Dream big with the X1 Stealth Gen 3. Designed for all terrains, leave no trail uncrossed with advanced torque sensing, instant throttle capabilities, and customized tuning. Made for a powerful yet natural riding experience.

  • RATED POWER: 1500W
  • PEAK TORQUE: 150N.m.
  • COMPATIBLE: 36V to 52V
  • CHAINRING OPTIONS: 32T & 38T (30-46T with BCD104)

The X1 Stealth is the all new lightweight mid drive conversion system. With up to 1500W of power output, a small form factor, and quiet performance, this is the ideal system for riders wanting a stealthy setup.

The X1 Stealth is complete with:

  • torque sensing capabilities
  • fully customizable mobile app
  • Range of bottom bracket sizes
  • High clearance
  • Fits all frame types including carbon
  • 2 rider modes (e.g., street, off-road)
  • 9 assist levels​

Rated Voltage
Max. RPM (at Crank)
Max. Rated Power
Max. Torque (at Crank)
Overall efficiency
Weight (Motor & controller)
Total wgt. w/crankset & BB
Bracket Materials
Crank Arm Length
Q Factor
Control Method
Motor Sensor


Speed sensor
Bottom Bracket

PAS sensor
Brake sensor

BSA Threaded Frames

Pressfit Frames

Motor type
No-load Motor kV
Stator lamination
Efficiency (at 2N.m.)
Rated RPM (at 2 N.m.)
Epoxy sealed​

First stage reduction
Second stage
Overall reduction ratio
from motor to crank

​36-72 DCV (nominal) (10-20s Batteries)​
>260 RPM
150 N.m.
≥ 93%
Anodized Black
165mm or 175mm
190mm (208mm for fat bikes)
Hall & temperature sensor
11/53 option with 32T bike chainring
11/63 option with 38T bike chainring
​500c, 750c, DS102 / SW103 Display (up to 52V)
Right thumb, left thumb, Universal thumb, half-twist, or full throttle
Magnetic sensor
Waterproof wire (Julet connector)
BSA threaded or pressfit option with additional spacers:
3, 5, & 7mm spacers for BSA threaded
2x 2mm spacers for pressfit
Integrated torque & cadence sensor
Magnetic sensor for all brakes (optional)

34.5mm bottom bracket diameter
​68mm, 73mm, & 83mm width
41 bottom bracket diameter
92mm width

​BLDC Out-runner
N45UH (>180 °C)
>9000 RPM
Black epoxy potted stator

1:6 low noise brass planetary gear
Hardened steel sun & ring gear
​219H Chain
1:28.9 (11/53T)
1:34.4 (11/63T)

CYC RIDE CONTROL APP for X-Series Controllers

The CYC RIDE CONTROL app is the X1 PRO and the X1 Stealth's configuration system. This is where you will customize your experience & monitor your performance.
The app is connected to your controller via Bluetooth & will allow you to set up your system & change parameters according to your preference.

The CYC RIDE CONTROL app allows you to do multiple things:

  1. Set up your desired power output's for 2 different modes
  2. Customize your parameters for pedal assist, throttle performance, & gear preferences
  3. Configure your torque sensor
  4. Monitor your performance
  5. Set up your e-bike battery & peripherals
  6. See warnings & clear errors

This app is needed to set up a few things to get started such as your regions legal limits, your battery voltage, & wheel diameter. You will also need the app to clear any warnings or errors that may occur.

Complete instructions can be found here:

CYC Ride Control App User Guide 08/11/2022

Sold out

SHIPS from USA!!

CYC X1 Stealth Gen3

The CYC X1 Stealth Gen 3 mid-drive motor is a high-end/high-performance ebike conversion system that is the creation of CYC Motors in Hong Kong. These guys know what they are doing. They created this bad boy as the stealthy baby brother of the X1 Pro, but it is still one of the most powerful motors available.

This motor preserves a perfect chain line on any bike and tucks up high off the ground, even on modern mountain bikes with a curved downtube. With its torque sensing and cadence sensing bottom bracket, it delivers power at the cadence you choose and senses when you crank up your effort and delivers more power on demand.

This motor is versatile, fitting 95% of frame types, including carbon frames. It can be set up as a class 1, class 2, or class 3 ebike from 350 to 750 watts. Off-road modes go from 750-2,000 watts (depending on battery).

It comes with everything you need except the battery, and we have those in 52v and 72v at 50 amps and from 300-watt hours to over 1000-watt-hours.


  1. Motor-reduction assembly
  2. 219H chainring-reduction assembly
  3. Bicycle chainring with chainring cover
  4. 219H golden KMC chain
  5. ISIS splined bottom bracket & spindle
  6. 165mm/ 175mm crank arm set
  7. Gen 3 torque sensing freewheel module
  8. CYC X6 controller
  9. Built-in bashguard
  10. Waterproof wire harness
  11. Motor hanger
  12. 3, 5, & 7mm spacers for BSA threaded 68/73/83mm version / 2x 2mm spacers for BB92 version
  13. DS102 / SW103 Display (up to 52V only)
  14. Thumb throttle/ Half-twist throttle/ Full twist throttle
  15. Magnetic speed sensor
  16. User manual

For lights powered from the main battery, you may want to consider the CYC or EBC high-power light sets. They both have a handlebar mounted switch to turn the headlight on and off. The CYC headlights have two separate lights that each mount directly on the handlebars. The EBC Headlight includes low-beam with horizon cutoff, high-beam, and running lights and mounts on the front stem bolts freeing up handlebar space and not interfering with the ebike display. Both lights are brighter than most car headlights.

For a great 1x drivetrain, the ebike-rated Box Two and Box Three drivetrains are durable and affordable. With all the power this motor can deliver, you will still wear out the higher (smaller) gears on the rear sprocket. Fortunately, Electrify Bike Co. has arranged with Box to sell these as a set of 4 sprockets for just $20, so you can just change them out when they start to slip.

NOTE: Electrify Bike Co. does the final assembly of CYC motor kits in the USA and we ship to all locations in North America. We do not ship to China and Hong Kong.

Due to high demand, there is a backlog for this motor. Orders are shipping on a first-come, first-served basis. Delivery time for new orders is about 1-2 weeks. CC charged to hold your place. Orders refunded immediately if you choose to opt out.


Let one of our experts help plan your conversion kit.

Written by an anonymous user on

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