MotoTec Alien 50cc: Out-of-This-World Power & Safety

High-Torque 2-Stroke Performance with Adjustable Parent Speed Control

The MotoTec Alien 50cc is the premier choice for young riders ready to transition into the world of gas-powered motocross. Featuring a high-output 50cc 2-stroke engine producing 2.4 HP, the Alien offers nearly double the torque of a 4-stroke engine of the same size. Designed with a "big bike" attitude, it combines responsive acceleration with a rugged steel frame built to handle beginner trails and backyard tracks.

Safety Meets Skill Building

Parents can rest easy thanks to the integrated throttle limiter. This allows you to restrict the top speed while your child learns the basics, and unlock the full 25 MPH as their confidence grows. With a fully automatic centrifugal transmission, there are no gears or clutches to master—just twist the throttle and go!

Pro-Level Suspension & Components

• Competition-Grade Handling: Equipped with front inverted forks and a 190.5mm rear mono shock, providing superior damping for jumps and uneven terrain.

• Lightweight Aluminum Wheels: Unlike plastic alternatives, the Alien features aluminum alloy rims paired with 10" knobby tires for maximum grip in mud, dirt, or grass.

• Responsive Braking: Front and rear mechanical disc brakes offer consistent stopping power, essential for high-speed safety.

• Easy Start System: Features the latest generation pull-start and an improved carburetor for quick, reliable starting in both wet and dry conditions.

100% Online Financing Available

Launch their racing hobby today. We offer 100% online financing with instant approval at checkout. Ride now and pay in low, flexible monthly installments!

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Full Technical Specifications

Category	Detailed Specifications
Motor	50cc 2-Stroke, Air Cooled (2.4 HP @ 7,000 RPM)
Fuel Mixture	Unleaded Gas / 2-Stroke Oil (25:1 Ratio)
Starting System	Easy Pull Start
Performance	Top Speed: 25 MPH (Adjustable Limiter)
Engine Specs	Bore x Stroke: 44.02mm x 33.2mm
Safety Features	Adjustable Throttle Limiter
Transmission	Auto Centrifugal (Fully Automatic)
Drive System	11T/54T Chain - T8F Size
Suspension (Front)	Front Inverted Fork
Suspension (Rear)	190.5mm Rear Mono Shock
Brakes	Front and Rear Disc Brakes
Tires (Front/Rear)	2.50-10 (15" Diameter, 2.5" Wide)
Wheels	Aluminum Alloy Rims
Seat Height	23 Inches (from ground)
Ground Clearance	9 Inches
Max Rider Weight	150 lbs
Product Weight	54 lbs (Dry) / 64 lbs (Shipping)
Warranty	30 Days Parts Replacement

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Important Information for California Customers

Notice: This bike is for "Competition Use Only" in California. It cannot be registered with the CA DMV for green or red stickers and may only be ridden on closed courses for competition purposes. It does not meet California Emissions Standards.

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Frequently Asked Questions

How do I adjust the speed for a beginner?

The MotoTec Alien features a physical throttle limiter screw on the handlebars. By tightening the screw, you can prevent the rider from fully twisting the throttle, allowing you to set a safe maximum speed for training.

What fuel mix does this bike require?

This is a high-performance 2-stroke engine. You must mix unleaded gasoline with high-quality 2-cycle oil at a 25:1 ratio. Using the wrong mix or straight gasoline will result in engine damage.

Is any assembly required?

Yes. Typically, you will need to attach the handlebars and front wheel, check tire pressure, and ensure all bolts are tightened before the first ride.

What is the benefit of Inverted Forks?

Inverted forks (where the thicker part of the fork is at the top) reduce "unsprung weight" and increase rigidity. This provides the Alien with much more responsive steering and better handling over bumps compared to standard telescopic forks.