Sur-Ron electronics repair
We diagnose and repair the entire Sur-Ron electrical and control system: controllers, MCU, wiring harnesses with QS8 connectors, Domino throttle, dashboard, ignition and water damage. Work is done in our real workshop in Kaunas - send your bike or the faulty part to us from anywhere in the EU.
Sur-Ron electronics repair - finding and fixing faults in an electric motorcycle’s electrical and control system: the controller (stock or Torp, eBMX, SiliXcon), controller tuning, the harness and QS8 connectors, the Domino throttle, the dashboard, ignition and moisture damage. In the FabiRide workshop in Kaunas we run full diagnostics with error code readout, send a quote before any work and back it with a warranty. We were the first workshop in Lithuania to officially integrate ASI into Sur-Ron and Talaria, and we program in-house both ASI and SiliXcon controllers.
The whole Sur-Ron electrical system - in one place
From power cut-outs and error codes to overheated connectors after a water crossing. Every fault starts with finding the real cause, not swapping parts blind.
Controllers
Stock and Torp / eBMX / SiliXcon controllers: fault finding, burnt MOSFETs and overheating issues solved, replacement.
Controller tuning
We configure motor controllers (MCU): current limits, response, protections and ride modes. ASI and SiliXcon we program in-house.
Harness and QS8
We build and repair 6AWG power harnesses, replace QS8 connectors and fix overheated or melted contacts.
Domino throttle
We diagnose and replace the throttle, check and calibrate the Hall signal and trace broken wires.
Display / dashboard
We repair dead or flickering dashboards, restore readouts and read out error codes.
Ignition switch and power
We solve ignition, key and power line faults when the bike will not switch on or loses voltage.
Connectors and contacts
We replace oxidised and melted connectors, refresh ground lines and high-current contacts.
Water damage
After rain or a water crossing: strip-down, drying, corrosion removal and waterproofing of contacts.
Error code diagnostics
We read and interpret error codes to find the real cause - not just the symptom.
Diagnostic protocol - 6 steps
A clear process from intake to warranty. Before any repair you see a quote - you pay only for approved work.
Fault description
We record the symptoms, riding history and the conditions in which the fault appears.
Error code readout
We read dashboard and controller error codes and log the state of the system.
Circuit testing
With a multimeter and under load we check power lines, connectors, Hall sensors and the throttle.
Findings and quote
We establish the real cause and send you a transparent quote.
Repair and tuning
We replace parts, rebuild the harness, and repair or tune the controller / MCU.
Testing and warranty
We test the system under load, do a test ride and back the work with a warranty.
The most common Sur-Ron electronics faults and their fixes
This table helps you work out faster what your symptom means. The exact diagnosis is still made on the bench - many faults have several possible causes.
| Symptom | Possible cause | What we do |
|---|---|---|
| Motor will not turn - error code on the display | Hall sensor or controller fault | Circuit testing, sensor / controller replacement or tuning |
| Sudden loss of power (“cut-off”) | BMS protection, contact oxidation, overheated QS8 connector | BMS and power line diagnostics, harness and connector rebuild |
| Throttle dead or sticking | Domino / Hall throttle failure, broken wire | Throttle replacement and signal calibration |
| Display dead or flickering | Power line, connector, ignition switch | Power circuit and switch check, contact restoration |
| Functions lost after rain or a water crossing | Moisture in connectors, corrosion | Strip-down, drying, contact cleaning and waterproofing |
| Charging stops or the battery will not charge | Charger, BMS or charge port problem | BMS and charge circuit diagnostics, connector replacement |
| Reduced power, current limited | Controller protections, temperature limit, configuration | Error code analysis and controller / MCU reconfiguration |
Controller repair and tuning
The controller is the core of the Sur-Ron electrical system - it governs motor current, response and protections. We work with stock controllers and the most popular aftermarket options: Torp, eBMX and SiliXcon. We find burnt components, solve overheating and current limiting problems, and integrate and match new controllers to the bike.
ASI and SiliXcon controllers we program in-house, and Torp and eBMX we tune. We set current limits, throttle response, regen and protections to suit your riding style and what the motor can take. That lets you safely use the potential of a Light Bee X, Ultra Bee or Storm Bee.
- Torp, eBMX, SiliXcon and stock controllers
- MCU configuration: current, response, protections
- Overheating and “cut-off” problems solved
Sur-Ron models and system voltage
| Model | Nominal system voltage | Note |
|---|---|---|
| Sur-Ron Light Bee X | 60 V | The most popular - the widest choice of tuning and controllers |
| Sur-Ron Ultra Bee | 74 V | More powerful platform, larger battery |
| Sur-Ron Storm Bee | 90 / 104 V | The highest-power model |
| Talaria Sting / Sting R | 60 V | A popular Light Bee alternative |
| Controller | Type | Best for |
|---|---|---|
| Stock (OEM) | Locked | Standard riding, factory characteristics |
| Torp | Tunable | Better power response and smoothness |
| eBMX | Tunable | High current, more aggressive setup |
| SiliXcon | Tunable | Precise control and even delivery |
Harness, QS8 connectors and power supply
The high-current circuit is the most common cause of “disappearing power”. An overheated or badly crimped QS8 connector, thin wire or oxidised contact causes voltage drop and trips the protections. We build and replace 6AWG power harnesses and fit quality QS8 connectors and adapters (e.g. QS8-Talaria Sting).
We also solve ground line, ignition, switch and signal wiring faults. Every connection is tested under load so the problem does not come back after the first hard ride.
- 6AWG harness and QS8 connector replacement
- Restoration of overheated and melted contacts
- Adapters between connector types
Domino throttle, display and ignition
If the bike does not respond to the throttle, sticks or runs unevenly, the usual culprit is the throttle or its Hall signal. We diagnose and replace throttles (including Domino), check for broken wires and the signal, and calibrate the limits.
We also repair the dashboard: a dead or flickering display, lost readouts, error code display. We solve ignition and switch faults when voltage disappears or the bike will not switch on.
- Domino / Hall throttle replacement and calibration
- Display and readout restoration
- Ignition, switch and power line repair
Pricing and warranty
You always see the exact price in the quote before work starts - no surprises. Below - how we work and what determines the final price.
We start with diagnostics and an error code readout - so we fix the cause instead of guessing.
The scope of basic diagnostics depends on the nature of the fault. More complex repairs depend on parts availability.
We provide a warranty on the work carried out and the parts fitted. The exact scope depends on the type of job.
The price depends on how complex the fault is, the parts needed and the amount of work. We send the quote before any work.
Why FabiRide
We are electric motorcycle specialists with a real workshop in Kaunas, S. Raštikio g. 28. We repair Sur-Ron, Talaria and Eride Pro e-motorcycles and e-bikes - from electronics to batteries.
We take in bikes from across Europe, and you can simply ship the bike or the part to us. We work weekdays 10:00-18:00.
Early pioneers
Among the first in Lithuania to build and repair custom e-motorcycles.
ASI and SiliXcon
We tune the most advanced motor controllers (MCU) in-house.
Full electronics
From error codes to custom harnesses and battery pack building.
Sur-Ron electronics repair - FAQ
How much does Sur-Ron electronics repair cost?
How does the repair process work?
Can you recover a Sur-Ron after water or a river crossing?
Do you tune Sur-Ron controllers and MCUs?
Do you give a warranty on the repair?
Do you repair Talaria, Eride Pro and other e-motorcycles?
Do you accept bikes from other countries?
Sur-Ron electronics fault? Let’s start with diagnostics.
Describe the symptoms by phone or email - we will tell you the next steps and arrange shipping to our Kaunas workshop.
Controllers we work with
We tune, program and replace the most advanced e-motorcycle motor controllers - in the FabiRide workshop in Kaunas. We work with most controllers on the market, and ASI BAC and SiliXcon controllers we program and match to any motor so the system runs smoothly.
Torp TC500 2.X / TC1000 2.X FOCPlug-and-play power upgrade with Bluetooth tuning - from 25 kW (TC500) to 60 kW (TC1000).
eBMX X-9000 V3VESC/FOC, up to 50 kW and up to 1600 A burst phase current, IP67 - for high-power builds.
SiliXcon SL / SC / AMRuns on its own platform with the manufacturer’s software. We program and match it to the motor - 18-36 kW.
ASI BAC4000 / BAC8000Race-grade FOC controllers, 17-32 kW. We program and match them to any motor.
Models: Sur-Ron Light Bee X · Ultra Bee · Storm Bee
Related pages
More on Sur-Ron tuning, repair and electronics from the FabiRide workshop in Kaunas.
