Trailmaster LK140 Pro Series Manual Dirt Bike | Electric Start

LK140 140cc Dirt Bike – More Power, Same Family-Friendly Ride

Step up your family's motocross experience with the LK140 140cc Dirt Bike—a full-featured trail machine that blends approachable handling with upgraded performance. Whether you're a beginner looking for a little more power or a family expanding your garage fleet, the LK140 offers a reliable, fun, and capable ride for teens and adults alike.

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Built for Progress. Engineered for Fun.

✅ More Power, Same Confidence  
Powered by a robust 140cc Yinxiang 4-stroke engine, the LK140 delivers 6.8 HP and 9.7 lb-ft of torque—perfect for riders who want more low-end pull and trail confidence without overwhelming control.

✅ Beginner-Friendly Manual Transmission  
Features a 4-speed non-circulating manual gearbox, giving new riders a proper foundation while letting more experienced riders enjoy full control of the bike.

✅ Electric + Kick Start for Convenience  
Whether you're starting cold in the morning or just finished a quick break on the trail, you'll appreciate both electric and kick start options—reliable every time.

✅ Built to Withstand the Ride  
A high-quality steel frame, inverted front forks, and alloy triple clamps ensure this bike is ready for the trail, the track, or your backyard loop.

✅ Great Fit for Teen & Adult Riders  
With a 32.89" seat height and 47.67" wheelbase, the LK140 provides comfortable, balanced ergonomics for a wide range of riders.

Key Specifications:

- **Engine:** Yinxiang 140cc, 4-Stroke, Air/Oil Cooled  
- **Max Power:** 6.8 HP @ 7500 RPM  
- **Max Torque:** 9.7 lb-ft @ 5500 RPM  
- **Transmission:** 4-Speed Manual, Non-Circulating  
- **Start Type:** Electric & Kick Start  
- **Ignition:** CDI  
- **Fuel Capacity:** 1.56 Gal  
- **Seat Height:** 32.89"  
- **Ground Clearance:** 13.26"  
- **Minimum Turning Radius:** 1900mm  
- **Tires:** YUANXING Knobby (F: 70/100-17, R: 90/100-14)  
- **Wheels:** Alloy 17” Front / 14” Rear  
- **Brakes:** Front & Rear Disc  
- **Frame:** High-Quality Steel  
- **Handlebar:** Foldable Alloy  
- **Net/Gross Weight:** 171.6 lbs / 226.6 lbs  
- **Overall Dimensions:** 69.42" x 28.86" x 42.9"

From Backyard Rides to Trailside Adventures

The LK140 is the perfect upgrade for families who’ve already caught the dirt bike bug—or the ideal first bike for those who want a little extra performance from day one. Reliable, rugged, and beginner-friendly, it's a bike that grows with you.

🏁 Ready to power up your next ride? The LK140 140cc Dirt Bike delivers fun, function, and freedom—all in one capable package.