Only way to know for sure what is going on is to put a volt meter on the battery while you're running without the cluster and see what voltage you're...
Perhaps you missed his first post where he indicated the motor mount section of his lower crankcase was rotten and he already bought a replacement?
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Those screws taper from the head down pretty thin and can easily break. The threads don't start until lower in the hole. If it's running fine - leave...