Is this a good first gas dirt bike for a child?

Yes, if your child has outgrown electric ride-ons and has a safe off-road place to ride. The automatic transmission and throttle limiter make learning easier, but a 50cc two-stroke still demands adult supervision.

What age or size is it for?

It is sized for kids roughly 8 to 13, depending on height and weight. Check that your child can reach the bars and touch the ground, and keep the throttle restricted until they are confident.

Does it need mixed fuel?

Yes. The 50cc two-stroke engine runs on gasoline mixed with two-stroke oil, so you must premix at the ratio in the manual. Running plain gas will damage the engine.

Top speed is about 25 mph, which is quick for a beginner. The restrictable throttle lets you lower that until your child is ready.

Does it come assembled?

It typically arrives mostly assembled but needs the bars, front wheel and some hardware fitted, plus a carburetor check. Expect an hour or two of setup before the first ride.

Can it be ridden in wet conditions?

It is built for wet and dry dirt use, but avoid deep water and wash it down and dry it after muddy rides to protect the chain, brakes and bearings.

What do buyers say about the MotoTec Thunder 50cc 2-Stroke Kids Gas Dirt Bike Blue?

Rated 3 out of 5 from 2 ratings.

Where can I buy the MotoTec Thunder 50cc 2-Stroke Kids Gas Dirt Bike Blue?

3 stores we checked sell it, including Walmart, eBay, Newegg.

MotoTec Thunder 50cc 2-Stroke Kids Gas Dirt Bike Blue

Q: Where is the MotoTec Thunder 50cc 2-Stroke Kids Gas Dirt Bike Blue cheapest?

At eBay, for $299.00, 26% under what the other stores charge, as of our latest check.

Best price now

$299.00at eBayChecked Nov 9

26% under what the other stores charge

Compared across 3 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission.

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What reviewers say

Owners of 50cc mini dirt bikes like this generally like the real suspension, sturdy frame and easy automatic riding, and call it a good step up from electric toys. Common complaints center on two-stroke upkeep, hard pull starts and setup or carburetor tuning needed before first rides.

What people mention

EngineMixedRiders like the peppy 50cc two-stroke but note it needs pre-mixed fuel and more upkeep than a four-stroke.
SuspensionPraisedOwners say the front forks and rear shock give a smoother ride than typical budget minis.
StartingCriticisedThe pull start can be stiff, particularly on a cold engine, which frustrates smaller kids.
SetupCriticisedBuyers report assembly and carburetor tuning are often needed before the bike runs cleanly.
Speed controlPraisedThe restrictable throttle is valued for easing beginners into riding.

About the MotoTec Thunder 50cc 2-Stroke Kids Gas Dirt Bike Blue

The MotoTec Thunder 50cc Kids Dirt Bike - The perfect kids starter dirt bike. The latest generation of 50cc mini bike engines are faster, torquier, more reliable and even easier to set up and start than ever before. Easy pull start, improved carburetor and all of the standard safety features, support and reliability MotoTec provides. Suitable for both wet and dry conditions. This bike will offer hours of fun in almost any children’s outdoor environment. Built Solid, this bike can handle any off-road riding. A Chromalloy frame, with the ability to bear your child’s weight as they grow, and real outdoor rubber tires separate this bikes from similar products. Responsive acceleration, front telescopic forks, rear mono shock suspension, disk brakes, motocross styling and big bike attitude, makes this the perfect children’s choice. Simple to ride, it's fully automatic, so just twist the throttle and go. All Mini Dirt Bikes are not the same. You should be aware of the build quality and parts quality is very important to how much maintenance is required. This Dirt Bike has been specified for quality and reliability, improvements specified over standard Dirt Bikes include – Higher Grade Wheel Bearings - Longer Wearing Tires - Higher Grip Tires - High-Quality Suspension for smoother ride - High-Grade Easy Start Engine Pull Cord - Chromoly steel frame - Restrictable throttle for speed control - Safety and Design - CE and EPA approved. Specs: Motor: 50cc 2-Stroke, Air Cooled (Competition Use Only) Gas/Oil Mixture: Unleaded/25:1 ratio Bore x Stroke: 44.02mm x 33.2mm Rated Output: 2.4 hp @ 7,000 rpm Engine Start: Pull Start Gas Tank: 1.6 Liter Top Speed: 25 mph (adjustable speed limiter) Cruising Range: 10+ miles per tank Safety: Throttle Limiter Transmission: Auto Centrifugal Chain: 11T/54T - T8F Size Carburetor Jet: 2.00mm (main) and 0.67mm Recommended Age: 13+ Max Rider Weight: 150 lbs Seat Height: 22 inches Frame: Steel Front & Rear Wheels: Aluminum Alloy Front & Rear Tires: 2.50-10 (15 inch diameter, 2.5 inch wide) Brakes: Front Disc, Rear Disc Suspension: Front Inverted Fork and Rear 190.5mm Mono Shock Throttle: Variable twist-grip Seat: Padded (single rider) Handlebars: Angle Adjustable, Not Height Seat Height from Ground: 23 inches Wheelbase: 35 inches (890mm) Ground Clearance: 9 inches Assembly Required: Yes Box Size: 44x13x23 inches Box Weight: 64 lbs Dirt Bike Dimensions: 50x23x32 inches Dirt Bike Dry Weight: 54 lbs Warranty: 30 days parts replacement