K301 knocks
Hi Guys. I have this K301 (in another 125 I just acquired) and it has a knock at low idle, but when I give it full throttle the knock goes away, until it starts starts to pull like up a hill or pulling a load. I tore it down because I'm going to rebuild it. When I took it apart, the rear bearing, the one in the bearing plate, came off the crank just by pulling on it by hand (slid right off). The bearing also came out of the bearing plate fairly easy. It had .010 clearance between the bearing race and crank (should be in spec.). Question is, could the crank be slapping back and forth, creating the knocking? It's loudest on the PTO end of the engine. I had the crank miced and it is ok. Before I put money into it, I'd like to know what you guys think.
Thanks for any suggestions.
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