Cylinder Salvage...

This 850 cylinder has been in my storage for many years.
A con rod broke and caused the damage.

Is there any salvage value/re-use?

That is an insignificant area of the cylinder and should be just fine for street use.

You can however see that there is an area there just hanging there, and some further cracking around the area. A UV dye crack test should probably be applied around there, to assess how far the cracks go - and all cracked ot loose material removed. And then asses if the skirt has enough area to work with.

Cylinder(s) probably have enough metal to be bored and sleeved back to be useable in any case - for road use anyway - don't consign them to the smelter just yet ?

P.S. What shape was the rod when it finished up, must have gone sideways a bit ?

Rohan said:

You can however see that there is an area there just hanging there, and some further cracking around the area. A UV dye crack test should probably be applied around there, to assess how far the cracks go - and all cracked ot loose material removed. And then asses if the skirt has enough area to work with.

Cylinder(s) probably have enough metal to be bored and sleeved back to be useable in any case - for road use anyway - don't consign them to the smelter just yet ?

P.S. What shape was the rod when it finished up, must have gone sideways a bit ?

Click to expand...

It would be easy to sleeve it. I have done lots of them like that. Using it the way it is will give you a noisy engine. Jim

I don't throw much away...

Here is the piston and con rod.

BOOM!

"It would be easy to sleeve it. I have done lots of them like that. Using it the way it is will give you a noisy engine. Jim" .....This is good to know because I have one just like yours Bob Z. And I don't throw much away either, which agonizes my wife to no end. Cj

My Trixie had similar damage after a rod cap bolt let go after corrosion worked its way through half the thickness following metal grain interface, cracked out to the machined notch base level. Was told no worry as rings don't go down that far and so far so goodie. I removed crumbs clinging on then lightly filed edges to a bevel is all. Look at the bores in photo to see the ring limit level and if fracture lines above that, then likely fine except for back of the mind pensiveness for few 1000 miles before forgetting about it.

I know I'd be pensive and with poor opinion to DPO to find fracture in a new bike acquired so vote resleeve now for better reputation on your name after you've passed - it on.

The broken rod photo is more evidence the Al rods are never the weak link as this one is broken at about their strongest section so something else quit first.

Here's what i found AFTER cylinder came back from light re-hone, AFTER the machinist left the shop for good. It was not found on disasembly if that matters to anyone else's parts handling concerns...