XYZ 50HP

XYZ 50HP

It`s a Rotary Valve Engine compare to XYZ 50S 

Specifications:
Displacement: 50.8 cc (3.1 cu in)
Bore: 1.69 in (43 mm) 
Stroke: 1.38 in (35 mm)
Weight: 45.9 oz (1300 g)
RPM Range: 1,750-9,000
Output: 5.5 hp @ 9,000 rpm
Requires: Gasoline, 2-cycle oil, ignition battery & propeller 
Includes: electronic ignition, muffler, spark plug, gasket, bolts,  manual
Suggested Propellers: 22x8 , 22x10, 23x8 , 23x10
Suggested Break-in Prop: n/a

Technical Data:
Ignition Battery: 4.8-6.0V NiCd or NiMH
Compression Ratio: 10.5:1
Gasoline/Oil Mix: 30:1 
Replacement Spark Plug: NGK CM6  or equivalent