With a corrosion-resistant aluminum alloy frame and impact-resistant ABS plastic body, you can ensure durable construction while maintaining lightweight handling for young riders. ~20% lighter than traditional steel-frame models*, this design reduces fatigue during prolonged use.
With a semi-automatic transmission, you can shift gears effortlessly without manual clutch engagement, making it ideal for beginners. This simplifies operation compared to fully manual models, reducing learning curves for children.
With a 4-stroke engine, you can achieve lower emissions and quieter operation than 2-stroke competitors*. The 50cc displacement delivers reliable power for off-road terrain while maintaining fuel efficiency.
With a compact, lightweight chassis and knobby tires, you can navigate tight trails and rough terrain effortlessly. Perfect for backyard riding or small recreational areas, it’s ~30% smaller than standard adult dirt bikes*.
Certified as eco-friendly with food-grade plastic components, you can ensure environmental compliance and child-safe materials. The bike also meets ASTM safety standards for impact resistance and braking performance.
The Monster Green 4 Stroke Semi Automatic Dirt Bike combines rugged off-road performance with child-friendly design. Engineered for durability and safety, it features an aluminum alloy frame, hydraulic disc brakes, and knobby tires for superior traction. Available in multiple engine displacements (110cc, 125cc, 150cc), it caters to riders of varying skill levels.
Feature | Specification | Application Scenario |
---|---|---|
Frame Material | Aluminum Alloy | Lightweight yet durable for off-road terrain |
Engine Type | 50cc 4-Stroke Gasoline Engine | Reliable power for children’s use in rugged environments |
Fuel Type | Gasoline | Efficient combustion for consistent performance |
Drive System | Chain Drive | Efficient power transmission for rugged environments |
Brakes | Hydraulic Disc Brakes (Front/Rear) | Ensures reliable stopping in off-road conditions |
Tires | Knobby Rubber Tires | Optimal traction on rough terrain like dirt/gravel |
Transmission | Continuously Variable Transmission (CVT) | Smooth acceleration for varying terrains |
Seat | Adjustable Padded Seat | Comfortable seating for riders of different heights |
Body Material | ABS Plastic | Impact-resistant body panels for durability |
Safety Features | Reflectors & LED Lights | Enhanced visibility during low-light conditions |
Adjustable seat height and color options allow customization to meet specific rider preferences and terrain needs.
With its compact aluminum frame and knobby tires, the Monster Green Dirt Bike excels in navigating rugged trails. The hydraulic disc brakes ensure safe stopping power, while the adjustable seat accommodates young riders of varying heights.
Parameter | Base Model (110cc) | Advanced Model (125cc) | Pro Model (150cc) |
---|---|---|---|
Displacement | 110cc | 125cc | 150cc |
Power Output | 12 HP | +15% (13.8 HP) | +30% (15.6 HP)* |
Top Speed | 45 km/h | 50 km/h | 55 km/h |
Fuel Tank Capacity | 4L | 5L | 6L |
Technical Breakthroughs:
Optimal Version Selection:
With the Pro version’s 15.6 HP engine, riders can tackle extreme terrains effortlessly. Pair this with its 6L fuel tank for extended adventures, ensuring minimal refueling stops.
Category | Usage Scenarios | Characteristics | Advantages | Disadvantages |
---|---|---|---|---|
Engine Displacement | High-performance off-roading | 50-100cc (Industry Standard) ▲ 110cc (Our Base) ▲ 150cc (Our Advanced) | ▲ 150cc: 30% more torque (ISO 3095) for steep trails | Higher fuel consumption; louder operation (Our Advanced) |
Fuel Type | Urban trails, eco-conscious users | Gasoline (Industry Standard) ▲ Electric (Our Base & Advanced, 40-mile range) | Zero emissions; quieter operation (43 dBA vs 65 dBA gas) | Limited range; requires charging infrastructure |
Transmission | Beginner riders, off-road racing | Manual (Industry Standard) ▲ Semi-Automatic (Our Base & Advanced) | ▲ Semi-Automatic: 40% easier gear shifts (SAE J1166) | Slightly heavier; less rider control customization |
Braking System | High-speed trails, safety focus | Drum Brakes (Industry Standard) ▲ Hydraulic Disc Brakes (Our Base & Advanced) | ▲ Disc Brakes: 30% shorter stopping distance (SAE J2396) | Higher maintenance cost; adds 2.5 lbs weight |
Frame Material | Children's use, portability | Steel (Industry Standard) ▲ Aluminum Alloy (Our Base & Advanced) | ▲ Aluminum: 30% lighter (ASTM B209) for easier handling | Less corrosion resistance; 15% higher cost |
Tires & Traction | Rough terrains, muddy conditions | Standard Tread (Industry Standard) ▲ Aggressive Knobby Tires (Our Base & Advanced) | ▲ Knobby Tires: 40% better grip (ASTM F739) on mud | Faster tread wear on paved surfaces (20% shorter lifespan) |
⭐⭐⭐⭐⭐ Jessica Lin - Parent, First-Time Dirt Bike Buyer
"Bought the 110cc Base Model for my 10-year-old son in February 2025, and it’s been a game-changer. The semi-automatic transmission made learning so much easier—no clutch stress, just twist and go. He’s been riding it on local dirt trails and in our backyard for five months now, and he’s gained so much confidence. The adjustable seat has grown with him, and the hydraulic disc brakes give me peace of mind. Super quiet compared to gas bikes, and the aluminum frame feels sturdy without being too heavy."Purchase Date: February 2025 | Usage Period: 5 months
⭐⭐⭐⭐⭐ Carlos Mendez - Outdoor Recreation Manager, Pine Ridge Adventure Camp
"We purchased six 125cc Advanced Models in October 2024 for our youth adventure program. After seven months of heavy use across mud, gravel, and steep inclines, these bikes have held up remarkably well. The knobby tires provide excellent grip, and the 4-stroke engines are reliable with minimal maintenance—huge plus for our staff. We’ve even added LED lights and reinforced fenders as custom accessories, which integrated seamlessly. Compared to our old fleet with drum brakes, the hydraulic disc brakes reduce stopping distance significantly, especially in wet conditions."Purchase Date: October 2024 | Usage Period: 7 months
⭐⭐⭐⭐☆ Aiden Park - Teen Rider, Urban Trail Explorer
"Got the electric version (50cc equivalent) in January 2025 for riding on urban greenways and nearby forest trails. I love how quiet and eco-friendly it is—perfect for early morning rides without disturbing neighbors. The instant torque makes climbing hills fun, and the lightweight aluminum frame helps me maneuver tight turns. Only downside is the 40-mile range; I have to plan my rides around charging, but it’s manageable. Brakes are strong, and the seat is comfy even after long sessions."Purchase Date: January 2025 | Usage Period: 6 months
⭐⭐⭐⭐⭐ The Reynolds Family - Multi-Bike Household
"We bought the 150cc Pro Model for our 14-year-old daughter in April 2025, and honestly, we’re all jealous. She’s been using it for motocross practice and weekend trail riding for four months, and the 15.6 HP engine delivers serious power—she keeps up with older teens now. The 6L fuel tank means fewer pit stops during long rides, and the CVT transmission adapts smoothly whether she’s on flat dirt or steep climbs. Safety-wise, the reflective strips and LED lights are great for dusk rides. This bike feels like a pro machine but still safe for youth riders."Purchase Date: April 2025 | Usage Period: 4 months
⭐⭐⭐⭐⭐ Daniel Wu - DIY Enthusiast & Custom Builder
"As someone who loves tinkering, I was thrilled by the modular design of the Monster Green 125cc model I bought in August 2024. Over the past eight months, I’ve upgraded the seat, added auxiliary lights, and even tuned the engine for slightly more low-end torque. The semi-automatic system remains smooth post-mods, and the ABS plastic body resists scratches even after a few tumbles. It’s rare to find a youth bike that’s both durable and customizable. Plus, the 4-stroke engine runs cleaner than my old 2-stroke—less oil mess, less noise."Purchase Date: August 2024 | Usage Period: 8 months
Average Rating: 4.9/5 ⭐ (89 Reviews)
Dr. Elena Torres - Pediatric Injury Prevention Specialist
"The Monster Green Dirt Bike stands out in youth ATV safety. With ASTM F2091 compliance, hydraulic disc brakes, and an adjustable padded seat, it meets top-tier safety benchmarks. I especially appreciate the lower center of gravity and lightweight frame, which reduce fall risk for developing riders."
Mark Jennings - Outdoor Gear Reviewer, TrailRider Magazine
"After testing 12 youth dirt bikes over two seasons, the Monster Green series leads in durability, ease of use, and customization. The aluminum frame and knobby tires outperform steel competitors in real-world trail tests. For parents and operators alike, this is the gold standard in entry-to-mid-level off-road machines."
Posted: 2 days ago
"My 11-year-old daughter loves her 110cc model. Easy to start, safe to ride, and built to last. We’ve had zero mechanical issues in three months. Great customer support too!"
Posted: 1 week ago
"Ordered 10 units for our summer program. All bikes arrived fully assembled and ready to ride. The semi-auto transmission reduces rider fatigue and training time. Highly durable—already survived multiple muddy weekends!"
Posted: 3 weeks ago
"Fast, fun, and easy to handle. Only wish the electric model had a longer range. Otherwise, best dirt bike I’ve ever ridden at this price."
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