Specification:
- Displacement(c.c. / cu.in.): 20.76c.c. / 1.267 cu.in. 
- Bore(mm / in.): 31 mm / 1.220 in. 
- Stroke(mm / in.): 27.5 mm / 1.083 in.
- Practical R.P.M.(R.P.M.): 1,800 ~ 15,000 rpm 
- Output(BHP/RPM): 3.5 BHP / 14,000 RPM 
- Weight(g/oz): 780 g / 27.51 oz 

The PRO-120's available in the traditional side exhausted and rear, delivers the torque and power necessary to make today's larger airplane performs well and provides years of trouble-free performance.