MEPS SZ2104

What it pulls

MEPS’s own bench test, one line per prop. Drag across the chart to move the throttle; the model above follows.

What you get for $13.50

• 778.5 g on 4S

  On MEPS's 16.8 V bench the 3000KV pulls 778.5 g at full throttle on a D90 three-blade, drawing 24.5 A.

  Source: MEPS 3000KV data test

• 681.3 g on 6S

  The 1800KV pulls 681.3 g on the same prop at 25.2 V, drawing 12.5 A.

  Source: MEPS 1800KV data test

• 18 g

  Both KVs weigh 18 g including 150 mm leads.

  Source: MEPS spec table

• Uni-bell

  A 6082 aluminium uni-bell with N50H magnets, a stainless steel shaft and NMB bearings.

  Source: MEPS product page

What to pair it with

Our reading of MEPS’s numbers, so your build matches what the motor was tested with.

ESC

MEPS's peak currents are 12.5 A for the 1800KV on 6S and 24.5 A for the 3000KV on 4S; its parts list names Foxeer's Mini Reaper 45A 4-in-1 ESC (20 × 20 mm). (MEPS spec table, MEPS product page)

Props

MEPS tested a D90 three-blade and its own SZ3046 three-inch three-blade, which it recommends. (MEPS 1800KV data test, MEPS 3000KV data test, MEPS product page)

Battery

6S for the 1800KV, 4S for the 3000KV. (MEPS spec table)

Frame

Four M2 screws on a 12 mm circle. (MEPS size chart)

Where to buy

• MEPSthe maker's store; 1 motor in either KV and colour, $54 for 4
  $13.50seen Oct 19, 2026
  Visit

Plain links, not affiliate links. Prices change; the store’s page has the current one.

Full specs

Bench data

Redrawn from MEPS’s test reports. Thrust is static pull on a bench, more than you get in flight. Power is volts × amps; efficiency is thrust divided by power.

Inside the motor

A brushless outrunner: the coils stand still in the middle and the magnets spin around them. From the top down:

• Bell. 6082 aluminium uni-bell, grey with a black ("Black Grey") or red ("Red Grey") top; the top has five slotted spokes. (MEPS product page, MEPS photo)
• Magnets. N50H magnets. (MEPS product page)
• Bearings. NMB bearings. (MEPS product page)
• Shaft. Stainless steel, 1.5 mm, standing 3.55 mm above the bell, with four holes in the top round it. (MEPS product page, MEPS size chart)
• Base. Four M2 holes on a 12 mm circle. (MEPS size chart)
• Leads. 150 mm, with 10 mm of heat-shrink and 4 mm stripped ends. (MEPS size chart)

How fast it spins

KV is the motor’s no-load speed per volt. With nothing on the shaft, the 1800KV version reaches about these speeds; a prop loads the motor and brings it down, typically to around 70–75% of these figures at full throttle.

A 14-pole rotor has 7 pole pairs, so every turn of the shaft is 7 electrical cycles, and a six-step ESC switches the phases 42 times per turn.

About the 3D model

A generic outrunner drawn from MEPS’s published sizes: the 21 × 4 mm stator, 25.57 mm bell, 13.7 mm height, 1.5 mm shaft, 12 mm mounting circle and 12 teeth and 14 magnets. Anything MEPS doesn’t publish is typical for a motor this size, and the bell’s spoked top, the base and the inside are a generic design, not this motor’s. The colours are read off the maker’s product photos. There are no logos or markings: it is our drawing, not the maker’s.

Sources

1. MEPS: SZ2104 Ultralight Efficient Motor for 3-4 Inch Freestyle & Cinematic FPV Drone 1800KV/3000KV (product page, MEPS's own store). Retrieved Oct 19, 2026.
2. MEPS: SZ2104 specification table for 1800KV and 3000KV (image on the product page; its max-power column repeats the tests' full-throttle thrust, see modelNotes). Retrieved Oct 19, 2026.
3. MEPS: SZ2104 size chart (image on the product page). Retrieved Oct 19, 2026.
4. MEPS: SZ2104 KV1800 data test, 10–100% throttle with D90-3 and SZ3046-3 props at 25.2 V (image on the product page). Retrieved Oct 19, 2026.
5. MEPS: SZ2104 KV3000 data test, 10–100% throttle with D90-3 and SZ3046-3 props at 16.8 V (image on the product page). Retrieved Oct 19, 2026.
6. MEPS: SZ2104 1800KV Black Grey main product photo, used for finish and spoke count. Retrieved Oct 19, 2026.