The RFN Warrior SX-E15 is a $5,499 full-size electric dirt bike with up to 15kW of peak power, a swappable lithium battery, hydraulic disc brakes, long-travel suspension and RFN app tuning, built for adults and bigger riders moving up from youth e-motos. It is a good fit if you want a full-size RFN that is purpose-built for off-road, trail and MX riding.
Updated November 2026
This review sticks to what RFN and our product page actually publish. Where RFN has not listed a number for the SX-E15, such as battery capacity, range, weight or top speed, we say so instead of guessing. If you need those numbers, the closely related SX-E15 Plus has a full spec sheet, and we compare the two below.
What are the RFN SX-E15's published specs?
| Spec | RFN Warrior SX-E15 (from our product page) |
|---|---|
| Price | $5,499 |
| Colors | Black (in stock when written), Red (sold out when written) |
| Peak power | Up to 15kW |
| Motor | High-output electric motor |
| Battery | High-capacity swappable lithium |
| Drive | Chain drive |
| Ride modes | Multiple adjustable power modes |
| Suspension | Long-travel off-road |
| Brakes | Hydraulic disc, front and rear |
| Connectivity | RFN app control |
| Intended use | Trail, MX, off-road |
| Range, weight, top speed, seat height, battery voltage/Ah | Not published on the product page |
One more line from RFN matters: the SX-E15 is not an electric-assisted bicycle and is subject to applicable motor vehicle laws. See our Utah electric dirt bike laws guide before you plan to ride anywhere but private land or OHV areas.
What is the SX-E15 actually like to own?
RFN builds the SX-E15 as a full-size chassis, which means more room and stability than a youth bike, paired with up to 15kW of peak power. The main ownership benefits are the usual electric ones, with a few specific to this model.
- Instant torque, no shifting: power comes on smoothly with no clutch or gears to manage.
- Swappable battery: RFN highlights the swappable pack, so a second battery can extend a riding day.
- App tuning: the RFN app lets riders adjust throttle response, torque and performance settings from a phone.
- Low maintenance: no oil changes, clutch work or fuel system service. Chain, brakes, tires and suspension still need regular attention.
Who is the RFN SX-E15 for?
RFN and our product page list these riders as the target:
- Riders moving up from youth e-motos who have outgrown an SX-E5 or SX-E8.
- Adults wanting a full-size electric dirt bike rather than a compact pit-bike-style e-moto.
- Trail riders who want instant torque with less maintenance.
- Motocross riders who want to try a next-generation electric platform.
If you are shopping for a teen, our best electric dirt bikes for teens guide covers the smaller RFN models in more detail.
How does the SX-E15 compare to the SX-E15 Plus and SX-E8?
The SX-E15 sits between RFN's mid-size SX-E8 and the fully specced SX-E15 Plus. We only list numbers the product pages publish.
| Spec | SX-E8 | SX-E15 | SX-E15 Plus |
|---|---|---|---|
| Price | $3,599 | $5,499 | $5,649 |
| Peak power | 8kW | Up to 15kW | 15kW |
| Battery | 60V 35Ah (2,100Wh) | Swappable lithium (capacity not listed) | 74V 40Ah (2,960Wh), hot-swappable |
| Top speed (manufacturer) | Up to 53 MPH | Not listed | Up to 62 MPH |
| Range (manufacturer claim) | Up to 37 miles | Not listed | Up to 50 miles |
| Wheels | 14"/12" | Not listed | 21"/18" |
| Seat height | 29.3" | Not listed | 36" |
| Weight | About 128 lbs | Not listed | About 198 lbs |
Just $150 separates the SX-E15 and SX-E15 Plus, and the Plus has a complete published spec sheet. If published range and top speed matter to you, look at the SX-E15 Plus too. If you want something smaller and lighter, the SX-E8 is $3,599.
What are the SX-E15's pros and cons?
- Pro, full-size chassis: more room and stability for adults and bigger riders.
- Pro, swappable battery: it is easy to bring a second pack for longer days.
- Pro, app tuning: you can soften power for a newer rider or sharpen it for track days.
- Con, thin published spec sheet: range, weight, top speed and seat height are not listed on the product page, so plan to sit on one in person.
- Con, not street-legal as an e-bike: RFN states it is subject to motor vehicle laws.
How does the SX-E15 compare to other full-size e-motos we carry?
If you are cross-shopping, the Rerode R1+ is $4,250 with 17kW peak and a 72V 40Ah battery on a lighter compact platform. The Rerode RX is $6,200 with 35kW peak and 21"/18" wheels. Our Rerode R1 vs R1+ guide covers the compact Rerodes. For the wider picture, see how to choose the right electric dirt bike or our guide to RFN electric dirt bikes.
Where can you see the RFN SX-E15 in Utah?
You can see it at BHive Moto in West Jordan. Come sit on the RFN Warrior SX-E15, compare it to the Plus, and ask us about setup. We assemble, set up and service RFN bikes at our service center. See the full lineup in our electric motorcycles collection.
What should you check when you see an SX-E15 in person?
Because RFN publishes fewer numbers for the SX-E15 than for the Plus, a quick in-person check is worth the trip.
- Seat height and reach: sit on it in your boots and make sure you can get a foot down comfortably.
- Weight feel: lift the bike off the stand and push it around the floor to judge how it'll handle when you pick it up on a trail.
- Battery swap: ask us to demo removing and installing the pack.
- App setup: we can help you pair the RFN app and pick a softer power setting for your first rides.
- Suspension sag: set it for your weight before your first ride. We can do it during setup.
What maintenance does the SX-E15 need?
The SX-E15 uses a chain drive and hydraulic disc brakes, so plan on regular chain cleaning, lubing and tension checks, brake pad and fluid checks, tire pressure and spoke checks, and suspension care. Our Utah e-moto pre-ride checklist covers the basics, and we handle the bigger jobs at $95/hr electric labor.
BHive Moto · 5243 Wells Park Rd. #301C, West Jordan, UT 84081 · (385) 237-3341 · Mon-Fri 9AM-7PM. Service labor is $95/hr for electric and $125/hr for gas. Book at the BHive Service Center.
Shop the bikes in this post
- RFN Warrior SX-E15: $5,499 (Black in stock; Red sold out)
- RFN Warrior SX-E15 Plus: $5,649
- RFN Warrior SX-E8: $3,599
Financing is available: Affirm monthly payments are offered at checkout on bhivemotoshop.com. See our financing page for details.
Frequently asked questions
How much is the RFN SX-E15?
The RFN Warrior SX-E15 is $5,499 at BHive Moto. Black was in stock and red was sold out when we wrote this.
How powerful is the RFN SX-E15?
The SX-E15 makes up to 15kW of peak power, according to RFN. It uses a chain drive and multiple adjustable power modes.
What is the RFN SX-E15's range?
RFN does not publish a range figure on our SX-E15 product page, so we do not quote one. The SX-E15 Plus is rated by the manufacturer for up to 50 miles.
Is the RFN SX-E15 street legal?
No, not as an e-bike. RFN states it is not an electric-assisted bicycle and is subject to applicable motor vehicle laws.
SX-E15 or SX-E15 Plus?
Pick the SX-E15 Plus if you want published specs like a 74V 40Ah battery, 62 MPH and 50-mile manufacturer range for $150 more. Otherwise, sit on both in the shop.