Anyone could tell me the initial needles set up in the dl-50?.

After four hours breaking in I'm getting only 6500 rpm with a Menz 22x10 when other guys in identical conditions got 6900-7200 rpm.

My H needle is 1 1/2 turns and L is 1 1/4 turns, which was my initial set up. I played the H 1/8 back and for without any improving in top rpm.

Should I check the ignition timing ?

Should I go flying to get more breaking in time?