MotoTec Thunder 50cc 2-Stroke Kids Gas Dirt Bike

MotoTec rates the Thunder 50cc for riders 13 years and older with a maximum rider weight of 150 lbs. The 22-inch seat height suits most teens comfortably. For younger or smaller riders, MotoTec also makes the Pioneer 49cc (for ages 10+) — but the Thunder's Chromoly frame, disc brakes, and adjustable throttle limiter make it the better choice as kids grow.

No — the Thunder 50cc is for off-road and competition use only. It does not meet California emissions standards, cannot be registered for OHRV, and cannot be registered with the California DMV with a green or red sticker. California buyers can ride it only in closed-course competition. Anywhere in the US, it's intended for private property, motocross tracks, and approved off-road areas — never on public roads.

Yes — always. At minimum: DOT-approved helmet, gloves, eye protection, knee/elbow pads, and proper footwear (closed-toe boots, no sneakers). The Thunder ships without protective gear; this is the rider's responsibility before first ride. Adult supervision required for all riders under 18.

The Thunder has two layers of speed control: a throttle limiter (restricts how far the twist-grip throttle can open) and an adjustable speed limiter (caps the engine's top speed). Both are easy for a parent to dial in — start conservative for a new rider and dial up as skill grows. Top unrestricted speed is 25 MPH; with the limiter fully engaged, new riders can safely learn at 10–15 MPH.

Ships in a 64 lb box (44 x 13 x 23 inches) approximately 85% assembled. Final assembly typically takes 30–60 minutes with basic tools (included in box). Tasks include: attaching the front wheel, handlebars, pedals, and mirror-style accessories; filling the fuel tank with the correct 32:1 unleaded/oil mixture; and performing a pre-ride safety check. MotoTec's printed manual walks through each step.

Unleaded gasoline mixed with 2-stroke oil at a 32:1 ratio. Use standard pump gas (87 octane is fine) and high-quality 2-stroke oil from any auto-parts store. Never run straight gas — the engine will seize. The 1.6-liter tank gives 10+ miles per fill, which is a full afternoon of casual riding.

MotoTec covers the Thunder 50cc with a 30-day parts replacement warranty from delivery date — shorter than what you'll see on electric vehicles or power stations because of the higher wear rate on gas components. Swag House is an authorized MotoTec dealer — contact us first and we'll open the warranty claim with MotoTec's US service team on your behalf. For extended coverage, CPS Accidental Warranty plans are recommended — especially if you're shipping to Hawaii or Alaska where MotoTec does not provide after-sales services.

Yes. At $409, the Thunder works out to roughly $34/month over 12 months with Affirm's 0% APR option, if you qualify at checkout. Look for the Affirm monthly payment display under the price — it shows your approved rate before you commit.

The dirt bike (~85% pre-assembled), a basic tool kit for final assembly, the owner's manual with break-in and maintenance instructions, and your 30-day MotoTec parts warranty registration. Protective gear (helmet, gloves, goggles) is NOT included — required before first ride and sold separately.

US warehouse, freight carrier with standard ground delivery. Same-day processing on orders placed before 2pm CT. Transit typically 3–7 business days to the contiguous 48 states. Alaska and Hawaii require a freight quote and do not have MotoTec after-sales service — contact us first.