The 79BIKE Viper S is a compact electric dirt bike designed to bridge the gap between modified mini-bike builds and larger Sur-Ron-style e-motos. With a 3,500W peak mid-drive motor, a removable 48V 25Ah battery, Fast Ace suspension and a 95 lb chassis, it prioritizes agility, torque and approachable recreational riding.
79BIKE Viper S at a Glance
| Price | $1,999 before available discounts |
|---|---|
| Peak Power | 3,500W |
| Battery | 48V 25Ah removable pack |
| Tested Top Speed | 28.4 MPH GPS verified |
| Weight | 95 lbs |
| Best For | Lightweight trail riding, leisure riding and wheelie practice |
WhichVolt Score
Excellent Lightweight Value
Quick Verdict
The 79BIKE Viper S is an agile, approachable electric dirt bike that delivers much more capability than its compact size suggests. Volted Adventures recorded a GPS-confirmed top speed of 28.4 MPH, strong low-end acceleration, excellent hill climbing and unusually plush Fast Ace suspension for a bike priced around $1,999.
Its 95 lb chassis is one of its biggest strengths. The bike feels stable at speed but remains easy to carve, reposition and lift into wheelies. Tilt Mode adds an extra high-torque setting for riders who want stronger front-wheel lift.
The main limitations are the electronic speed cap and the firm stock seat. Riders looking for a compact, fun, lightweight trail bike should find the Viper S compelling, while buyers wanting 40+ MPH performance should look at larger 72V platforms.
Overall Rating: 8.9/10
Key Takeaways
Best Feature
Exceptional agility and Fast Ace suspension in a 95 lb package.
Biggest Drawback
The factory controller limits top speed to approximately 28.4 MPH.
Best For
Leisure riders, lighter adult riders and wheelie-focused users.
Avoid If
You need higher-speed e-moto performance or a plush long-distance seat.
Why Trust WhichVolt?
- Independent written analysis
- Based on original YouTube field testing
- Source-derived specifications and observations
- Affiliate relationships do not determine ratings
Review Source
- Reviewer: Volted Adventures
- Original Review: Watch the Viper S review on YouTube
- Official Product Page: 79BIKE Viper S
- Review Type: Technical field test and off-road ride evaluation
Watch the Original 79BIKE Viper S Review
Watch Volted Adventures test the Viper S for speed, braking, torque, hill climbing, suspension comfort and overall agility.
79BIKE Viper S Specifications
| Specification | Details |
|---|---|
| Model | 79BIKE Viper S |
| MSRP | $1,999 |
| Peak Motor Power | 3,500W |
| Battery | 48V 25Ah removable battery |
| Controller | 48V 200A |
| Claimed Range | Up to 37 miles |
| Tested Top Speed | 28.4 MPH GPS verified |
| Drive System | Primary belt, jackshaft and 420 chain |
| Rear Sprocket | 48 tooth |
| Front Tire | 60/100-14 |
| Rear Tire | 60/100-10 |
| Front Suspension | Adjustable Fast Ace fork, 160 mm travel |
| Rear Suspension | Adjustable Fast Ace shock, 42 mm travel |
| Brakes | Hydraulic discs with 203 mm × 2.3 mm rotors |
| Weight | 95 lbs / 43 kg |
| Maximum Load | 165 lbs / 75 kg |
| Water Resistance | IP67 |
| Ignition | Passcode button or NFC card |
Best For
- Lightweight recreational trail riding
- Wheelie practice
- Riders upgrading from modified mini-bike builds
- Shorter or lighter adult riders
- Buyers who value agility over maximum speed
- Riders wanting premium suspension on a compact platform
Not Ideal For
- Riders seeking 40+ MPH performance
- Heavier riders above the stated load capacity
- Long-distance comfort-focused riding
- Buyers wanting a full-size e-moto
- Riders needing a soft, highly padded seat
GPS Speed Test
The Viper S reached a GPS-verified top speed of 28.4 MPH.
The onboard display read 28.5 MPH while the GPS recorded 28.4 MPH, making the factory speedometer exceptionally accurate.
The bike behaves as though the controller enforces a firm electronic limit. The powertrain may have additional headroom, but the source report only supports the stock 28.4 MPH result.
Eco, Sport and Tilt Modes
Eco Mode
Eco Mode reduces output for smoother riding and improved efficiency.
Sport Mode
Sport Mode provides stronger acceleration and makes better use of the 3,500W peak motor.
Tilt Mode
Tilt Mode is activated by holding the down button on the display. It delivers increased low-end torque for wheelie-focused riding.
The extra torque can lift the front wheel quickly, so riders should practice in a controlled environment.
Handling and Maneuverability
The 95 lb chassis gives the Viper S unusually agile handling.
Volted Adventures found it stable at both low and higher speeds while remaining easy to carve through turns.
The compact 14-inch front and 10-inch rear wheel combination contributes to rapid direction changes and a playful ride character.
Acceleration and Torque
Acceleration is punchy from a stop, especially in Tilt Mode.
The 48V 200A controller delivers strong low-end current, helping the bike feel more powerful than the 28.4 MPH top-speed figure alone might suggest.
This makes the Viper S especially entertaining at lower speeds and useful for technical trail sections where immediate torque matters more than top-end velocity.
Hill-Climbing Performance
The Viper S handled rough, steep gravel and dirt climbs without bogging down.
Its low weight, short gearing and strong low-end torque allow it to maintain momentum over loose and uneven terrain.
The source report does not provide a measured grade or climb speed, so no numerical hill-climb claim should be inferred.
Fast Ace Suspension
Suspension quality is one of the Viper S’s biggest advantages.
- Adjustable Fast Ace front fork with 160 mm travel
- Adjustable Fast Ace rear shock with 42 mm travel
The setup was described as plush and capable across bumpy hill climbs, loose dirt and technical off-road sections.
For a compact bike in this price range, the suspension package is unusually strong.
Brake Test
The Viper S uses front and rear hydraulic disc brakes with large 203 mm rotors that are 2.3 mm thick.
From 20 MPH, the bike stopped in approximately 10 feet.
The brakes offer immediate lever bite and enough stopping force to lock the wheels quickly.
Because the bike weighs only 95 lbs, the oversized rotors provide a strong braking margin.
Battery and Range
The Viper S uses a removable 48V 25Ah battery with an integrated charge port and battery-status indicator.
79BIKE claims up to 37 miles of range depending on mode and riding conditions.
The source report does not include a full discharge test, so the 37-mile figure should be treated as a manufacturer claim rather than an independently verified result.
Convertible Seat System
The Viper S includes a collapsible or convertible seat-bracket design.
This allows the frame to transition between a mini dirt bike layout and a more open trials- or scooter-style configuration.
The feature adds versatility, although the stock seat cushion itself was described as firm and lacking padding for longer rides.
Display, Lighting and Security
The bike includes:
- LCD display on the left handlebar
- Front headlight
- Rear tail light
- Active brake light
- Passcode power-button ignition
- Two NFC ignition cards
The dual ignition system improves convenience by allowing either passcode or NFC-card access.
Pros and Cons
Pros
- Competitive $1,999 price
- Very light 95 lb chassis
- Strong low-end acceleration
- Fast Ace front and rear suspension
- Excellent agility
- 10-foot stopping distance from 20 MPH
- Large 203 mm brake rotors
- Accurate speedometer
- Removable battery
- NFC and passcode ignition
Cons
- Top speed limited to 28.4 MPH
- Firm stock seat
- Limited maximum payload
- Not intended for buyers seeking full-size e-moto performance
Who Should Buy the 79BIKE Viper S?
The Viper S is a strong choice for riders who:
- Want a compact and highly agile electric dirt bike
- Are upgrading from a Razor or modified mini-bike build
- Prioritize suspension and torque over maximum speed
- Want a lightweight platform for wheelie practice
- Need a removable battery and simple security features
Who Should Avoid It?
- Riders who want 40–50 MPH performance
- Riders above the stated 165 lb load limit
- Buyers who need a more comfortable long-distance seat
- Riders who want a full-size electric dirt bike
Is the 79BIKE Viper S Worth Buying?
Yes, for the right rider. The Viper S combines a 95 lb chassis, strong low-end torque, excellent Fast Ace suspension and powerful hydraulic brakes at a competitive $1,999 MSRP.
Its 28.4 MPH limit means it is not a high-speed e-moto, but its agility and trail capability make it a strong bridge between modified mini-bike builds and larger electric dirt bikes.
Where to Buy
The 79BIKE Viper S is available through Amazon. Pricing, stock, delivery times and included accessories may change.
Final Verdict
The 79BIKE Viper S succeeds by focusing on agility, suspension quality and usable low-end torque rather than maximum speed.
Its 95 lb weight makes it much easier to maneuver than larger e-motos, while the Fast Ace suspension and oversized hydraulic brakes give it a premium foundation.
The electronically limited 28.4 MPH speed and firm seat are the primary compromises.
Overall Rating: 8.9/10
Recommended: Yes, for lightweight recreational and wheelie-focused riders.
Frequently Asked Questions
How fast is the 79BIKE Viper S?
Volted Adventures recorded a GPS-verified top speed of 28.4 MPH.
How powerful is the Viper S?
It uses a 3,500W peak mid-drive motor and a 48V 200A controller.
What battery does it use?
The Viper S uses a removable 48V 25Ah battery.
How much does it weigh?
It weighs approximately 95 lbs, or 43 kg.
Is the Viper S good for wheelies?
Yes. Tilt Mode increases low-end torque, and the lightweight chassis makes front-wheel lift relatively easy.
How good are the brakes?
The bike stopped from 20 MPH in approximately 10 feet during testing.
Is the Viper S suitable for adults?
The test rider was approximately 5'8" and 160 lbs. The stated maximum load is 165 lbs, so larger riders should verify fit and payload limits carefully.
What range does it have?
79BIKE claims up to 37 miles, but the source report did not include a full independent range test.
Legal and Safety Disclaimer
The Viper S may be classified as an off-road vehicle, moped, motorcycle or other motor vehicle depending on local law.
Verify licensing, registration, insurance, helmet, road-use and trail-access requirements before riding.
This article is informational and does not constitute legal advice.
Safety Notice
The Viper S delivers strong low-end torque and can lift the front wheel rapidly in Tilt Mode.
Use a certified full-face helmet, gloves, eye protection, protective clothing and appropriate riding boots.
New riders should begin in Eco Mode and practice braking, throttle control and body positioning in a controlled environment.
Review Methodology and Content Attribution
Primary Source: Volted Adventures
YouTube Channel: https://www.youtube.com/@VoltedAdventures
Original Review Video: https://www.youtube.com/watch?v=5L8s6TH5XSg
Official Product Page: https://79bike.com/products/viper-s-electric-dirt-bike
This article is an independent WhichVolt summary and analysis of the supplied review report. It does not claim that WhichVolt personally performed the original testing.
Affiliate Disclosure
This article contains Amazon affiliate links. If you purchase through one of these links, WhichVolt may earn a commission at no additional cost to you.
Affiliate relationships do not determine the article’s ratings, criticisms or final recommendation.
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