Here is what i found on limitless aero's site but some first hand experience would be awesome. I'm on a budget and the GP looks like great bang for the buck.: Specs:
Displacement: 123cc
Weight: 2517g
Horsepower: 12hp
RPM:1600~8500
Warranty:2 years
Rpm: GP-123 with Mejzlik 28*10 :6700~6800
Engines will include mufflers
Comes with real walbro carbs and NGK CM6 Plugs
GP model engines are specially designed for giant scale model aircraft. All the critical components (cylinder,piston,ring) are manufactured in Taiwan.
Our piston and cylinder suppliers make some of the highest quality pistons in Asia. They supply pistons to companies like Rotax, Yamaha, Toyota, Honda....etc. Our engine uses the highest quality Germany made FAG bearing and real Japanese made Walbro carburettor. Each engine is test run before it is shipped to ensure that the engine will bring you the most stable performance while delivering the highest level of performance.