Yes clean the starter.
Also might be the oil you are using. Too thick and the sprag clutch won't engage. Delo15w40 or Rotella 15w40 is what a lot of members use.
You could also flush the crankcase with a qt of marvel mystery oil for a 200 mile easy rpms ride, go home and change oil and filter while hot to flush out grime in cases and pickup screens.
Also might be the oil you are using. Too thick and the sprag clutch won't engage. Delo15w40 or Rotella 15w40 is what a lot of members use.
You could also flush the crankcase with a qt of marvel mystery oil for a 200 mile easy rpms ride, go home and change oil and filter while hot to flush out grime in cases and pickup screens.