TrailMaster MK125ES Pro Series Dirt Bike, BOSCH EFI, 4-Speed, Electric Start, Dual Disc Brakes, (14/12) Wheels

    The TrailMaster MK125E Pro Series is a modern mid-size dirt bike built for riders who want clean fuel-injected performance, easy starting, and strong all-around trail capability. Powered by a reliable 125cc Zongshen 4-stroke engine with Bosch EFI, it delivers smooth throttle response, consistent power, and improved cold-start reliability compared to carbureted models.

     This model features a 4-speed manual transmission with a hand-operated clutch, giving riders full control over gear selection and a more authentic dirt bike riding experience. With electric start plus kick-start backup, inverted front suspension, nitrogen rear shock, hydraulic disc brakes, and a 14-inch front / 12-inch rear wheel setup, the MK125E Pro Series is built for stability, comfort, and off-road confidence. Ideal for riders ages 12 and up.

Performance Specs:

Engine

• 125cc Single-Cylinder, 4-Stroke, Air-Cooled Zongshen engine
• Bosch Electronic Fuel Injection (EFI)
• 123.67cc displacement
• 4-Speed Manual Transmission (1-N-2-3-4)
• Manual Clutch System
• Electric Start with Kick Start Backup
• CDI / EFI ignition system
• Chain drive system
• Max power: 6.3 HP @ 7500 RPM
• Max torque: 8.8 N·m @ 5500 RPM
• Compression ratio: 9.0:1
• Fuel consumption: ≤367 g/kW·h

Fuel System

• Bosch EFI (Electronic Fuel Injection)
• Fuel capacity: 0.92 gallons (3.5L)
• Improved cold starts and throttle response
• No carburetor tuning required

Suspension

• Front: Inverted hydraulic forks (43/45mm)
• Rear: Nitrogen gas mono shock with aluminum linkage
• Pro-series suspension setup for improved stability and impact absorption

Braking System

• Front hydraulic disc brake
• Rear hydraulic disc brake
• Dual disc braking system for strong stopping power

Wheels & Tires

• Front tire: 60/100-14 knobby off-road tire
• Rear tire: 80/100-12 knobby off-road tire
• Alloy wheels with hubs
• Off-road tread for traction and control

Dimensions

• Overall length: 63.8 in
• Overall width: 27.6 in
• Overall height: 42.9 in
• Wheelbase: 45.3 in
• Seat height: 29.5 in
• Ground clearance: 10.2 in

Frame & Construction

• Reinforced steel frame
• Aluminum linkage components
• Foldable alloy levers
• Stainless steel performance muffler
• Waterproof wiring harness
• Lightweight Pro-Series chassis design

Weight

• Net weight: 149lbs
• Gross weight: 213lbs

Additional Features

• Bosch EFI fuel injection system
• Electric start + kick start backup
• 4-speed manual clutch transmission
• Inverted front forks for improved handling
• Nitrogen rear shock for smoother ride quality
• Lightweight mid-size frame for agility
• Built for trail riding, off-road use, and recreation
• Recommended rider age: 12+
• Available in Red, Blue, Green

What's Included

✔ TrailMaster MK125E Pro Series Dirt Bike
✔ Electric start battery
✔ Kick start system
✔ Tool kit
✔ Owner’s manual
✔ Assembly hardware & instructions