FingerTech FT1806 750KV Brushless Motor – Updated The updated FingerTech FT1806 750KV brushless motor is the latest version of the dedicated drive motor for the Mega Spark brushless gearmotor system — and you can also use it without a gearbox as a weapon motor for 150g fairyweight bots. This is a drop-in replacement for the motors on the Mega Spark gearmotors and can be paired directly with the Mega Spark gearbox as an OEM replacement or an upgrade to your KV. This is the latest version from FingerTech Robotics — redesigned with a stronger shaft and expanded voltage range. The most significant change in this version is the redesigned shaft. The internal shaft is now 3mm, stepped down to a 2mm output to accept the standard 11T pinion gear. Critically, the e-clip is now located on the 3mm portion of the shaft — eliminating the weak point found in other motor designs where the e-clip sits on a narrower shaft. This strengthened shaft makes this updated FT1806 motor a legitimate weapon motor for 150g robots, in addition to its proven role as a drive motor. At 750KV, this motor delivers maximum torque and lower top speed — ideal for heavier beetleweights or pushing-power-focused builds. It now runs on 2S–6S LiPo (up from 2S–4S), giving builders more voltage flexibility than the original. For drive use, pair it with a BL40A-R AM32 Reversing Brushless ESC — AM32 firmware delivers smoother low-speed control and better torque than BLHeli. For weapon use, the BL20A BLHeli_S Brushless ESC is recommended. This listing includes the FT1806 750KV motor only. A pinion gear is not included. If you need a pinion, you have three options: (1) purchase the 11T Brass Pinion Gear separately; (2) note that the Mega Spark planetary gearbox includes one pinion — if you are purchasing the gearbox alongside this motor, no additional pinion purchase is needed; or (3) choose the FT1806 750KV – Original, which includes a pinion gear pre-installed while stock lasts. Installing a pinion requires a press fit, which can be tricky — an arbor press is ideal, but a bench vise or C-clamp can work well. Always support the shaft from below to protect the bearings, and make sure that the force is applied parallel to the shaft. Canting either the motor or the pinion can damage the motor bell, the bearings, or cause the motor to wobble. Loctite is not a viable alternative — the pinion requires a true press fit.
