CYC X1 Stealth Motor, 1500W ASI BAC855 Controller, Torque Sensing BSA 68/73/83mm Version

£999.00 (price including VAT)

CYC X1 Stealth Motor, 1500W ASI BAC855Controller, Torque Sensing BSA 68/73/83mm

2 in stock



CYC X1 Stealth Motor, 1500W ASI BAC855 Controller,

Torque Sensing BSA68/73/83mm Version

UK Stock all taxes paid (including EU)

Take a look at this video!!

Free UK shipping – Internatiional orders 20% VAT Tax removed at check out – Sorry No EU Shipping,

X1 STEALTH (BSA 68/73/83mm version, please check you bottom bracket type is compatible)

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

The X1 Stealth is complete with:

– integrated torque sensor

– fully customizable mobile app

– various bottom bracket fitments

– 2 rider modes, with up to 9 assist gears

STOCK ITEM Torques sensing, 11/63 chain version with 38T chainwheel


X1 STEALTH 36-72V 1500W mid drive conversion kit

Display: 750c display
Bottom bracket width: RSA 68/73/83mm version
Chainring options: 11/63T
Crank Arm Length: 170mm
Throttle options: Thumb throttle

BAC855 controller setting: 72V can be changed through the CYC App

More details can be found here:

User manual can be found here:

Please note, we give a full warranty on this. The motor is in it’s latest version, now more reliable than ever and modified to improve the end result of the earlier versions. CYC in Hong Kong are giving an excellent warranty but sometime there is a wait until a part is redesigned or goes to fabrication. Parts are normally shipped to us with 10 working days

Take a look here:

Help and instructions:

**** Due to the nature of this device (Off-Road) and exposure to water, rain, mud and the possibility to sustained high powered use/abuse, our warranty is limited to 12 months from time of purchase.

Warranty parts may take up to two weeks to replace as they are fast shipped to us from Hong Kong.  Parts are not covered  for poor installation or misuse (crashes etc). We will remove new parts from motor in stock if necessary to speed up your replacement.

Items are liable to change without notice

Helpfull videos:

X1 Stealth Install video:




We reserve the right to slightly modify or change this product without notice.


Buyer releases Electron Cycles or any person trading on or behalf of the business known as Electron Cycles from any liabilities, therein known as Electron Cycles (expressed or implied, arising by law or otherwise) that may occur from the use of products sold by Electron Cycles and purchased by Buyer. These products are being sold for “Off Road/Competition Use” only and may be used only on two wheel vehicles (bicycles, electric bicycles, two wheel electric powered vehicles) used solely for “Off Road/Competition” (off-road being defined as a private land with land owners permission and not public highway or byway). The Buyer also recognises that Lithium batteries are classed as hazardous and should not be: stored, used, charged in place, facility any area that is not fire proof or safe to do so. That batteries should not be taken into the family home, office, workplace or school place. No other applications are intended or implied. The Buyer of product sold or provided by Electron Cycles acknowledges and agrees that Seller disclaims any warranty and expressly disclaims any liability for personal injury or damages or any damages to vehicle, expensed occurred, personal property or third persons. Electron Cycles will uphold the warranty of the manufacture of the product sold for a minimum of six months from date of purchase from manufacturer defect. In the event a manufacturer’s warranty exists, it is agreed and stated that Under no circumstances shall the seller or manufacture be liable for any labour charged or travel time incurred in diagnosis for defects, removal, or reinstallation of this product, or any contingent expenses.







Additional information

Weight 7 kg
Dimensions 42 × 28 × 20 cm