So the other day my 400 died on me. Took it back home to find out choke was stuck. Fixed that for good now then tried firing it up. Wanted to but wouldn't, so I took the valve cover off noticed my timing jumped. Set everything back to spec and hand cranked it. Everything seemed fine. Cranked it from starter without spark plug boot and again, everything seemed fine. Put it all back together and it fired up, made a nasty noise , then died. Starter could crank but motor wouldn't. The piston moves up and down but the cams won't rotate. Also noticed play in the piston and a lot of carbon build up on my valves. I'm thinking it has something to do with those gears by the clutch, maybe the cam sprocket? Any input would be appreciated.
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