3- to 5-inch FPV motor
Diatone Mamba TOKA 2004
A 20 × 4 mm motor for 3- to 5-inch quads, 1700KV for 4S–6S or 2900KV for 3S–4S, 17.5–18 g with leads, that pulled about 1 kg at full throttle on a GF5125 on Diatone's bench.
- 3- to 5-inch quads
- 6S (1700KV) or 4S (2900KV)
- 12 × 12 mm M2 motor mounts
The spin is an illustration: the model turns at 1/600 of the no-load speed, and it is a generic 2004 motor drawn from Diatone’s published sizes, not its exact design. No-load speed is KV × 22.2 V, a nominal pack for this version. Diatone’s bench tables for it step by thrust rather than throttle, so they are in the bench data below, not on this readout.
- Max thrust
- 996 g
- GF5125 prop, 24 V
- Weight
- 17.5 g
- with leads; 2900KV 18 g. The page's text gives 16.3 g for both.
- Peak current
- 17.5 A
- full throttle
- Max power
- 418 W
- full throttle
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What you get
About 1 kg of pull
At full throttle on a GF5125, the 1700KV pulled 996 g at 24 V (17.52 A) and the 2900KV 1,051 g at 16 V (31.63 A) on Diatone's bench.
Source: Diatone 1700KV spec sheet, Diatone 2900KV spec sheet
Two KVs
1700KV for 4S–6S and 2900KV for 3S–4S, both on a 20 × 4 mm, 12N14P stator.
Source: Diatone product page (archived)
17.5 g with leads
Diatone weighs the 1700KV at 17.5 g and the 2900KV at 18 g, both with 150 mm leads.
Source: Diatone 1700KV spec sheet, Diatone 2900KV spec sheet
240 °C windings
Diatone lists 240 °C enamelled wire for the windings.
Source: Diatone product page (archived)
What to pair it with
Our reading of Diatone’s numbers, so your build matches what the motor was tested with.
- ESC
- Diatone's maximum currents are 17.52 A for the 1700KV and 31.63 A for the 2900KV. A 25 A ESC covers the 1700KV; the 2900KV wants 35 A or more. (Diatone product page (archived), Diatone 1700KV spec sheet, Diatone 2900KV spec sheet)
- Props
- 3- to 5-inch on Diatone's spec sheets (its page says 3.5- to 5-inch). Its bench tests use a GF5125. (Diatone product page (archived), Diatone 1700KV spec sheet, Diatone 2900KV spec sheet)
- Battery
- 4S–6S for the 1700KV, tested at 24 V; 3S–4S for the 2900KV, tested at 16 V. (Diatone product page (archived), Diatone 1700KV spec sheet, Diatone 2900KV spec sheet)
- Frame
- Four M2 holes on a 12 × 12 mm pattern. (Diatone product page (archived), Diatone 1700KV spec sheet)
Where to buy
- GetFPV1700KV or 2900KV; out of stock$16.99seen Oct 19, 2026Visit
- RaceDayQuads1700KV; out of stock$16.99seen Oct 19, 2026Visit
- Unmanned Tech1700KV or 2900KV; out of stockprice on the store’s pageVisit
Plain links, not affiliate links. Prices change; the store’s page has the current one.
Full specs
| Spec | Value | Source |
|---|---|---|
| KV | 1,700 rpm/V (also 2900KV) | Diatone product page (archived) |
| Stator | 20 × 4 mm (2004) | Diatone product page (archived) |
| Configuration | 12N14P (12 stator slots, 14 magnet poles) | Diatone product page (archived), Diatone 1700KV spec sheet, Diatone 2900KV spec sheet |
| Battery | 4S–6S LiPo (16.8–25.2 V) for 1700KV (2900KV: 3S–4S (12.6–16.8 V)) | Diatone product page (archived) |
| Weight | 17.5 g (with leads; 2900KV 18 g. The page's text gives 16.3 g for both.) | Diatone 1700KV spec sheet, Diatone 2900KV spec sheet |
| Dimensions | Φ26.2 × 15.3 mm; 13.7 mm without the shaft | Diatone product page (archived), Diatone 1700KV spec sheet |
| Shaft | 3 mm; the prop mounts on a 1.5 mm stub standing 1.6 mm above the top, which has two M2 holes on a 5 mm circle | Diatone product page (archived), Diatone 1700KV spec sheet |
| Mounting | 4 × M2 on 12 × 12 mm | Diatone product page (archived), Diatone 1700KV spec sheet |
| Bearings | 7 × 3 × 3 mm | Diatone product page (archived) |
| Winding | 240 °C high-temperature enamelled wire | Diatone product page (archived), Diatone 1700KV spec sheet |
| Internal resistance | 210 mΩ (2900KV 90 mΩ; the spec sheets print the unit as Ω) | Diatone product page (archived) |
| Idle current | 0.3–0.8 A at 10 V (2900KV 0.9–1.5 A at 10 V) | Diatone product page (archived) |
| Peak current | 17.52 A (2900KV 31.63 A) | Diatone product page (archived), Diatone 1700KV spec sheet |
| Max power | 418.1 W (2900KV 504.5 W on its spec sheet (S3); the page's text repeats 418.1 W) | Diatone product page (archived), Diatone 1700KV spec sheet |
| Leads | 24 AWG silicone wire, 150 mm | Diatone product page (archived), Diatone 1700KV spec sheet |
Bench data
Redrawn from Diatone’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.
1700KV on 4S–6S, 24 V1 prop
| Prop | Step | Current (A) | Thrust (g) | Efficiency (g/W) | RPM | Power (W) |
|---|---|---|---|---|---|---|
| GF5125 | 1.14 | 100 | 3.67 | 9431 | 27.22 | |
| 2.32 | 200 | 3.61 | 13891 | 55.43 | ||
| 3.66 | 300 | 3.43 | 16501 | 87.45 | ||
| 4.95 | 400 | 3.38 | 18325 | 118.28 | ||
| 6.46 | 500 | 3.24 | 20124 | 154.48 | ||
| 8.23 | 600 | 3.05 | 21902 | 196.74 | ||
| 11.79 | 700 | 2.48 | 24138 | 281.86 | ||
| 14.51 | 800 | 2.31 | 25926 | 346.81 | ||
| 15.89 | 900 | 2.37 | 27121 | 379.73 | ||
| Max | 17.52 | 996 | 2.38 | 27777 | 418.1 |
Source: Diatone 1700KV spec sheet
2900KV on 3S–4S, 16 V1 prop
| Prop | Step | Current (A) | Thrust (g) | Efficiency (g/W) | RPM | Power (W) |
|---|---|---|---|---|---|---|
| GF5125 | 1.49 | 100 | 4.19 | 8734 | 23.87 | |
| 3.48 | 200 | 3.59 | 13454 | 55.71 | ||
| 6.04 | 300 | 3.1 | 16505 | 96.62 | ||
| 8.84 | 400 | 2.83 | 18909 | 141.36 | ||
| 11.36 | 500 | 2.75 | 20540 | 181.7 | ||
| 14.2 | 600 | 2.64 | 22193 | 227.24 | ||
| 17.42 | 700 | 2.51 | 23751 | 278.71 | ||
| 21.17 | 800 | 2.36 | 25127 | 338.68 | ||
| 24.92 | 900 | 2.26 | 26504 | 398.65 | ||
| Max | 31.63 | 1,051 | 2.09 | 28571 | 504.5 |
Source: Diatone 2900KV spec sheet
Inside the motor
A brushless outrunner: the coils stand still in the middle and the magnets spin around them. From the top down:
- Shaft. 3 mm; the prop mounts on a 1.5 mm stub standing 1.6 mm above the top, which has two M2 holes on a 5 mm circle. (Diatone product page (archived), Diatone 1700KV spec sheet)
- Stator. The coils are wound on a stack of thin steel laminations: 20 × 4 mm (2004). (Diatone product page (archived))
- Winding. 240 °C high-temperature enamelled wire. (Diatone product page (archived), Diatone 1700KV spec sheet)
- Bearings. 7 × 3 × 3 mm. (Diatone product page (archived))
- Base. 4 × M2 on 12 × 12 mm. (Diatone product page (archived), Diatone 1700KV spec sheet)
How fast it spins
KV is the motor’s no-load speed per volt. With nothing on the shaft, the 1700KV 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.
| Battery | Volts | No-load rpm (KV × V) | Electrical frequency | ESC steps per second |
|---|---|---|---|---|
| 4S nominal | 14.8 | 25,160 | 2,935 Hz | 17,612 |
| 4S full | 16.8 | 28,560 | 3,332 Hz | 19,992 |
| 6S nominal | 22.2 | 37,740 | 4,403 Hz | 26,418 |
| 6S full | 25.2 | 42,840 | 4,998 Hz | 29,988 |
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 Diatone’s published sizes: the 20 × 4 mm stator, 26.2 mm bell, 13.7 mm height, 1.5 mm shaft, 12 mm mounting circle and 12 teeth and 14 magnets. Anything Diatone 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
- Diatone: MAMBA TOKA 2004 1700KV/2900KV Racing Motor Green (product page on Diatone's own store, Wayback Machine copy captured 2025-07-19; the live page now returns 404). Retrieved Oct 19, 2026.
- Diatone: TOKA 2004-1700KV drawing, specification and test data at 24 V on a GF5125 (image on the product page). The throttle column is left out because the speeds contradict it, so the rows are thrust steps; the last row is Diatone's 100%.. Retrieved Oct 19, 2026.
- Diatone: TOKA 2004-2900KV drawing, specification and test data at 16 V on a GF5125 (image on the product page). The throttle column is left out because the speeds contradict it, so the rows are thrust steps; the last row is Diatone's 100%.. Retrieved Oct 19, 2026.
- Diatone: MAMBA TOKA 2004 main product photo (1700KV), used for finish. Retrieved Oct 19, 2026.