YS 120 SR

Same mounting as the YS91 making it easy to add more power to the existing helicopter
Proven factory preset regulator for a consistent, reliable operation
Steel lined back plate to minimize drag resulting in increased horsepower
Larger cylinder head for better cooling YS120SR

Muffler for this engine is the Hatori 2123

Specs:
Bore: 30.38MM
Stroke: 27.5MM
Displacement: 19.93CC
Weight: 554g
Practical RPM: 2,000 - 17,000