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We offer a 30-day return window on eligible items from the date of delivery. Products must be unused, in original condition, and returned in their original packaging. To start a return, contact us at support@adventuremotion.com or call (877) 834-4299. Return shipping costs may apply for non-defective items. Damaged or defective items are replaced at no cost to you.

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Yes. Adventure Motion is an authorized online dealer for all brands we carry. That means your manufacturer warranty is fully valid and protected.

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The MotoTec Alien 50cc 2-Stroke Kids Dirt Bike is a starter motocross bike for young riders moving up from electric machines. The current generation of 50cc two-stroke mini-bike engines start more easily and run more reliably than earlier versions, and a two-stroke of this displacement makes close to twice the power of an equivalent four-stroke - which is why it remains the preferred layout for a first real dirt bike.

Riding it is deliberately simple. An automatic centrifugal clutch means there are no gears to change: twist the throttle and the bike pulls away. A pull start gets the engine running, and the 1 litre tank runs a 25:1 unleaded fuel and oil mixture for 10 or more miles of riding. Top speed is 25 mph, and the rider weight limit is 130 lbs with a recommended age of 13 and up.

The chassis is built from steel rather than plastic, with telescopic forks up front and a mono shock at the rear, disc brakes at both ends and genuine outdoor rubber tires sized 12.5x10. Seat height sits at 22 inches on a padded single-rider seat, the handlebars adjust for angle, and the whole bike weighs a manageable 48 lbs dry. It copes with wet and dry conditions equally, and its motocross styling gives it the look of a full-size machine at a size a child can actually handle.

What Makes It a Good First Dirt Bike

  • Fully automatic - no clutch lever and no gear changes
  • 48 lbs dry, light enough for a child to pick up
  • 22 inch seat height suits smaller riders
  • Steel frame rather than plastic bodywork over a toy chassis
  • Real suspension and disc brakes at both ends

⚠️ OFF-ROAD USE ONLY — NOT STREET LEGAL

This vehicle is designed exclusively for recreational off-road riding and is not street legal. It is intended for use on private property, dirt trails, motocross tracks, and designated off-road riding areas only. This product is NOT classified as a transportation vehicle and may not be operated on public roads, highways, sidewalks, bike lanes, or any public-access roadway. This product does not include a VIN, title, or registration and is sold strictly as recreational off-road sporting equipment. Always wear a DOT-approved helmet and appropriate protective gear. Off-road vehicle laws vary by state — riders are responsible for reviewing and complying with all applicable local regulations.

Engine & Fuel

  • Motor: 50cc 2-stroke, air cooled (EPA approved)
  • Gas/Oil Mixture: Unleaded, 25:1 ratio
  • Engine Start: Pull start
  • Gas Tank: 1 litre
  • Transmission: Automatic centrifugal
  • Throttle: Variable twist-grip

Performance

  • Top Speed: 25 mph
  • Cruising Range: 10+ miles per tank

Chassis & Brakes

  • Brakes: Front and rear disc
  • Suspension: Front telescopic fork, rear mono shock
  • Front & Rear Tires: 12.5x10
  • Frame: Steel

Size & Fit

  • Recommended Age: 13 and up
  • Max Rider Weight: 130 lbs
  • Seat: Padded, single rider
  • Seat Height from Ground: 22 in
  • Handlebars: Angle adjustable (not height adjustable)
  • Dimensions: 42 x 27 x 28 in
  • Dry Weight: 48 lbs

In the Box

  • Carton Size: 46 x 14 x 26 in
  • Boxed Weight: 53 lbs

  • 50cc two-stroke makes nearly double the power of a same-size four-stroke
  • Automatic centrifugal clutch - twist and go, no gear changes
  • Easy pull start with an improved carburetor
  • Steel frame with telescopic forks and a rear mono shock
  • Disc brakes front and rear
  • 48 lbs dry weight and a 22 inch seat height suit young riders
  • Handles both wet and dry conditions on 12.5x10 outdoor tires
  • 25 mph top speed with 10+ miles per tank

MotoTec covers this unit with a 30-day parts-replacement warranty from the date of delivery against defects in materials and workmanship. Contact Adventure Motion support with your order number and photos of the issue to start a claim.

Normal wear items such as tires, tubes, brake pads, chains and batteries are not covered, and neither is damage from racing, jumping, collisions, improper assembly, modification, or riding beyond the rated limits.

What age is the alien dirt bike for?
Mototec recommends riders aged 13 and up, with a maximum rider weight of 130 lbs. adult supervision, a helmet and full protective gear are required whenever it is ridden.
Does the rider need to change gears?
No. the automatic centrifugal clutch handles everything - the rider twists the throttle and the bike accelerates.
What fuel does it use?
A 25:1 mixture of unleaded gasoline and two-stroke oil. running straight gasoline will damage the engine. the tank holds 1 litre, good for 10 or more miles.
How fast does it go?
Up to 25 mph, so a new rider should start in an open area under adult supervision before riding at speed.
How much assembly is involved?
Adult assembly is required out of the carton, and an adult should check the brakes, chain and fasteners before the first ride and at regular intervals.
Is it street legal?
No. this dirt bike is for off-road recreational use on private property or designated trails only.

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