2–3 inch toothpick motor
HappyModel EX1103S
An 11 × 3 mm, 7000KV motor for 2S–3S toothpicks: 3.8 g, a 1.5 mm shaft on two bearings, and four M2 mounting holes on a 9 mm circle, for 40–75 mm props.
- Toothpick builds on 2S–3S
- Larva X upgrade (the V2 frame takes four-hole motors)
- 40–75 mm props
The spin is an illustration: the model turns at 1/600 of the no-load speed, and it is a generic 1103 motor drawn from HappyModel’s published sizes, not its exact design. No-load speed is KV × 11.1 V, a nominal pack for this version. HappyModel publishes no bench data for it.
- Weight
- 3.8 g
from $12.99a motor at RaceDayQuads
A set of four: $51.96
Price seen Oct 19, 2026. Plain links: we earn nothing from them.
What you get for $12.99
Made for toothpicks
HappyModel says it suits toothpick builds and rates it for 40 mm to 75 mm props.
Source: HappyModel product page
Larva X upgrade
HappyModel sells it as an upgrade motor for its Larva X, and notes that the Larva X V2 frame takes four-hole motors.
Source: HappyModel product page
Four-hole base
The base takes four M2 screws on a 9 mm circle.
Source: HappyModel drawing
Two bearings
A dual-bearing design, which HappyModel says keeps it better balanced.
Source: HappyModel product page
What to pair it with
Our reading of HappyModel’s numbers, so your build matches what the motor was tested with.
- Props
- 40–75 mm props, per HappyModel. (HappyModel product page)
- Battery
- 2S–3S LiPo. (HappyModel product page)
- Frame
- Four M2 screws on a 9 mm circle; HappyModel names the Larva X V2 frame. (HappyModel product page, HappyModel drawing)
Where to buy
- RaceDayQuads7000KV; CCW only$12.99seen Oct 19, 2026Visit
- WREKD7000KV; CCW only$12.99seen Oct 19, 2026Visit
- Unmanned Tech7000KV, set of fourprice 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 | 7,000 rpm/V | HappyModel product page |
| Stator | 11 × 3 mm (1103) | HappyModel product page |
| Configuration | 9N12P (9 stator slots, 12 magnet poles) | HappyModel product page |
| Battery | 2S–3S LiPo | HappyModel product page |
| Weight | 3.8 g | HappyModel product page |
| Dimensions | φ13.5 × 16 mm (with shaft); 10 mm from the base to the top of the bell (the spec list says Φ13.5 × 15.5 mm) | HappyModel drawing |
| Shaft | 1.5 mm, protrudes 5.2 mm above the bell | HappyModel drawing |
| Mounting | 4 × M2 holes on a 9 mm circle | HappyModel drawing |
| Bearings | 2 (dual-bearing design) | HappyModel product page |
Inside the motor
A brushless outrunner: the coils stand still in the middle and the magnets spin around them. From the top down:
- Bell. The top has 11 windows round a ring of smaller holes, four of them M2, about the 1.5 mm shaft. (HappyModel drawing)
- Base. A four-armed base with an M2 hole at the end of each arm, 12 mm across the arms. (HappyModel drawing)
How fast it spins
KV is the motor’s no-load speed per volt. With nothing on the shaft, the 7000KV 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 | 103,600 | 10,360 Hz | 62,160 |
| 4S full | 16.8 | 117,600 | 11,760 Hz | 70,560 |
| 6S nominal | 22.2 | 155,400 | 15,540 Hz | 93,240 |
| 6S full | 25.2 | 176,400 | 17,640 Hz | 105,840 |
A 12-pole rotor has 6 pole pairs, so every turn of the shaft is 6 electrical cycles, and a six-step ESC switches the phases 36 times per turn.
About the 3D model
A generic outrunner drawn from HappyModel’s published sizes: the 11 × 3 mm stator, 13.5 mm bell, 10 mm height, 1.5 mm shaft, 9 mm mounting circle and 9 teeth and 12 magnets. Anything HappyModel 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
- HappyModel: EX1103S KV7000 motors upgrade for Larva X (product page, spec list). Retrieved Oct 19, 2026.
- HappyModel: EX1103S dimension drawing (image on the product page). Retrieved Oct 19, 2026.
- HappyModel: EX1103S main product photo, used for finish and to count the top's windows. Retrieved Oct 19, 2026.
- HappyModel: EX1103S side photo (on the product page), used for the colour of the base. Retrieved Oct 19, 2026.
