A fair, spec-by-spec comparison of the three most-recommended 40cc kids dirt bikes.
Quick Answer
For most families, the FRP Moto FX40 Ogemaw is the most practical 40cc kids dirt bike of the three. It pairs full front and rear suspension and dual disc brakes with a beginner-friendly 20 mph top speed, an EPA-approved engine, an adjustable speed limiter, and a stocked OEM parts catalog that keeps the bike rideable in year two. The MotoTec Demon is a close match on suspension and brakes but typically costs more. The X-PRO Hawk offers a higher 165 lb weight limit but less documented suspension and parts support. All three are 40cc 4-stroke, automatic, pull-start bikes for kids and young teens on private property and off-road trails.
At a Glance
| Spec | FRP Moto FX40 | MotoTec Demon | X-PRO Hawk |
|---|---|---|---|
| Engine | 40cc 4-stroke | 40cc 4-stroke | 40cc 4-stroke |
| Top speed | 20 mph | ~22 mph | ~22 mph |
| Suspension | Full front & rear | Front 70mm + rear 60mm | Front; rear varies |
| Brakes | Dual disc (F&R) | Dual disc (F&R) | Dual disc (F&R) |
| Weight capacity | 132 lbs | Not published | 165 lbs |
| Transmission | Automatic, pull start | Automatic twist-go | Automatic, pull start |
| Speed limiter | Adjustable | Parental control | Varies |
| EPA approved | Yes | Confirm | Confirm |
| OEM parts stocked | Full catalog | Limited | Limited |
| Price | $279.99 | Typically higher | Varies |
Engine & Speed
All three run a 40cc 4-stroke engine with no oil mixing - just regular gas. The FRP Moto FX40 Ogemaw is geared to 20 mph; the MotoTec Demon and X-PRO Hawk top out around 22 mph. For a young beginner, the FX40’s slightly lower top speed plus its adjustable speed limiter let a parent cap the pace early and open it up as the rider improves. Control matters more than top speed for a first dirt bike.
Suspension & Brakes
Brakes are a wash - all three use front and rear disc brakes. Suspension is where the documented detail differs. The FRP Moto FX40 Ogemaw and the MotoTec Demon both have full front and rear suspension; MotoTec publishes 70mm front and 60mm rear travel. The X-PRO Hawk has front suspension, with the rear setup varying by listing, so confirm the current spec before buying.
Weight & Fit
The X-PRO Hawk has the highest published weight limit at 165 lbs, versus 132 lbs on the FRP Moto FX40 Ogemaw; MotoTec does not publish a figure. If your rider is on the heavier end for a 40cc bike, the X-PRO’s higher limit is worth weighing. For most kids and young teens, all three sit in the right range - match the seat height to the rider and confirm they can touch the ground.
Parts & Ownership
This is where the FRP Moto FX40 Ogemaw separates itself. FRP Moto stocks OEM replacement parts for the FX40 - powertrain, brake, drive, suspension, frame, plastics, and accessories - so a worn or crashed part gets replaced instead of turning the bike into scrap. Many generic-import 40cc dirt bikes have limited or no parts channel, which is exactly what bites owners in year two. If you plan to keep and ride the bike, parts support matters as much as the spec sheet.
Which 40cc dirt bike should you choose?
- Best all-round for families & beginners: the FRP Moto FX40 Ogemaw - 20 mph, full suspension, dual disc brakes, EPA approved, adjustable speed limiter, stocked OEM parts.
- If a higher weight limit matters most: the X-PRO Hawk (165 lbs).
- If you want twist-and-go styling and don’t mind paying more: the MotoTec Demon.
See the FRP Moto FX40 in Action
Watch the FRP Moto FX40 Ogemaw - its full suspension, dual disc brakes, and beginner-friendly handling on the trail.
Frequently Asked Questions
What is the best 40cc dirt bike for a kid?
For most families, the FRP Moto FX40 Ogemaw is the most practical 40cc kids dirt bike: full front and rear suspension, dual disc brakes, an EPA-approved engine, an adjustable speed limiter, and a stocked OEM parts catalog. The MotoTec Demon is a close match on suspension and brakes but typically costs more. The X-PRO Hawk has a higher 165 lb weight limit but less documented suspension and parts support.
How fast is a 40cc kids dirt bike?
All three top out in the low 20s: the FRP Moto FX40 Ogemaw is rated to 20 mph, while the MotoTec Demon and X-PRO Hawk are rated to about 22 mph. The FX40's slightly lower top speed plus its adjustable speed limiter make it easy for parents to keep a beginner at a controlled pace early on.
Do these 40cc dirt bikes have suspension and disc brakes?
Yes. All three are 40cc 4-stroke, automatic, pull-start bikes with front and rear disc brakes. The FRP Moto FX40 Ogemaw and the MotoTec Demon both have full front and rear suspension; MotoTec publishes 70mm front and 60mm rear travel. The X-PRO Hawk has front suspension, with rear setup varying by model.
Which 40cc dirt bike has the best parts support?
The FRP Moto FX40 Ogemaw. FRP Moto stocks OEM replacement parts for the FX40 - powertrain, brake, drive, suspension, frame, plastics, and accessories - so a worn or damaged part can be replaced instead of scrapping the bike. Generic-import 40cc bikes often have limited or no parts support, which matters in year two of ownership.
Are 40cc kids dirt bikes street legal?
No. The FRP Moto FX40 Ogemaw, MotoTec Demon, and X-PRO Hawk are all off-road models for private property and designated off-road trails, not public roads. The FX40 is EPA approved; always confirm certification and your local rules before riding.
Which 40cc dirt bike should I buy?
Choose the FRP Moto FX40 Ogemaw if you want a beginner-friendly 20 mph top speed, full suspension, dual disc brakes, EPA approval, and dependable OEM parts support. Consider the X-PRO Hawk if a higher 165 lb weight limit is the priority, or the MotoTec Demon if you prefer twist-and-go styling and don't mind a higher price.
