YS Engines
120SR
HELI 2-Stroke Engine • Same mounting as the YS91 making it easy to add more power to the existing helicopter • Proven factory preset regulator for a consistent, reliable...
91SR-3DS
HELI 2-Stroke Engine NEW Larger cylinder head for better cooling and performance NEW Steel lined backplate to minimize drag resulting in better performance and increased horsepower NEW Piston & Sleeve design increasing...
56SR
HELI 2-Stroke Engine Bigger cylinder head for better cooling Three needle carburetor for a more accurate adjustments Proven fuel injection system for a more consistent run Same mounting as the...
