Design matters. Its a motor specially designed for extremely high-level racing. The rmp of g3 stock motor is significantly improved, the kv & torque are improved by 16% and 4% respectively, compared with the v10 g2 stock motor. Lightweight. The g3 modified & stock motors only weigh 161g & 132g respectively, the weights are reduced by 11% & 21% when compared with the previous generation g2 motors. The built-in high precision hall sensor combined with the high precision and balanced rotor guarantee outstanding linearity of the motor. The mechanical timing can be adjusted finely and smoothly; the skid-proof lines on the rear end plate of the motor guarantee the stability of the timing after adjustment. For g3 stock motors (10. 5t~25. 5t), the timing is adjustable from 30 degrees to 60 degrees; for modified motors (3. 5t~8. 5t), the timing is adjustable from 20 degrees to 50 degrees. The motor case is designed to be easy to dismantle for maintenance purposes and for the replacement of common wearing parts. The special shell design which makes the stator core expose to the air maximizes cooling. Big holes on the end plates of 10. 5t~21. 5t motors further help reduce heat; small holes on the end plates of 5. 5t~8. 5t motors effectively keep sand or dirt from getting inside and damaging the motor(s). The use of high-performance stator core, heat(200?)-resistant wire, heat(200?)-resistant rotor with strong structure, imported high precision and high strength bearings, and copper solder tabs with super current endurance guarantees outstanding performance and super durability. Its compliant with ifmar, roar, efra, brca rules, and certificated by rohs, ce, fcc (hw30401123)