EMX® QS138 90H Kit

The "4kW" 90H model of the qs138 family is the most powerful of the bunch. Sporting a longer overall length means a longer rotor which in turn means more torque. This motor is well suited for larger power sports applications or high duty cycle situations like Karting that require that extra torque and endurance the 90h can deliver. 

The all-new EM-260 Controller that brings the power up to an astonishing 28kW! This Combo is ideal for Competitive large wheel motorcycles or Karts that require massive power and thermal capacity to nab a spot on the podium.

THE ELECTRO & COMPANY DIFFERENCE

Our kits come pre-wired and pre-tuned for power sports applications with our specialty being competition motocross. You will save years on your life not stressing about the details of wiring and tuning your setup that would not come with proper instructions or documentation with overseas products. Just plug in an E&C kit, apply power and go! We build you a custom braided harness complete with Waterproof connectors, Switches, Throttle & Controller that is pre-tuned with our proven EMX setup.

EMX Kit Includes

• 1 X QS 138 90h Mid Drive Motor

  • Tapered Shaft with key: 14T 428 sprocket

  • Gear Reduction Variant does not include sprocket
    • Compatible sprockets HERE
      
• 1 X EM Controller w/ E&C EMX Tune
• 1 X Throttle
• 1 X Aluminum Switch Gear & Power Switch
• 1 X Volt Meter
• 1 X Hand Built EMX Harness

Key Features

• Direct Drive or 1:2.35 gear reduction (selectable when ordering)
• Lightweight and small dimension compared to other motors of similar power outputs
• V configured rotor design allows for higher RPM with flux weakening
• High Torque suitable for high performance high load situations such as climbing and racing.
• No setup is required with Electro & Companies tried and true plug and play service

Display Options

• Volt Meter (Included) - Handlebar mounted voltage meter that allows the rider to get an exact voltage reading at a glance.
• DKD Display (Optional) - Heads-up display unit that shows the rider battery life, speed, amperage draw, mode selection & more.
  

Mode Options

(Specify in Customer Notes at checkout)

• 3 Power Modes (Standard) - Mode switch comes with 3 power modes that vary based on percentage.
• 2 Power Modes + Reverse (Optional) - You can notify the team in the notes of your order if you need this option to be programmed instead. 

Motor Direction

(Specify in Customer Notes at checkout)

We have the ability to change the direction of this motor depending on the needs of your project and where the motor is mounted. 

• Counter-Clockwise (Default)
• Clockwise 
  • ONLY applicable to Direct drive, V3 gear reduction cannot spin clockwise
    

Motor Specifications

Weight: 29lbs
Diameter: 162mm (mounts not included)
Length: 231mm
Reduction: 1:2.35 (Optional V3)
Rated RPM: 4000
RPM with Flux: 6500+
Rated Power: 7.5kW continuous
E&C Findings: 35kW bursts

Controller Specifications

Standard EM-260

Length: 226mm
Width: 149mm
Height: 73mm
Voltage: 40-90v
Continuous Amps: 160A
Burst Amps: 350A
Max Output: 25,000w (25kW)

Kits purchased with battery come with 5a charger and matched controller leads.

Standard motor rotation direction is counterclockwise, as for motorcycles with the chain on the left hand side. If you need a clockwise rotation direction please request when ordering.

• ONLY applicable to Direct drive, V3 gear reduction cannot spin clockwise