I was out today riding for less than 15 minutes when it died, just went dead as I let off the gas. Could not get it re-started, kicked and cranked...dead. I didn't have time to check for spark as I saw the left fork was leaking from it's seal, so I said Fug it...try tomorrow. I was thinking perhaps the woodruff key could have sheared; but I was not really hammering it, perhaps it was weak and just let-go? Anyone have a similar experience?