At the GIE Show in Charolette, the factory rep said it's same saw as 660 w/ smaller displacement, and lower price to 'fill' a hole between the 460-660.
MS650= 84.9cc, 4.8 kW, 16.3 lbs, 27.9 oz Fuel, 12.2 oz B&C, Pwr/Wt Ratio .294.
MS660= 91.6cc, 5.2 kW, 16.5 lbs, 27.9 oz Fuel, 12.2...