More from Buddy RC →SunnySky X Series V3 X4125 V3 Brushless Motors
$119.99
In stock at buddyrc.com
The SunnySky X4125 V3 is a 41mm-stator brushless outrunner offered in 420, 480 and 515KV. The listed 420KV version weighs 351g, runs on 6S with an 80-100A ESC and is rated for 2250W continuous. It suits large electric airplanes and heavy-lift builds swinging 15 to 16 inch props.
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Highlights
- KV options: 420, 480 and 515
- 41mm stator, 25mm stator thickness, 12 slots and 14 poles
- Up to 6S LiPo
- 420KV: 90A max continuous current and 2250W for 30 seconds
- Thrust tables for EOLO 15 and 16 inch props in the listing
Best for
Builders of large electric planes who want a proven 6S motor with published thrust data.
Things to consider
- Detailed specs are printed only for the 420KV version; ask the seller for the 480 and 515KV numbers.
- Requires an 80-100A ESC, a cost to add.
- The listing shows a compare-at price lower than the sale price, so ignore that figure.
Key specs
| Price | $119.99 |
|---|---|
| KV | 420 / 480 / 515 |
| Stator | 41 x 25 mm |
| Max cells | 6S |
| Weight (420KV) | 351 g |
| Max power (420KV) | 2250W / 30s |
| ESC | 80-100A |
Our take
A strong 6S motor with real test data; confirm specs for the KV you pick.
SunnySky X Series V3 X4125 V3 Brushless Motors at a glance
| Brand | Buddy RC |
|---|---|
| Price | $119.99 |
| Type | Motor |
| Options | 3 KVs |
| Availability | In stock at buddyrc.com |
| Returns | Items can be returned within 30 days of receipt with an RMA code requested by email.… |
Price check
At $119.99, the SunnySky X Series V3 X4125 V3 Brushless Motors is toward the top of Buddy RC's price range, whose 4,618 listed products run $0.25 to $9,999.
Similar items from other brands we track run $59.99 to $189.99.
Frequently asked questions
Which KV should I choose?
Lower KV swings bigger props on 6S. The listing recommends 15x8 to 16x10 EOLO props for the 420KV; check the brand for the others.
What ESC does it need?
SunnySky recommends an 80 to 100 amp ESC for the 420KV version.
How much is the SunnySky X Series V3 X4125 V3 Brushless Motors?
Buddy RC lists it at $119.99 on buddyrc.com. We refresh prices throughout the day, but always confirm the final price at checkout.
What is Buddy RC's return policy?
Items can be returned within 30 days of receipt with an RMA code requested by email. Returns in new condition with original packaging have no restock fee; others are charged 10 to 20%, and shipping fees are not refunded.
How long does Buddy RC take to ship?
Orders placed before 2 p.m. EST usually ship the same business day from Columbus, Ohio, by USPS or UPS, with most packages arriving in 2 to 5 business days. Orders over $100 may ship free within the US, excluding most airplanes, and LiPo batteries ship only by UPS Ground.
Does the SunnySky X Series V3 X4125 V3 Brushless Motors come with a warranty?
Buddy RC's published warranty terms: Products older than 30 days may be exchanged under warranty but aren't eligible for a refund. Specific warranty terms aren't published in the policy text.
What options does the SunnySky X Series V3 X4125 V3 Brushless Motors come in?
KV: 420, 480, 515.
Where can I buy the SunnySky X Series V3 X4125 V3 Brushless Motors?
The SunnySky X Series V3 X4125 V3 Brushless Motors is sold directly by Buddy RC on buddyrc.com. The Shop now button on this page goes straight to the product there.
Is the SunnySky X Series V3 X4125 V3 Brushless Motors in stock?
Yes. Buddy RC lists it as in stock on buddyrc.com as of our latest check. Stock and prices refresh throughout the day.
Is Buddy RC a legit store?
Buddy RC is a strong pick for RC pilots who need specific parts, power systems or helicopter spares from a US warehouse with same-day dispatch. Skip it if you want generous returns, since shipping is never refunded and returns that aren't in new condition carry a 10 to 20% restock fee. Confirm the exact part number and motor or frame compatibility before ordering, because most of the catalog is model-specific. Our full Buddy RC review covers shipping, returns and what to check before ordering.
Is the SunnySky X Series V3 X4125 V3 Brushless Motors expensive?
At $119.99 it is toward the top of Buddy RC's range ($0.25 to $9,999 across 4,618 products), and similar items from other brands run $59.99 to $189.99.
