Key Features

• Fits common and popular 50-size helis on the market
• Designed to be the most powerful in its class
• Incorporates SetRight needle valve assembly
• Piston/liner made of unique combination of ABC
• Uniquely designed cooling head
• Throttle arm markings on throttle side of the carb body and throttle barrel for easy engine tuning

Specs

• Type: 2 - Stroke Helicopter Engine
• Displacement: .52 cu in (8.52 cc)
• Bore: 22.38 mm (.88")
• Stroke: 21.53 mm (.85") 
• Cylinders: Single
• Engine (Only) Weight: 15.36 oz (435.4 grams)
• Crankshaft Threads: 1/4 x 28 UNF
• RPM Range: 2,000 - 16,000
• Fuel: 15 - 30% Nitro Heli fuel
• Mounting Dimensions: 4.16 x 1.85 x 3.68 in
• Cylinder Type: Ringed
• Carb Type: Barrel with two needles
• Crank Type: Dual Ball Bearing