you been running hot, or idling long on a very hot day prior to the symptoms you described as misfiring occurred?
I am thinking seized piston, the brass or bronze stuff you see being the expander ring.
A compression check should be definitive.
Report back.
Slick
Update: just read Deets55 post which came in while I was writing this .... I think he has nailed it as a piece of circlip.
The rest of the magnetic debris might be the result of the gudgeon (wrist) pin gouging the cylinder wall.
Sorry .... don't shoot the messengers. Keep us posted.