Specification:
- Displacement(c.c. / cu.in.): 1.75 c.c. / .107cu.in.  
- Bore(mm / in.): 13.4 mm / 0.528 in.  
- Stroke(mm / in.): 12.4 mm / 0.488 in. 
- Practical R.P.M.(R.P.M.): 2,500 ~ 18,000 rpm  
- Output(BHP/RPM): 0.27 BHP / 17,000 RPM 
- Weight(g/oz): 161.9 g / 5.71 oz 

The GP series engines are equipped with maintenance-free bronze bushings, Schnuerle porting, a non-ring piston, an easily adjusted air bleed carburetor, and a safe angular needle valve.