Trailmaster SX125 Dirt Bike, 124cc, Max Speed 50 mph, Ages 16+, 4-Speed Manual, Air-Cooled Engine, Electric & Kick Start, 19/16 Tires, 32.7" Seat Height (Blue)

★★★★★ 4.7 44 reviews

$1,717.80
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Management number 230385336 Release Date 2026/06/18 List Price $687.12 Model Number 230385336
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The Trailmaster SX125 Dirt Bike is built for riders seeking a dependable and affordable off-road machine. Powered by a 124cc, 4-stroke, air-cooled Zongshen engine, this bike delivers reliable performance for trail and recreational use. It features a 4-speed manual transmission with chain drive, giving riders smooth gear transitions and control on various terrains. Designed with both youth riders stepping up in size and adults looking for a compact dirt bike, the SX125 reaches a maximum speed of up to 50 mph and is recommended for riders ages 16 and older. Built with a high-quality steel frame and lightweight alloy components, the SX125 is durable yet easy to handle. A 32.7-inch seat height and 13.4 inches of ground clearance provide stability and rider comfort, while the inverted front fork suspension and rear shock with alloy connectors help absorb impacts during off-road riding. For stopping power, the bike comes equipped with front and rear hydraulic disc brakes. Additional features include a stainless steel exhaust, waterproof wiring harness, and alloy wheels fitted with a 19-inch front tire and 16-inch rear tire. The 1.56-gallon fuel tank provides ample riding time before refueling. The Trailmaster SX125 is a well-balanced dirt bike that combines strength, comfort, and off-road capability, making it an excellent choice for trail enthusiasts. ⚠️ Note for California Residents: This model is not CARB approved and can only be used on private land in California.

  • ‌Powerful Engine: Equipped with a 124cc, 4-stroke, air-cooled Zongshen engine, delivering smooth and reliable power for trail riding and off-road adventures.
  • Manual Transmission: 4-speed manual transmission with chain drive provides full control, making it a great option for riders who want a true dirt bike experience.
  • Top Speed Performance: Reaches a maximum speed of up to 50 mph, depending on rider weight and terrain conditions.
  • Recommended Age Range: Designed for riders 16 years and older, making it a suitable starter dirt bike for teens or smaller adults.
  • Comfortable Riding Position: 32.7-inch seat height offers a secure fit for riders while the 13.4-inch ground clearance ensures better handling on rough terrain.
  • Fuel Capacity: Large 1.56-gallon fuel tank allows for longer ride times before refueling.
  • Safety & Control: Front and rear hydraulic disc brakes provide strong and reliable stopping power even at higher speeds.
  • Durable Suspension System: Features inverted front forks and a rear mono shock with alloy connectors to absorb bumps and improve ride comfort.
  • Off-Road Ready Tires: Alloy wheels with 19-inch front tire and 16-inch rear tire deliver excellent grip and traction for dirt trails and rough surfaces.
  • Performance Exhaust: Stainless steel muffler enhances performance, reduces noise, and ensures long-lasting durability.
  • Built for Durability: High-strength steel frame combined with lightweight alloy components ensures a strong yet manageable bike for riders.
  • Reliable Electronics: Waterproof wiring harness protects against dust and moisture, keeping the electrical system secure.
  • Easy Start Options: Comes with electric start for convenience and a kick-start backup for reliability in any situation.
  • Stable Weight: Net weight of 189 lbs provides balance and stability without being too heavy for smaller riders.
  • California Use Notice: ⚠️ This unit is not CARB approved for on-road use in California; it is intended for off-road or private property use only.
Brand Trailmaster Suspension
Vehicle model TM-SX125-Blue
Engine displacement 125 cc
Color Blue
Maximum speed 50 mph
Seat height 32.7 in
Fuel type Gasoline
Transmission type Manual
Vehicle make Trailmaster
Ground clearance 13.39 in
Max load 220 lb
Torque 17.8 Nm
Engine starter Electric/Kick
Rec. use Outdoor
Front brakes Disc
Rear brakes Disc
Front suspension Inverted Fork
Rear suspension Single Alloy Shock (non-adjustable)
Number of engine cycles 4 Cycle
Fuel system Carburetor
Seating capacity 1
Average fuel consumption 85 mpg
Vehicle type Dirt Bike
Age group Teen, Adult
Clutch type Manual (4-Speed Manual Transmission)
Automotive brake type Disc Brakes
Fuel capacity 1.56 gal
Dry weight 199 lb
Curb weight 189 lb
Wheelbase 49.25 in
Ignition type CDI
Accessories included Owner’s Manual, Tool Kit
Front tires 70/100-19
Rear tires 90/100-16
Model TM-SX125-Blue
Number of cylinders 1
Engine cylinder head type Single Overhead Cam (SOHC)
Valvetrain SOHC
Finish Gloss
Bore x stroke 54 mm × 54 mm
Dimensions 71.31 x 29.16 x 43.34 in
Cooling system Air Cooled
Compression ratio 9.0:1
Assembled product weight 199 lb
Induction system Naturally Aspirated

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4.7 out of 5
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44 ratings | 18 reviews
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