The deservedly popular Saito 125, it is lighter and more powerful than the Saito FA-120 it replaces and its unique size allows modelers to apply its awesome power to a wide variety of airplane sizes. It happily powers anything from .90-size sport aerobats all the way up to 1.20-size sport and IMAC planes.
Product features include;
Less weight but more thrust.
10 ounces lighter than the Saito FA-120.
Turns an APC 16×6 at 9,000 rpm.
13mm Muffler threads.
With 10 fewer ounces and .05 more cubic inches than the Saito FA-120 it replaces, the Saito FA-125A. That is what you call improved power to weight ratio.
FA-125a/FA-125aGK Instruction Manual – FA-125a-Manual
Practical RPM: 2,000 ~ 11,000
Recommended Prop: 14 x 8 ~ 16 x 6in