seized

Very strange failure on my hyper. It's got 58000 miles and I've had it since New. Always changed oil at 4k or less always at proper level. The cam ground and seized in its guide and ended up ripping the belt apart. Somehow it seized in the right spot and didn't bend valves.my question is why...

Just suited up and hopped on the bike to go for a ride. First, I noticed as I was pushing it to the spot I fire it up at, it felt heavier than usual. But I just assumed I got weaker. LOL! Then as I took my first slow-speed turn, it was pulling heavily in the direction of the turn. I knew that...