How Much Is a Dirt Bike for a 10, 12, or 14 Year Old?
- on August 25, 2026
- Categories: Articles
A kids’ dirt bike costs $349 to $999 for most riders aged 7 to 12, and $999 to $1,829 for teens on a 125cc to 150cc bike. At Motobuys the entry point is $349 for a 58cc and $659 for a 110cc automatic with electric start. Price tracks engine size and seat height far more than it tracks your child’s age.
Every week someone calls our Garland warehouse and opens with “my son is ten, what does he need?” It’s the right question asked the wrong way. Age tells us almost nothing useful. A tall ten-year-old and a small thirteen-year-old often end up on the exact same bike. What actually decides it is whether the kid can plant both feet on the ground at a stop.
So here’s what these bikes really cost, and how to pick the size without guessing.
Dirt bike prices by engine size
Live prices as of August 25, 2026, across the 96 dirt bikes and pit bikes currently listed. Prices move with the vendor, so treat this as a snapshot rather than a permanent price list.
| Engine | Models | In stock | Price range | Typical | Usually fits |
|---|---|---|---|---|---|
| 50–70cc | 4 | 3 | $349 – $599 | $599 | Ages 4–7, first bike |
| 90–110cc | 13 | 9 | $599 – $999 | $699 | Ages 7–11 |
| 125cc | 14 | 8 | $699 – $1,764 | $899 | Ages 10–14 |
| 140–150cc | 9 | 5 | $999 – $1,829 | $1,199 | Ages 12+ and small adults |
| 160–250cc | 14 | 12 | $899 – $1,999 | $1,769 | Teens and adults |
| 300cc+ | 8 | 7 | $1,799 – $3,899 | $3,349 | Adults only |
The “usually fits” column is the industry convention, not a rule. Use it to narrow the list, then check the seat height.
Why seat height beats age every time
A new rider needs to touch the ground. Not tiptoe — plant the balls of both feet flat while sitting normally. A kid who can do that will pick up clutch control and cornering in an afternoon. A kid who can’t will drop the bike at the first stop, get scared, and lose interest by the third ride. We have watched that happen enough times to be blunt about it.
Measure your child’s inseam in the boots they’ll actually ride in. That number should be close to the seat height, and it’s fine for the seat to sit an inch or two above it once they have some experience. The seat height is printed in the title of every bike we list, so you can filter without emailing anyone.
- •25 inches — a 110cc automatic. Suits most 7 to 10 year olds.
- •29 inches — a 125cc semi-automatic. Suits most 11 to 13 year olds.
- •33 inches — a 140cc. Suits taller teens and adults.
Automatic, semi-automatic, or manual?
This matters more for a first bike than the engine does.
- •Fully automatic — twist and go, no clutch, no shifting. For a first-time rider under about eleven this is almost always the right call. One less thing to think about while they’re learning where the brakes are.
- •Semi-automatic — gears but no clutch lever. You shift with your foot and the bike handles engagement. The natural second step, and where a lot of eleven to fourteen year olds land.
- •Manual — a real clutch lever. Where a kid moves once they’re riding regularly and want to race or ride trails properly. Don’t start here unless they’ve already ridden something.
One practical note that costs people money: a speed governor is worth more than horsepower on a first bike. It’s an adjustable screw that caps top speed, and it lets you open the bike up as your kid earns it rather than handing them everything on day one. Several of our sub-$700 bikes have one.
What the price actually includes
Budget beyond the sticker. Helmet, goggles, gloves and boots run $150 to $300 for a kid, and none of it is optional. Bikes in this class arrive partially assembled — usually the front wheel, handlebars and mirrors need fitting, plus fluids and a battery charge. If you’d rather not do that yourself, we offer an assembly service; the fee is listed on the product page when it applies.
Financing is available if you’d rather spread it out. And if you get stuck during setup, call 877-667-6289 — the phone goes to people who work in the same building as the bikes.
Three bikes that cover most of the range
A shortlist instead of 96 options. All three are in stock today.
Trailmaster TM11 Dirt Bike 110cc Automatic Great Kids Bike
25″ seat · 110cc automatic · electric start
$659$829
View bike
TrailMaster TM23 Dirt Bike 125cc Semi Automatic
29.3″ seat · 125cc semi-automatic · electric start
$939$1,149
View bike
TrailMaster LK140 140cc Dirt Bike for Youth/Adults
32.89″ seat · 140cc · inverted shocks
$1,199$1,499
View bikeFrequently asked questions
How much is a dirt bike for a 12 year old?
Most twelve-year-olds fit a 110cc to 125cc bike, which runs $659 to $999 at current prices. A 125cc with a 29-inch seat is the common pick. If your child is tall for their age, a 140cc at around $1,199 will last them longer.
How much is a dirt bike for a 10 year old?
Plan on $599 to $759. That buys a 107cc to 110cc automatic or semi-automatic with electric start and a seat height around 24 to 25 inches, which is the right size for most ten-year-olds.
What size dirt bike does a 10 year old need?
Usually a 110cc with roughly a 25-inch seat height. Measure their inseam in riding boots first. If it comes out under 24 inches, size down to a 70cc rather than buying something they'll grow into.
Are cheap dirt bikes for kids any good?
Under about $350 you're looking at electric toys rather than gas dirt bikes. From $349 up you get a real four-stroke engine, disc or drum brakes and a steel frame. The meaningful jump in build quality lands around the $650 to $900 mark, where you start getting electric start, better suspension and twin-spar frames.
Do you need a license for a kids' dirt bike?
Not for riding on private property in most states. Riding on public land or designated OHV areas usually requires the machine to be registered, and rules differ by state. Check your state's OHV agency before you ride anywhere public.
Browse the full range of dirt bikes and pit bikes, or go straight to kids’ and teens’ vehicles. Every listing shows the seat height, engine size and current price, so you can do the fitting math before you pick up the phone.
