Its a fantastic way to ratchet up horsepower for more flying fun! The 120AX, which boasts 20% more displacement than a .91, can turn bigger props with ease, resulting in improved 3D, precision and sport flying. Boost your planes performance, without compromising weight  bolt in a 120AX and see the difference for yourself!

Delivers 20% more power than a .91.

At 21 ounces, the 120AX is a very minimal weight increase over a .91.

The new angular head design not only looks great, it significantly increases surface area for better heat transfer.

Stock Numbers: 

Displacement: 1.20 cu in (20 cc)

Bore: 1.197 in (30.4 mm)

Stroke: 1.083 in (27.5 mm) 

Practical rpm: 1,800-9,500

Output: 3.1 hp @ 9,000 rpm

Engine weight: 22.8 oz (647 g)

Muffler weight:

    7.07 oz (219 g) with 90 adapter installed

    7.91 oz (245 g) with extension installed

Includes: #8 glow plug, 70D dual-needle carburetor, E-5020 Power Box muffler w/two adapters

Recommended Props: 15x10-12, 16x8-10