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Simon, I don't remember the exact break-in process other than the 1 hour puttering around part, but I do remember that dealer/mechanic I bought it from was adamant that Yamaha four-strokes are better off when run hard during the break-in. I have subsequently seen mention of problems with rings not seating when the motors were babied. So follow the manual, for sure, but once you get past the required slow speed running, let 'er rip!

Tim