CG125 Electric Conversion Kit — 3000W 72V Builds, Specified by the Factory
A CG125 has the frame and wheel size to carry a serious electric drivetrain. We build matched hub motor + FOC controller + battery + harness packages in Wuxi, and support fitment, samples and after-sales in English from Lahore — so a workshop in Pakistan is dealing with the manufacturer, not a trading intermediary.
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Three CG125 conversion specifications
The CG125 is heavier and more powerful than a 70cc commuter, so it tolerates — and often needs — a higher continuous current rating. All three specifications below use a programmable FOC sine-wave controller; the difference is the motor winding, battery capacity and thermal headroom.
| Specification | Motor / voltage | Battery class | Intended use |
|---|---|---|---|
| City 1500W | 1500W spoke hub, 60V | 60V 20–24Ah | Solo commuting, flat routes, lowest conversion cost. |
| Daily 2000W | 2000W spoke hub, 60–72V | 72V 24–32Ah LiFePO4 | Pillion passenger, delivery work, stop-start traffic. |
| Performance 3000W | 3000W hub, 72V | 72V 40Ah class | Hills, heavy loads, sustained higher speed. Publicly advertised local packages in this tier use 72V 40Ah. |
These are engineering configurations, not fixed products or prices. See the Pakistan conversion kit price guide for component-level cost drivers, or the CD70 conversion kit for the lighter 70cc platform.
Fitment: what to measure on a CG125
Wheel and brakes
- Typical 18-inch spoked wheels; measure the actual rim and spoke count before lacing.
- Confirm rear dropout inside width and axle diameter against the motor’s axle flats and torque arms.
- Check drum brake plate clearance against the motor cover; a disc conversion changes the hub requirement.
Frame and electrics
- Battery cradle volume and centre of gravity — a 72V 40Ah pack is substantially heavier than a 48V lead-acid set.
- Controller mounting with airflow and water protection for monsoon conditions.
- 12V DC-DC converter for lights, horn and indicators; do not tap a single cell group.
Do not order from the model name alone. CG125 variants and locally assembled copies differ in rim size, dropout spacing and brake hardware. Use the CD70 / CG125 fitment guide and send measurements to the Lahore team before confirming a specification.
Component references: spokes hub motors (for lacing into an original rim), FOC controllers, EV parts and displays, and the 12-inch / 10-inch hub motor catalogues for scooter platforms.
Why the controller matters more than the peak wattage
A 3000W motor on a weak controller feels flat and overheats; the same motor on a correctly rated programmable FOC controller pulls cleanly from standstill and stays cool in traffic. Three settings decide how a converted CG125 actually rides:
- Continuous phase current — must be within both the motor’s thermal limit and the battery BMS discharge rating.
- Hall angle / sensorless tuning — incorrect learning causes cogging, noise and reverse-rotation faults on first commissioning.
- Throttle map and regenerative braking — tune for a predictable launch with a pillion passenger, and check brake cut-off wiring.
Our controller-to-motor matching guide explains the sizing method, and sine wave vs square wave controllers explains why FOC matters for noise and heat. We pre-tune parameters for the supplied motor and can adjust them for local load and throttle preference.
Cost, payback and fleet maths
Public 2026 Pakistani workshop advertising placed complete conversion packages in tiers near PKR 85,000 / 150,000 / 250,000, with a 3000W 72V 40Ah performance build in the upper tier; retail 3000W 72V hub motors were listed around PKR 44,900–65,000. Those figures are market benchmarks, not a Wuxi Sine Power retail price — factory quotations are issued per specification and quantity.
At roughly PKR 275 per litre and 35–45 km/L for a 125cc four-stroke, petrol costs about PKR 6–8 per km. Electricity at PKR 1.2–1.8 per km turns a 1,000 km/month commute into roughly PKR 4,000–6,000 of monthly running-cost saving, before oil, filter, clutch and valve-adjustment savings. Use the ROI calculator with your own fuel price and utilisation.
| Use case | Monthly distance | Indicative monthly saving | Payback sensitivity |
|---|---|---|---|
| Private commuting | 600–900 km | PKR 2,900–6,100 | Slower; battery choice dominates cost. |
| Daily commute + errands | 1,000–1,500 km | PKR 4,800–9,000 | Typically the 12–18 month range cited locally. |
| Delivery / commercial | 1,800–2,500 km | PKR 8,600–15,000 | Fastest payback; uptime and spare parts matter most. |
Illustrative ranges using the assumptions above; they are not a guarantee of savings or payback.
For workshops, importers and fleet operators
If you are building more than one bike, the specification process changes: you need repeatable fitment, consistent controller firmware, a spare-parts pipeline and a warranty workflow. We support that with sample units, OEM branding, controller parameter locking, CKD/SKD supply and — for larger programmes — production line equipment and setup assistance.
Conversion kit importer programme → · OEM / ODM services → · Factory strength, CE certification and QC →
CG125 electric conversion — frequently asked questions
What motor and battery suit a CG125 electric conversion?
The CG125 frame handles a larger drivetrain than a 70cc bike. A common performance build is a 3000W 72V hub motor with a 40Ah-class battery and a programmable FOC sine-wave controller. For lower-cost city use, 1500–2000W at 60V is sufficient. Choose continuous controller current and battery BMS discharge rating together, not peak wattage alone.
Will a hub motor fit the original CG125 wheel?
Most CG125 variants use 18-inch spoked wheels. A spoke hub motor can be laced into the original rim, which preserves the frame, fork and brake geometry. Rim diameter, spoke count, dropout width, axle diameter and brake plate clearance must be measured on the actual bike before ordering because locally assembled variants differ.
How much does a CG125 electric conversion cost in Pakistan?
Publicly advertised Pakistani workshop packages in 2026 were commonly tiered around PKR 85,000, PKR 150,000 and PKR 250,000 depending on motor power and battery chemistry, with a 3000W 72V 40Ah performance package in the upper tier. Retail 3000W 72V hub motors were listed around PKR 44,900–65,000. These are market reference points; factory quotations for kits and bulk orders are issued on request.
Can a converted CG125 carry a pillion passenger and climb hills?
Yes, but sustained load is a thermal question. Specify a motor winding for torque rather than top speed, a controller with adequate continuous current, and a battery whose BMS can supply that current without sag. High-torque single-shaft and spoke hub motors are commonly chosen for load-carrying three-wheeler and cargo builds.
Is a CG125 conversion reversible?
A bolt-in conversion that keeps the original rim lacing style, uses a removable battery cradle and avoids cutting the frame can in principle be reversed. Keep the original engine, wheel and wiring harness. Conversions that weld brackets or modify the loom are not easily reversible.
Do you provide CKD or SKD kits for Pakistani assemblers?
Yes. Wuxi Sine Power supplies complete kits as well as CKD/SKD configurations for local assembly, together with OEM branding, controller parameter tuning, spare parts and production-line equipment. See the conversion kit importer programme for MOQ and scope.
What is the lead time for a sample CG125 kit?
Standard models typically ship in 7–15 days. Custom windings, branding or battery configuration add engineering and validation time. Confirm the current schedule with the Lahore team when requesting a sample.
Which controller should be used with a 72V 3000W CG125 build?
Use a programmable 72V FOC sine-wave controller with a continuous current rating matched to the motor and a battery BMS able to supply it. Pakistani conversion guides commonly reference 72V 45A sine-wave controllers for 1500W-class builds; 3000W builds need a higher continuous rating. See our controller matching guide for the sizing method.
Send the bike details, get a matched specification
Model year, rim size, daily distance, payload and quantity are enough to start. We will reply with motor, controller, battery and harness options plus sample lead time and a factory quotation.
Wuxi Sine Power Technology Co., Ltd. · Wuxi, Jiangsu, China · Lahore, Pakistan team · About the Lahore team. Price and package figures are publicly listed Pakistani retail/workshop benchmarks observed November 2026 and are indicative, not an offer. Registration, homologation and road-use rules vary; confirm with the relevant local authority before converting.