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Yes thanks Dave for the reply, when I opened it up The keyway was missing, Looks like a Idiot put a rivet in near the damaged case to try and keep the guide in place. The lower guide fell out and wont stay on...I probably have to find a good left side engine case for it to function! The person I bought it from said he rebuilt the top end but now I'm afraid to open it up! YIKES!!!

While you're in there I'd change that timing sprocket too. It's showing a fair bit of wear .. Yes, you want those guides in place to keep the chain from jumping on the sprocket and throwing the valve timing out. I don't know about that motor but on some motors if the valve timing is out or the chain is broken the piston can hit the valves.. and good bye motor. Was the keyway in the crankshaft damaged? You could be looking at some major repairs to the motor with a new crankshaft in the works if the keyway is slopped out .