M500 M600 M510 Mid‑Motor Internal Output Steel Gear, Helical Reduction Metal Gear for Bafang G520 G521 G522 Ebike Mid‑Drive Motor Repair

Bafang Internal Final‑Stage Output Metal Helical Gear for M500 M600 M510 (G520 G521 G522) Mid‑Drive Motor

This is the internal final‑stage output helical metal reduction gear installed inside Bafang mid‑drive motor gearbox. It acts as precise replacement spare component for M500(G520), M600(G521) and M510(G522) e‑bike mid‑drive motor systems, to restore stable power transmission within the motor gearbox.

Compatibility

✅ Bafang M500 Mid‑Drive Motor (Internal code G520)

✅ Bafang M600 Mid‑Drive Motor (Internal code G521)

✅ Bafang M510 Mid‑Drive Motor (Internal code G522)

Important Note: There is no official Bafang “M5” motor model; “M5” comes from incorrect raw‑text transcription. This is gearbox internal final‑stage output gear, NOT freewheel / one‑way clutch assembly. Not compatible with M400, M420, M800, M820, BBS‑series and other Bafang mid‑drive motors.

Key Features

✅ Exact OEM Dimension Replacement: Strictly follows original factory gear specifications for seamless fitment inside G520/G521/G522 gearbox.

✅ High‑Strength Metal / Steel Construction: Robust metal helical gear delivers improved torque capacity and outstanding durability, handles heavy‑load and demanding off‑road riding conditions.

✅ Helical‑Tooth Design: Helical gear geometry ensures smooth, low‑noise power transfer inside the mid‑motor gearbox.

✅ Gearbox Internal Repair Part: Replaces worn, chipped or broken original final‑stage output gear to recover full motor performance.

✅ Cross‑model Compatibility: Interchangeable for Bafang G520, G521, G522 mid‑motor variants (M500 / M600 / M510).

Specifications

Brand: After‑market compatible for Bafang

Product Name: Internal Final‑Stage Output Metal Helical Gear

Fitment: Bafang M500(G520), M600(G521), M510(G522) mid‑drive e‑bike motor Installation

Position: Inside motor gearbox, final‑stage reduction output gear

Material: High‑strength Metal / Steel

Package: 1 × Internal Final‑Stage Output Metal Helical Gear

Important Notes

❗ This is gearbox internal metal final‑stage output gear, NOT freewheel or one‑way clutch. ❗ Only fits M500(G520), M600(G521), M510(G522) mid‑drive motors. Not fit M400, M420, M800, M820, BBS‑series mid motors. Please double‑check your motor commercial name and internal G‑code before ordering. High‑temperature ebike gear grease is strongly recommended during gearbox reassembly to extend service life. Only the metal gear is included; motor housing, bearings and other hardware shown in reference pictures are NOT contained in package. Excellent spare stock for ebike repair shops, DIY motor rebuilders and wholesale distributors.