For as long as I've had the chopper, I have always used 50w in her. Today I went to pick up a quart, and the place was out. But I did see 20w-50. The 50w has always been a decent oil for me at normal operating temperatures. The trouble comes later at night as I get off of work during non-summer months. The 50w always has that long warm up period after a thick, workout of a kick over. After a little research, I might give the 20w-50 a try.

UPDATE: So far the 20w-50 is working out fine. Thinner on cold starts and no noticeable difference at regular operating temperatures. Then again, it hasn't exactly been warm lately. In fact, it has been cold and wet. I reserve my final judgement on this experiment until July or August.