This motor is perfect for small & medium to large size electric motorcycles. This is the more compact version of the infamous 138 70h model. If you have a tight space but need big power the qs120 is for you. This motor is capable of over 15kW Bursts!

Includes

1- QS 120 2kW direct drive motor with 10t sprocket

OR

1- QS120 v3 gear reduction motor with 2.35:1 internal reduction and 14t 428 sprocket

Note: V3 gear reduction motor can ONLY spin counterclockwise and does not support full power in the clockwise direction

Key Features

Light weight and small dimension compared to other motors of similar power outputs
High Torque suitable for high performance high load situations such as climbing and racing
Supports regenerative braking
Proven reliability

Compatibility

EM-100 Controller - QS120

TruMoto Noisy Cricket - QS120 v3

Specification

Motor Type: BLDC Permanent Magnet Inner Rotor Motor With Hall Sensor
Brand: QS Motor, QSMOTOR
Motor Design: Single Axle
Matched Wheel: 12inch Wheel (as default)
Magnet Height: 70mm, 40pcs, 5 pole pairs
Diameter of stator: 120mm
Rated Power: 2000W
Rated Voltage: 72V (as default)
Speed: 60KPH
No-load rpm: 2800rpm without flux weakening, 4400RPM with flux weakening.
Max Torque: approx 45.4N.m without Reduction ratio, approx 216.7N.m with 1:4.77 gearing ratio
Max Efficiency: 88%
Continuous Battery Current: Pending (72V)
Peak Battery Current: 60A (72V)
Suggest Peak Phase Current: 250A
Thermic Probe: None as default (KTY83/122 is available, please let sales know if needed)
Working Temperature: Pending
Hall Sensor: Single Hall Plate with Waterproof Connectors
Phase Wire: 8mm² Cross Section (not include insulation layer)
Hall Sensor Phasing angle: 120 degree
Waterproof Grade: IP54
Color: Black
N.W./G.W.: 10.8kgs/11.5kgs
Package Dimension: 34cmx34cmx33cm

E&C Findings

Based on our testing we have come up with some alternative ratings. These ratings are strictly our opinion and warranty will not be provided for any motor pushed beyond QS recommended ratings.

Details

Max Battery Current: 150 amps
Max Output: 10,800w or 10.8kw

We recommend buying our E&C sprocket to ensure proper fitment and to reduce the chance of damage to the spline drive, Check spline dimensions carefully for proper fitment.

All Parts & Accessories

Electrobraap Fork Tube Guard

Electro & Co. Fork Tube Guard

QS138 70H V2 Motor

QS120 Motor

QS 138 90H 10T 520 AMP Sprocket

Amp 420 QS138 10t Sprocket - Front

QS138 - Votol Controller Hall Sensor Replacement

QS138 70h V1 Motor

E&C 420 / 428 / #35 Rear Sprocket - Custom

QS138 90H (4000w)

QS90 (1000W)

QS165 Sprocket - Sur Ron & KO