Midnite
Cruisin' Guzzisti
Very interesting. Thanks for posting, Kev. This explains the Piaggio rep's rebuttal of my characterization of the problem (missing thrust washers), and syncs up more with the description that I got from the service manager who just replaced my V7ii engine (he described is as a "crankshaft problem" that Piaggio is aware of).He explained and showed me that it was not that thrust washers were not installed, but that the crankshafts themselves were machined out of spec (undersized) badly enough that the thrust washers could move out of position, blocking the oil passage and causing catastrophic wear on the washer. This rapidly allowed additional lateral play which caused the clutch to keep going out of adjustment since the whole crankshaft was basically migrating backwards in the block as the washer or even block itself (if the washer fell completely out of place) was ground away.
Still wondering what you all think about the safety of running the 'factory fill' 10-50 Castrol as I noted above... safe for the first 600 miles, or should I dump it and replace with 10-60 for break-in? Does it matter?