I found this on the internet about the tensioner problem. Looks pretty simple to me:
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I replaced the cam chain again, but instead of shelling out the cash for a new tensioner I went down to the hardware store and shelled out about 10 bucks for a small ball-joint ended turnbuckle that I put in its place.
That allowed me to hard set the tension on the camchain. I checked it after a couple thousand miles to allow for break-in on the chain. I readjusted it, closed things back up, and forgot about it. I never
had a problem with the engine after that.
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I'll be going to the hardware store to get one today.
FYI
Ike