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TrailMaster TM21-125 Dirt Bike: 14/12-Inch Wheels, Semi-Automatic



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TrailMaster TM21-125: Unleashing Off-Road Excitement

Embark on thrilling off-road adventures with the all-new TM21, the latest creation from Trailmaster, a trailblazer in the industry. This dirt bike showcases an unparalleled frame design, improved suspension, and an industry-leading 6 months/6,000 miles warranty for the engine and transmission. Trailmaster's dedication to excellence is evident in the outstanding TM line of dirt bikes, offering superior components, advanced design, and ease of maintenance, making it the preferred choice of Power Sports Professionals.

Combining design elements found in bikes costing five times as much, this groundbreaking dirt/pit bike features a Twin Spar Frame, oversized vented front and rear disk brakes, coil-over rear shocks, and lightweight frame components. Designed for the young rider, it packs plenty of power and is geared to provide a solid foundation with a semi-automatic transmission.

Key Specifications:

  • Powerful 125cc engine
  • Kick start with automatic clutch, semi-automatic transmission
  • 41.54" wheelbase and 29.13" seat height
  • Front tire size of 14" and Rear Tire size of 12"
  • Hydraulic front and rear disc brakes
  • Aluminum handlebar

Attention California customers: This item is NOT CARB approved. However, it is suitable for use on private land. Trailmaster's commitment to innovation and quality shines through in the TM21, offering an unparalleled off-road experience for riders of all levels.


Engine System
 Engine Type ZM125cc, Single Cylinder, 4-Stroke, Air Cooled
Displacement 124 ml
Max Power 6.2(1±10%)/7000(1±5%) kw/r/min
Max Torque 9.0(1±10%)/5000(1±5%) N.m/r/min
Compression Ratio 9.6:1
Shift Type N-1-2-3-4, Four-Gears, Automatic Clutch
Start Type Kick Start
Ignition CDI
Min. Fuel Consumpetion: ≤367g/kw.h
Max Range: ≤10.5mile
Engine Oil #: SJ5W一30
Transmission: Chain Drive; #428,14/41T
Size Data
Overall Size (L x W x H) 1530*730*1010MM /60.24"X28.74"X39.76"
Wheel Base 41.54"
Seat Height 29.13"
Ground Clearance 10.63"
Fuel Capacity 3.5 L/0.92 Gal.
Wheels Steel 1.6 x 14" / 1.85 x 12" Rims, Cast Hubs
Tires FT: 60/100-14 - RR: 80/100-12
Frame/Suspension/Brake system
Frame Cradle Type Steel Tube Frame
Front Fork Telescopic ¢33*650mm Forks, Non-Adjustable
Rear Shock ¢10*270mm , Non-Adjustable
Swing-Arm Steel Tube 12 inch
Handle Bar Aluminium Crossbar ,L=28.35"; Dia=0.87"
Front Brake Hydraulic Single Piston Caliper, 220mm Disc
Rear Brake Hydraulic Single Piston Caliper, 190mm Disc
Exhaust Steel Pipe with catalyst converter(EPA Standard)
TrailMaster TM21-125 Dirt Bike: 14/12-Inch Wheels, Semi-Automatic

TrailMaster TM21-125 Dirt Bike: 14/12-Inch Wheels, Semi-Automatic