This new-to-me sled is throwing me a few curve balls thus far. I finally have it running half decent. It's got the correct belt in it but seems it easily rev to 9000 and a hair past before it bites in hard and the revs get pulled down a bit. Is that ok for this engine? Belt is not new, but isn't too far off the proper width. It's sitting just a hair under the edge of the secondary sheave. The primary was just rebuilt by a reputable shop be fore I got it, but let me tell you it sure rattles away when idling....(new post!)