Spektrum
Firma 4000Kv Brushless Motor
Firma 4000Kv Brushless Motor
SKU:SPMXSM1400
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Spektrum Firma 4000Kv is a brushless motor for surface RC applications using 2S LiPo power. It uses a 4-pole rotor design, 4000Kv rating, 36 mm (1.42 in) diameter motor can, 3.175 mm (1/8 in) output shaft and 4 mm male bullet connectors.
Included
(1) Firma 4000Kv Brushless Motor
Features
Brushless motor for surface RC applications
Compatible with 2S LiPo power
4-pole rotor design
4000Kv rating
4 mm male bullet connectors
Requires an 85A ESC
Specifications
Motor type: Brushless
Kv rating: 4000Kv
Input voltage: 2S LiPo, 8.4 V
Maximum continuous current: 40 A
Current at 8 V: 4.0 A ± 1.0 A
Output: 625 W on 2S
Efficiency: 81%
Number of poles: 4
Connector type: 4 mm male bullet
Motor diameter: 36 mm (1.42 in)
Motor length: 52 mm (2.05 in)
Weight: 210 g (7.41 oz)
Shaft diameter: 3.175 mm (1/8 in)
Shaft length: 15 mm ± 0.5 mm (0.59 in ± 0.02 in)
Motor cable length: 120 mm ± 10 mm (4.72 in ± 0.39 in)

Frequently Asked Questions
When will my order be shipped?
Orders placed before our daily cut-off time are usually shipped the same or next working day.
You’ll receive tracking details as soon as the courier collects your parcel.
How long will delivery take?
South African deliveries typically arrive within 1–3 working days, depending on your location.
International delivery times vary based on the destination.
Can I collect my order?
Yes. Collection is available from our Somerset West warehouse during business hours.
Where are you based?
We’re based in Somerset West, Cape Town, South Africa, and ship throughout South Africa and worldwide.
Do you ship worldwide?
Yes — we offer worldwide shipping.
What payment methods do you accept?
We accept secure online payments, including card payments, instant EFT, PayPal, and other major South African payment methods.
In-store card payments are available via Yoco.
Will I receive a tracking number?
Yes. Tracking information is emailed automatically once your order has been dispatched.
Do the products include a warranty?
Most items include a manufacturer-backed warranty.
Warranty terms vary by brand and product type.
Is my order safely packaged?
All items are securely packaged to minimise the risk of damage during transit.
Can I change or cancel my order?
If your order hasn’t been shipped yet, we can usually assist with changes or cancellations.
Please contact us as soon as possible.
Do you offer dealer or wholesale pricing?
Yes — eligible retailers can apply for a dealer account.