Chito
XS650 Enthusiast
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?