Topic: what's left of a cb500t piston left side

[jamesb]

bought this bike the other day just wanted the tank and wheels gave the rest to my son he noticed a bunch of ground up shavings comming out of the exhaust manifold we took the engine apart and look what we found this is whats left of the piston

[Steve_K]

Internal weight reduction?  Lean carb?  Are you planning to rebuild lt?
I wonder how hot it got in there.  The parts look melted.  Good luck with the build.
Steve

[FuZZie]

That's all of it?

[jamesb]

that's all of it you ought to see the lifter the big mystery is how long did it run when all this came about the lifter got extremely hot and i mean hot.it had the whitish red color that metal gets when it has been sitting in a fire.

[FuZZie]

Then that is worst damage to a piston I've ever seen.

[Hondawggie]

Looks as bad as a 2-stroke with an air leak!  Someone did that motor wrong shame on 'em.

Here's a profile of the perp:
- 16 to 19 year-old
- "oil?  oh yeah, oil..."
- "it goes faster when I get that needle past the redline there"
- "it's a loaner, it's my buddy's bike he asked me to watch it and he left the key in it he won't notice"

[faux fiddy]

Ahh, catastrophic existence failure with vulcanism.