Mine feels like I’m riding a gag hand buzzer over 8k rpm and has a hard time up shifting over that as well. 1100 miles. Been doing it since I bought used with 767 miles. Everything is tight. Runs perfect below 8k.
I think I have the same issue. Hard to tell, though - in that I kept the revs below 7200 while the engine was green. Now with 1100 miles on it, I'm winding it up - and I'm feeling buzzes I never felt before.
I was impressed, when it was new, how smooth it was for a single.
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