Name that metal chunk...

[Chito]

So... my bike motor needed some work. With no money in the budget, I decided to throw in a spare motor I had. I didn't know anything about it, except someone wasn't such a good painter. Valves were gapped correctly and still are. I went on a test ride and things were going great, until I went to pass a car. I hit the gas and it slipped out of gear, causing it to rev hard. Then it started pinging. Found this on my exhaust valve spring. Seems like a chunk of aluminum? Any ideas what happened?

 

[Wingedwheel]

Did it smoke at all after this happened?

 

[Chito]

Nope. Still starts great. Pings/clangs though. Sounds like it did when I had an exhaust leak a couple of years ago. A little down on power.

 

[TwoManyXS1Bs]

See if this sounds familiar:

http://www.xs650.com/threads/help-head-question.19085/

 

[Chito]

Yeah. That seems about right.

 

[Chito]

It is from the intake side.

 

[TwoManyXS1Bs]

Yep.
Do I see an adjuster hiding back in there?

 

[650Skull]

I see the tappet adjuster and the area where the broken piece came from..............That rattle may be the nut cruising around the head

 

[Chito]

NoooOOooOooOoo! Funny I thought, that looks funny, oh there's where the chunk came from... then I forgot about it. Man. This bike has been killing me lately and I'm getting sloppy.

 

[timbeck]

Yup, 2M wins the hidden pieces contest............

 

[Chito]

Well, thanks for playing guys. I think I should probably check all the bolts on this motor. I checked the gaps, but it didn't occur to me to check to make sure the lock nut was tight. I've found a few missing parts and finger tight bolts too.

 

[MaxPete]

bummer.

Pete

 

[Wingedwheel]

How was that bike even running with the adjuster completely out like that?

 

[Chito]

Loud and down on power, but fine really. I'm pretty sure my bike is mostly held together by sheer will and a little bit of magic.

 

[bwthor]

Why isn't everything up inside there all oily? Did you clean it all up?

 

[xjwmx]

Name that metal chunk...

Harvey?