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return to shopFit matters more than age. A rider should reach the ground with the balls of both feet and stay under the bike's weight limit. Start with the table, then open the guide that matches your rider.
Which FRP dirt bike fits your rider?
| Model | Rider | Seat / size | Top speed | Max rider | |
|---|---|---|---|---|---|
 |
FX40 Ogemaw (40cc) | Kids 8+, supervised, no clutch | Low seat, full suspension | ~20 mph | 132 lb |
 |
FX125 14"/12" | Teens ~12–16 learning to shift | 28.1" seat | ~56 mph | 265 lb |
|
FX125 17"/14" | Taller teens and adults (~5'5" and up) | 33.9" seat | ~56 mph | 265 lb |
 |
FX140 (140cc) | Experienced teens and adults | 33.9" seat, oil-cooled | 65 mph | 265 lb |
Guides by age
Age is a rough guide; height, inseam and experience decide the final pick.
- Is a 50cc Dirt Bike Right for Your Child? What Parents Need to Know in 2026: whether a 50cc is the right first engine for younger kids
- What Age is Right for a Kids Dirt Bike?: when kids are ready to start riding
- Gas Dirt Bikes for Kids by Age: 7, 8, 9 & 10 Year Olds: engine size and bike picks for ages 7 to 10
- What Size Dirt Bike for 8 Year Old? Complete Guide: sizing and engine choice for an 8-year-old
- Dirt Bikes for 12-Year-Olds: Engine Size, Speed, and Safety Guide 2026: engine size, speed and safety at 12
- What CC dirt bike for a 13 year old: which displacement makes sense at 13
- What Size Dirt Bike for a Teenager? How to Pick the Right Fit by Age and Height: picking by age and height for teens
Size charts and fit
How to match seat height, wheel size and weight limit to your rider.
- Dirt Bike Size Chart by Age: Finding the Perfect Fit: size chart by age, height and seat height
- What Is the Best Dirt Bike for Kids? Complete Age and Size Guide 2026: the full age and size buying guide
- Kids Dirt Bike Ultimate Guide: Choosing The Right Dirt Bike Size For Your Kids: a step-by-step fit check
Speed, engine size and when to size up
What each engine size really does, and the signs your kid has outgrown their bike.
- How fast is a 40cc kids dirt bike?: real-world speed of a 40cc kids bike
- How Fast Is a 140cc Dirt Bike? (FX140 Top Speed): 140cc top speed and who it is for
- When to Upgrade Your Kid from a 40cc to a 125cc Dirt Bike (FX40 to FX125): moving from FX40 to FX125
Safety, gear and first rides
Gear checklists and how to make the first rides safe.
- Essential Safety Gear for Kids Riding Dirt Bikes: The Complete Checklist: helmet, boots, gloves and body armor
- What is the Safest Dirt Bike for My Kid? Entry-Level Options Compared: entry-level options compared on safety
- Beginner's Guide to Safe and Easy Kid’s Dirt Bike Riding: teaching a beginner step by step
- Kids Dirt Bike With Training Wheels: Is a 40cc or 50cc Better?: training wheels on a 40cc or 50cc
What a kids dirt bike costs
Price ranges by engine size and what the extra money buys.
- How Much Does a Kids Dirt Bike Cost? What the Price Actually Buys (2026): the 2026 price guide
The FRP dirt bike lineup
Kids · ages 8–12
FX40 Ogemaw
The first dirt bike. 40cc 4-stroke, full suspension, dual disc brakes, about 20 mph, 132 lb max.
from $279.99 · See colors, packages and current price →Teens & adults · manual clutch
FX125
125cc, real 4-speed manual, two wheel sizes, 265 lb capacity. Freight delivery.
from $799.99 · See colors, packages and current price →Experienced riders · top of the range
FX140
140cc oil-cooled, 4-speed manual, 65 mph, 33.9" seat. Freight delivery.
$1,449.99 · See colors, packages and current price →
Before the first ride: every FRP dirt bike is a 4-stroke, EPA-certified off-road vehicle for private property or designated riding areas. They are not street legal, and FX125 and FX140 do not ship to California. A fitted helmet, eye protection, gloves, long sleeves, long pants and over-the-ankle boots are required, and young riders need adult supervision.
