· FORUM GODFATHER.....R.I.P. PAT
You are probably hearing the straight cut primary gears until wind noise gets louder and the gear mesh gets enough force to stay in contact. The 2012 model has scissors type primary gears to keep the noise down. Timing is not adjustable. There is no such thing as a conventional tune up as there are no points, no timing adjustments and no carburetors to adjust.