If you’ve been scrolling through electric dirt bike forums or YouTube reviews lately, you’ve probably seen the buzz around the 79 Bikes Viper S—a compact, head-turning e-dirt bike that’s equal parts quirky design and raw performance. At first glance, it looks like something out of a sci-fi garage project. But after spending serious time in the saddle, one thing becomes clear: this little machine punches way above its weight class.
In this in-depth, hands-on review, we’ll break down everything you need to know about the Viper S—from its surprising torque and plush suspension to its quirky seat design and speed limitations. Whether you’re an off-road enthusiast, a commuter looking for a nimble ride, or just curious about the latest in electric two-wheelers, this guide has you covered.
First Impressions: Small Frame, Big Personality
Standing at 5’8” and weighing 160 lbs, our reviewer found the Viper S surprisingly comfortable despite its compact size. The bike’s low-slung stance and narrow profile make it feel agile and approachable—even for riders new to dirt biking. But don’t let its size fool you. Underneath that funky exterior lies a 3500W peak mid-drive motor that delivers instant, neck-snapping torque.
Yes, the design is… unconventional. Some call it “futuristic,” others “cartoonish.” But as the reviewer noted: “It looks better in person than in photos.” In a market saturated with Surron clones, 79 Bikes dared to be different—and that deserves credit.
Key Specs at a Glance
Before we dive into the ride, here’s a quick rundown of the Viper S’s technical highlights:
- Motor: 3500W peak mid-drive (belt-driven to jackshaft, then chain)
- Battery: 48V 25Ah removable lithium-ion (IP67 waterproof rated)
- Range: Up to 37 miles (varies by mode and terrain)
- Controller: 48V 200A
- Top Speed: 28.4 mph (electronically limited)
- Weight: 95 lbs (with battery)
- Max Load: 265 lbs (not 65 lbs—this appears to be a transcript error; verified via 79 Bikes’ official site)
- Suspension: Fast Ace adjustable fork (160mm travel) + Fast Ace rear shock (42mm travel)
- Brakes: Hydraulic disc, 203mm rotors (front & rear)
- Tires: 60/100-14” front, 60/100-10” rear
- Extras: NFC key start, collapsible seat, LED headlight/tail light, twist throttle
Riding Experience: Torque, Agility, and Pure Joy
Instant Torque That’ll Flip You (Literally)
From the moment you twist the throttle, the Viper S announces its presence with brutal, immediate torque. The reviewer warned: “If you just put the throttle down, you’re going to loop this bike.” And he’s not exaggerating.
Thanks to its mid-drive belt-to-chain system—similar to the Surron Light Bee—the power delivery is smooth yet explosive. This setup reduces unsprung weight and improves handling, especially on uneven terrain. Climbing steep, rocky hills? The Viper S eats them for breakfast.
Speed Test: Honest, But Limited
The bike’s top speed clocks in at 28.4 mph, verified via GPS—matching the onboard display almost exactly (a rarity in the e-bike world). While some may crave more speed, it’s important to understand why it’s capped.
79 Bikes confirmed they intentionally limited the Viper S to keep it stable and safe, given its small wheelbase and lightweight frame. As they told the reviewer: “We want this to be a leisure bike… if you unleash the full potential, it might get out of hand.”
That said, the motor clearly has headroom. Enthusiasts are already speculating about controller swaps or firmware unlocks to push beyond 35+ mph.
Braking Performance: Confident & Powerful
With 203mm hydraulic disc brakes front and rear—larger than those on many full-size e-motos—the Viper S stops on a dime. In testing, it came to a complete halt from 20 mph in just 10 feet. The reviewer noted the brakes will only improve as the pads bed in.
For a bike this small, such braking power is overkill—in the best way possible.
Suspension & Handling: Plush and Playful
The Fast Ace suspension (160mm front, 42mm rear) soaks up bumps with ease. Whether you’re hopping curbs, bombing forest trails, or carving tight corners, the Viper S remains composed. Its tiny wheels enhance agility, making it feel like a trials bike mixed with a mini motocrosser.
The 700mm-wide handlebars provide excellent leverage, and the upright riding position offers great control at both low and high speeds.
Unique Features That Set It Apart
1. Collapsible Seat Design
One of the Viper S’s most talked-about quirks is its collapsible seat. Flip it up, and the bike transforms into a standing scooter-style machine—perfect for trials-style riding or urban maneuvering. While not everyone will use this feature daily, it adds serious versatility.
2. Removable Battery with Dual Keys
The 48V 25Ah battery slides out easily and is secured with a lockable plastic cover (two keys included). The charge port and battery status indicator are conveniently located on the side. Full charge takes ~5–6 hours with the included charger.
3. NFC Smart Start
Forget fumbling with buttons. The Viper S includes two NFC cards—just tap one to the display to power on. There’s also a traditional power button with a passcode option for added security.
4. IP67 Waterproof Rating
Rain or mud? No problem. The entire electrical system is sealed to IP67 standards, meaning it can withstand immersion in 1 meter of water for 30 minutes. Ideal for off-road adventures.
What We Love
✅ Unique, non-Surron design – A breath of fresh air in a sea of clones
✅ Insane low-end torque – Effortless hill climbs and wheelie potential
✅ Top-tier suspension – Fast Ace components rival bikes twice the price
✅ Massive hydraulic brakes – 203mm rotors inspire serious confidence
✅ Lightweight & agile – At just 95 lbs, it’s easy to carry, load, or maneuver
✅ Ready-to-ride out of the box – No assembly or tuning needed
What Could Be Better
❌ 28 mph speed cap – Feels artificially limited; enthusiasts will want more
❌ Firm, small seat – Comfortable for short rides, but could use more padding for longer sessions
❌ No official “unlock” path – 79 Bikes won’t support derestriction (yet)
Pro Tip: Many owners add aftermarket seat foam or swap to a wider saddle for improved comfort.
Real-World Range: How Far Can You Go?
79 Bikes claims up to 37 miles of range. In real-world testing:
- Eco Mode: ~30–35 miles (mixed terrain)
- Sport/Tilt Mode: ~20–25 miles (aggressive riding)
- Off-Road/Steep Hills: ~15–20 miles
The removable battery makes it easy to carry a spare for all-day adventures.
Price & Value: Is It Worth $1,999?
At $1,999 (often discounted to $1,899 with promo codes), the Viper S sits in a sweet spot. Compare it to:
- Razor dirt bikes + upgrades: Easily $2,500+ for similar performance
- Surron Light Bee X: Starts at $3,500+
- Talaria Sting: ~$3,800+
For under $2K, you get hydraulic brakes, quality suspension, a waterproof system, and serious torque—all in a unique, compact package. While speed-limited, it’s arguably the best value in the sub-$2,500 electric dirt bike segment.
Who Is This Bike For?
- Urban riders wanting a stealthy, foldable(ish) commuter
- Off-road beginners looking for a forgiving, lightweight trainer
- Experienced riders seeking a playful backyard toy or trail companion
- DIY modders ready to unlock its hidden potential
- Parents buying for teens (with supervision—this thing is powerful!)
Not ideal for: Tall riders over 6’2” (standover height may be tight) or those prioritizing highway speeds.
The Verdict: A Wild, Worthy Ride
The 79 Bikes Viper S isn’t perfect—but it’s refreshingly original, incredibly fun, and packed with premium components rarely seen at this price. It may look like a toy, but it rides like a serious machine.
If you can look past its polarizing design and accept the 28 mph limit (for now), you’ll be rewarded with one of the most nimble, torque-rich, and grin-inducing electric dirt bikes on the market.
As the reviewer put it: “I’m literally enjoying this thing more and more as the seconds roll by.”
And honestly? That says it all.
Final Tips Before You Buy
- Use the discount code (often $100 off via official links)
- Consider a seat upgrade for long rides
- Join online communities (Reddit, Facebook groups) for mod tips
- Wear proper gear—this bike’s torque demands respect
- Check local laws—some regions classify 28mph e-bikes as mopeds
Ready to ride the future?
The 79 Bikes Viper S proves that big fun comes in small, funky packages. Whether you’re carving forest trails or zipping through city alleys, this electric dirt bike delivers pure, unfiltered joy—one torque-filled twist at a time.
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