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Phil, thanks for watching my back.
Not only is the cam retainer flat, it looks to be brand new, not a mark from either the cam gear or the cam shaft on either side.
Yes, I removed the oiler nozzle, blasted it with carb cleaner to make sure it was clear, reinstalled (I'd marked the flat top with an arrow to indicate the orifice opening) with the hole towards the gear junction...been reading this site for a while...and the way the gear cover fits, there doesn't seem to be much choice in getting the thing pointed in the correct direction.
I'm thinking I've got a piston slap or an almost used up wrist pin bushing.
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