Best Mid Drive Motor for E-Bike and Motorcycle Builds

#1 · Best Overall

1. BAFANG BBS02B / BBS-HD Kit

• Warranty Description: 30 days return,365 days repair or replace

Best for: Programmable conversion builders.

Why it ranks #1: Offers 500W, 750W, and 1000W options, CAN Bus control, and listed bottom-bracket fit at 68–73, 100, or 120mm.

CAN Bus technology pairs with USB programmability to give this BAFANG kit a control-focused conversion platform. Its 500W, 750W, and 1000W options let builders choose among different stated power and torque levels, while support for several bottom-bracket widths helps target a range of bicycle frames.

The listed 68–73 mm, 100 mm, and 120 mm bottom-bracket fit options help narrow compatibility before installation. CAN Bus and USB programmability make this a more configurable choice for riders who want to adjust their setup, while the listed 500W, 750W, and 1000W versions provide distinct power choices. The title lists an LCD display and makes the battery optional, so buyers can plan the conversion around their display needs and source a battery separately if required.

Skip it if you need a battery in the kit; the BAFANG BBS02B/BBS-HD B0DL5G6XWN listing also makes its battery optional.

A good match for conversion builders who value adjustable power choices and USB programming. Check your bottom-bracket width against the listed options, and account for the battery being optional when planning the complete setup.

Listed on Amazon as: BAFANG BBS02B / BBS-HD Mid Drive Motor Kit,36V/48V/52V 1000W/750W CAN Bus Ebike Conversion Kit with LCD Display, USB Programmable, Fits 68-73/100/120mm Bottom Bracket, Battery Optional

#2 · Best Torque Sensor

2. Varstrom VSM01 Kit

• Warranty Description: 1 year warranty

Best for: Natural-assist ebike converters.

Why it ranks #2: The 750W, 48V kit lists a torque sensor, 130 N·m torque, four ride modes, and assistance up to 28 mph.

A 130 N·m torque-sensor motor rated at 750W gives Varstrom’s VSM01 a clearly specified focus on responsive ebike assistance. The listing also names four ride modes and assistance up to 28 mph, while its 48V specification helps conversion shoppers identify the system voltage before comparing batteries and other electrical components.

The torque sensor and stated 130 N·m torque connect the VSM01’s assistance to pedal input while providing a concrete torque figure for buyers comparing hill-oriented conversions. Its four ride modes include throttle-only, torque-sensing assist, and walk-assist among the named options, giving riders different ways to use the system. The 750W motor and 48V specification help define the conversion’s electrical setup, while the listing identifies the package as a motor and assembly kit.

Skip it if you need a stated 1000W option and 68–73 mm bottom-bracket fit; Varstrom TSDZ16 B0FQJDTL9K lists both.

A strong fit for ebike converters who want torque-sensing assistance, multiple ride modes, and a stated 48V, 750W setup. Match the electrical system to 48V, and review frame compatibility before planning installation.

Listed on Amazon as: Vastrom VSM01 750W 48V Mid Drive Torque Sensor Motor Ebike Conversion Kit

#3 · Most Included Parts

3. BAFANG BBS02B / BBS-HD Conversion Kit

• Warranty Description: 30 days return,365 days repair or…

Best for: Accessory-focused DIY converters.

Why it ranks #3: This 500W, 750W, or 1000W kit lists a brake lever, chainwheel, throttle, speed sensor, and other conversion accessories.

Included brake levers, a thumb throttle, speed sensor, chainwheel, and bottom-bracket removal tool give this BAFANG kit a notably broad accessory list for a do-it-yourself conversion. Its 500W, 750W, and 1000W choices let builders select a stated motor output, while optional battery and LCD components leave some configuration decisions open.

The included bottom-bracket removal tool and speed sensor can help organize installation and the conversion’s basic component setup; the brake lever, thumb throttle, and chainwheel add further listed parts to the build. The kit is identified as BBS02B/BBS-HD and offers 500W, 750W, or 1000W versions. Because the battery and LCD display are optional, buyers should plan separately for those items rather than assume every listed accessory comes in the package.

Skip it if you want a listing that names USB programmability; BAFANG BBS02B/BBS-HD B0FP2HQPY7 specifies USB programmability.

A practical candidate for DIY converters who value a kit listing several installation and riding components. It suits buyers comfortable choosing optional display and battery components separately, with the BBS02B/BBS-HD model named for identification.

Listed on Amazon as: BAFANG BBS02B BBS-HD 500W 750W 1000W Mid Drive Electric Bike Conversion Kit

#4 · Broad Power Options

4. Varstrom TSDZ-2B Kit

• Warranty Description: 30 Days return time,365 days warranty…

Best for: LCD-equipped torque-sensor shoppers.

Why it ranks #4: The torque-sensor kit is listed in 500W, 750W, and 1000W versions and includes an LCD display.

A listed LCD display and torque-sensor designation distinguish Varstrom’s TSDZ-2B Z8 TSDZ16 kit within this roundup. The listing names 500W, 750W, and 1000W kit choices, while its specifications identify a 26-inch wheel size and nine speeds, useful details for shoppers comparing a conversion against their bicycle’s setup.

The LCD-display feature gives buyers a named display component to consider when planning how they want to view ride information, while the torque-sensor designation identifies the kit’s assistance approach. Its listed 500W, 750W, and 1000W options offer a choice of output, and the 26-inch wheel and nine-speed specifications provide concrete bicycle details to compare with a planned build. The supplied facts do not state a bottom-bracket range, so frame-fit information is not established here.

Skip it if you need an explicitly stated 68–73 mm bottom-bracket fit; Varstrom TSDZ16 B0FQJDTL9K lists that range.

This Varstrom kit fits shoppers comparing torque-sensor options who value a listed LCD display and have a 26-inch, nine-speed setup. Treat frame compatibility as a separate check because the supplied specifications do not give a bottom-bracket range.

Listed on Amazon as: TSDZ-2B Z8 TSDZ16 500W 750W 1000W Torque Sensor Mid Drive Kit

#5

5. Varstrom TSDZ2B Z8 TSDZ16 Kit

Best for: Clutch-focused TSDZ2B upgraders.

Why it ranks #5: This kit offers 48V versions from 250W through 1000W; the listed TSDZ16 configuration reaches 160 N·m and 60 km/h.

A bidirectional free-wheeling clutch is the key upgrade in this Varstrom TSDZ2B Z8 TSDZ16 listing, which says it enables cycling under motor-out power without drag from traditional one-way clutches. A 1T4 main wiring harness and Tong-sheng display-protocol compatibility add concrete connection details for planning a compatible setup.

The bidirectional free-wheeling clutch is described as allowing motor-out power cycling without the drag associated with traditional one-way clutches, making it relevant to riders who may pedal without motor assistance. The 1T4 main wiring harness supports versatility across displays using the Tong-sheng communication protocol, which helps buyers plan their display connections. The listing also cites improved contact strength and a 15% increase, but does not specify a bottom-bracket range in the supplied facts.

Skip it if you need a stated 68–73 mm bottom-bracket fit; Varstrom TSDZ16 B0FQJDTL9K provides that range.

A suitable option for TSDZ2B-family upgraders who value motor-out pedaling and Tong-sheng-protocol display connections. Check frame compatibility separately, because the supplied listing does not state a bottom-bracket range.

Listed on Amazon as: TSDZ2B Z8 TSDZ16 48V 250W 500W 750W 1000W Mid Drive Kit for Ebike

#6 · Highest Listed Torque

6. Varstrom TSDZ16 Kit

• Warranty Description: 30 days return,365 days repair or replace

Best for: Torque-sensing commuters.

Why it ranks #6: Its 48V, 1000W torque-sensor configuration lists 160 N·m, but the stated bottom-bracket fit is limited to 68–73mm.

A 160 N·m torque rating is the clearest draw of Varstrom’s TSDZ16, a 48V, 1000W mid-drive kit for 68–73 mm bottom brackets. The title’s torque-sensor specification points toward a pedal-responsive conversion, while the stated frame-width range gives shoppers a concrete compatibility check before they begin planning an installation.

The 68–73 mm bottom-bracket specification gives owners a direct way to screen frame fit before committing to a conversion. Its 48V, 1000W rating and listed 160 N·m torque identify this as a high-output option among the supplied specifications, while the torque-sensor designation distinguishes its assistance approach from kits without that stated feature. Varstrom describes the TSDZ16 as fitting all riding scenarios, but the supplied details do not specify included accessories or display choices, so check those against your build requirements.

Skip it if you need listed compatibility with 100 or 120 mm bottom brackets; BAFANG BBS02B/BBS-HD B0FP2HQPY7 lists those widths.

Consider this Varstrom kit for a torque-sensor conversion when your frame has a 68–73 mm bottom bracket and you want its stated 48V, 1000W specification. The supplied listing does not detail included accessories.

Listed on Amazon as: TSDZ16 160N.m 48V 1000W Torque Sensor Mid Drive Kit for 68-73mm BB

#7

7. UVHAHSIXK QS 138 Motor

Best for: Programmable electric-motorcycle builders.

Why it ranks #7: The 3000W QS 138 motor and controller suit custom vehicle builds, but the listing is less clearly an e-bike conversion kit.

The QS 138 70H pairs a 3000W rated motor with an ND72450 controller, giving custom vehicle builders a motor-and-controller combination rather than a standalone bicycle conversion kit. Its description lists a programmable Bluetooth component and sprocket or belt variants, providing useful choices for a project that needs controller setup and drivetrain planning.

The description lists 3000W rated power, 10kW peak power, and 45–55 N·m maximum torque, giving builders several distinct performance figures to consider for a project. A supplied ND72450 controller and function harness provide the named control hardware, while the Bluetooth programming component supports setup work. The title specifies sprocket type, but the description also mentions belt or sprocket type; confirm which variant is being selected before planning the drivetrain and installation.

Skip it if you need a bicycle conversion kit with a stated bottom-bracket fit; Varstrom VSM01 B0GK18ZF5C is listed as an ebike conversion kit.

This package suits builders assembling a custom electric motorcycle or similar vehicle who can work with a separate controller and programming workflow. Its sprocket-type title and conflicting belt-or-sprocket description make variant selection an important fit check.

Listed on Amazon as: Mid Drive Motor 100KPH Peak QS 138 70H 3000W PMSM Mid Drive Motor with Fardriver ND72450 DC 200A Phase 450A Controller(Sprocket Type)

#8

8. Mechanivis QS138 V3 Motor

Best for: Reduced-gear motorcycle builders.

Why it ranks #8: This 3000W, 72V PMSM motor lists 1:2.35 internal reduction gears for motorcycle, moped, and dirt-bike applications.

A 1:2.35 internal reduction gear ratio is the defining detail of this Mechanivis QS138 V3 mid-drive motor, giving motorcycle and moped builders a drivetrain specification to consider early. The listing identifies it as a 3000W PMSM motor, and its description cites gear-reduction torque for steep slopes and complex terrain.

The QS138 V3’s 3000W specification and PMSM motor type help identify the core component for a custom electric motorcycle, moped, or dirtbike project. Its 1:2.35 internal reduction gears connect the motor choice to drivetrain planning, while the description says gear reduction supports torque output for steep slopes and complex terrain. The modular design is described as allowing the motor, controller, and sensor to be replaced separately, which can make component-level maintenance more targeted when those parts need attention.

Skip it if you need a package listing a controller and complete wiring; Mechanivis QS180 B0FBRQMNK8 lists both.

A fit for electric motorcycle, moped, and dirtbike builders who want a QS138 V3 with internal reduction gears. Plan the surrounding electrical components separately, since the supplied details do not list an included controller or harness.

Listed on Amazon as: Mid Drive Motor, QS138 70H 3000W V3 100kmh PMSM Mid-Drive Motor with 1:2.35 Internal Reduction Gears for Electric Motorcycle Moped Dirtbike

#9

9. GregYoung QS165 Motor

Best for: Internal-gearbox motorcycle projects.

Why it ranks #9: The 72V QS165 is described as a high-torque motorcycle and dirt-bike motor, not a complete bicycle conversion kit.

An internal gearbox is the defining feature of GregYoung’s 72V QS165 mid-drive motor, giving electric motorcycle and dirtbike builders a drivetrain element to plan around. The listing identifies a 50H PMSM motor and metal construction, with its title presenting a high-torque motorcycle-oriented application rather than a complete conversion kit.

The 72V specification and QS165-50H model name help builders identify the motor for a compatible motorcycle or dirtbike electrical project. Its internal gearbox is a practical drivetrain consideration, while the PMSM designation provides another specific motor detail for system planning. The listing identifies metal construction and includes only a mid-drive motor, so buyers should account for the rest of the vehicle’s components separately. The supplied title and description give different power figures, so neither should be treated as settled here.

Skip it if you need a listed controller and complete wiring with the motor; Mechanivis QS180 B0FBRQMNK8 names those components.

Consider this motor for a motorcycle or dirtbike build where a QS165, 72V system, and internal gearbox suit the project. It is a motor-only listing, and its power figures conflict, so plan around verified project requirements.

Listed on Amazon as: 72v Mid Drive Motor,QS165 4000W 50H PMSM Motor,High Torque Electric Motorcycle Dirt Bike Mid Drive Motor with Internal Gearbox

#10

10. Mechanivis QS180 Motor

Best for: Off-road motorcycle project builders.

Why it ranks #10: Its 8000W, 72V specification targets off-road electric motorcycles, making it the least suitable option for ordinary e-bike conversions.

An 8000W, 72V QS180 motor paired with an ND721000B controller targets electric dirtbike and off-road motorcycle projects rather than ordinary bicycle conversions. The listing also names a Bluetooth module, complete wiring, and software, giving builders specific control and setup components to account for when planning the installation.

The QS180’s stated 8000W and 72V specifications frame this as a high-output motorcycle project component, while its 110KPH title claim provides a further stated performance figure. The ND721000B controller, complete wiring, and Bluetooth module are listed with the motor, giving builders named parts for connecting and configuring the system. The product description also cites gear-reduction torque for steep slopes and complex terrain, but supplies no detailed vehicle-fit dimensions in the provided facts.

Skip it if you need a bicycle conversion kit with a stated bottom-bracket range; Varstrom TSDZ16 B0FQJDTL9K lists a 68–73 mm fit.

Best suited to builders planning an off-road electric dirtbike or motorcycle around a QS180 motor and controller package. Confirm that its vehicle requirements match your project, since the supplied listing does not provide fit dimensions.

Listed on Amazon as: QS180 90H 8000W 72V 110KPH Mid Drive Motor for Offroad Dirtbike Electric Motorcycle with ND721000B