Roto Motor 70cc Twin V2 Gas Bought this motor New. Flew it 3-4 Flights. It is still not broke in. Includes both Roto Mufflers. I have 30 some planes and getting to old to take care of them all. Plus they are too BIG. Downsizing If I remember correctly the mufflers are $35 each or $70 for pair. Price for new engine is $689 plus $70 for mufflers. Save your self about $300. Far from even broke in yet.