TrailMaster LK140 Dirt Bike | 140cc Electric Start

Product Description

Experience the perfect balance of power and control with the TrailMaster LK140 Pro-Series Dirt Bike. Featuring a high-performance 140cc Yinxiang 4-stroke engine delivering 6.8hp, this mid-size dirt bike is engineered for riders who demand serious performance without the premium price tag.

Key Features & Premium Components:

• Powerful 140cc Yinxiang Engine: 6.8hp @ 7500 RPM with 9.7 Nm torque for exceptional trail performance
• Dual Start System: Electric start convenience with kick start backup for ultimate reliability
• Pro-Series Suspension: Inverted front shock absorber with nitrogen air gas rear shock and aluminum linkage
• Premium Wheel Setup: 17" front alloy rim with 14" rear for optimal handling and durability
• Superior Braking: Front and rear disc brakes for confident stopping power
• Quality Components: Stainless steel muffler, alloy rims and hubs, foldable handle levers
• Perfect Size: 32" seat height ideal for teens and adults
• Lightweight Design: Only 172 lbs for easy handling and maneuverability

Complete Technical Specifications:
Engine & Performance:

• Engine Type: Yinxiang 140cc, Single cylinder, 4-stroke, air/oil-cooling
• Displacement: 140cc
• Maximum Power: 6.8hp @ 7500 RPM
• Maximum Torque: 9.7 Nm @ 5500 RPM
• Compression Ratio: 8.8:1
• Start Type: Electric and Kick Start
• Ignition: CDI
• Fuel Consumption: ≤ 367g/kw.h
• Lubricant Type: SF15W/40

Transmission & Drive:

• Transmission: 4-speed manual, non-circulate
• Drive Type: Chain Drive
• Minimum Turning Radius: 1900 mm

Dimensions & Weight:

• Overall Dimensions: 69.42" x 28.86" x 42.9"
• Wheelbase: 47.67"
• Seat Height: 32.89"
• Ground Clearance: 13.26"
• Net Weight: 171.6 lbs
• Gross Weight: 226.6 lbs
• Fuel Tank Capacity: 1.56 gallons

Suspension & Handling:

• Front Suspension: Inverted shock absorber, non-adjustable
• Rear Suspension: Alloy U&D connector, non-adjustable with nitrogen air gas
• Frame: High quality steel frame
• Triple Clamps: Alloy construction
• Handle Levers: Alloy and foldable design

Wheels & Brakes:

• Front Wheel: 17" alloy rim and hub
• Rear Wheel: 14" alloy rim and hub
• Front Tire: YUANXING 70/100-17
• Rear Tire: YUANXING 90/100-14
• Front Brake: Disc brake system
• Rear Brake: Disc brake system
• Exhaust: Stainless steel construction

Why Choose the TrailMaster LK140 Dirt Bike?
The LK140 Pro-Series delivers premium components typically found on bikes costing twice as much. From the inverted front shock absorber to the nitrogen gas rear suspension with aluminum linkage, every component is engineered for performance and durability.

Ideal for These Riders:

• Intermediate to advanced young riders
• Adults seeking a nimble, lightweight dirt bike
• Trail riding and off-road adventures
• Riders transitioning from smaller bikes
• Weekend warriors and recreational riders

Pro-Series Premium Features Included:
As part of TrailMaster's Pro-Series lineup, the LK140 includes premium features as standard equipment:

• Inverted front shock absorber (usually a $500+ upgrade)
• Nitrogen air gas rear shock with aluminum linkage
• Performance stainless steel muffler
• Alloy foldable handle levers (unbreakable design)
• Quality alloy rims and hubs
• Professional-grade disc brakes front and rear
• High-quality steel frame construction
• CDI ignition system for reliable starting

Available Color Options:
Choose from Red, Blue, Green, or Orange to match your style and personality.

Built for Trail Performance:
The LK140's full motocross ergonomics and race suspension system make handling feel natural and unforced, helping you navigate any terrain with confidence. The electronic CDI ignition ensures effortless starting and smooth operation across all gears, delivering a broad, even power band perfect for trail riding.

The 32.89-inch seat height makes this dirt bike accessible for most teens and adults, while the 172-pound weight ensures easy handling and maneuverability on challenging terrain.

Value Proposition:
Ready to experience the TrailMaster difference? The LK140 Pro-Series combines premium components, proven reliability, and unmatched value in the 140cc dirt bike category. With features typically found on bikes costing significantly more, the LK140 delivers professional-grade performance at an affordable price.

Perfect for riders who want:

• Reliable electric start with kick start backup
• Premium suspension components
• Lightweight yet durable construction
• Trail-ready performance
• Exceptional value for money

Things To Know:

• Thank you for considering GoPowerSports as your source for quality outdoor power sports needs. We take pride in our commitment to providing excellent customer service and support. We aim to ensure complete satisfaction with your purchase and encourage you to review our warranty policies carefully. If you have any questions, please feel free to contact us via email at sales@gopowersports.com or by calling 1-866-846-5278.
• We highly recommend that you have a professional mechanic or an authorized dealer of the manufacturer perform the initial assembly and preparation of the vehicle.
• We want you to know that basic repair and setup skills are necessary for buyers, such as using tools, replacing nuts and bolts, filters, light bulbs, fluids, and making adjustments. If you lack these skills, we suggest seeking the assistance of a mechanic. Our tech support hotline is always available to help you.
• These vehicles ship with break-in oil.  Must check oil levels before initial start up and fill with quality oil if low.
• Check over all Nuts and Bolts to ensure they are fastened before and after initial ride.
• This vehicle is meant for recreational use only.

Warranty:

• The limited warranty covers specific parts only, including the engine, engine case, drive system, fuel system, electrical system, cooling system, brakes, chassis, and transmission. Please note that the warranty does not cover any damage caused by improper use, such as jumping, stunt riding, modification, racing, or riding at constant wide-open throttle.
• Please be aware that the following parts are NOT covered by the warranty: tires, rims, body panels, forks, shocks, gaskets, light bulbs, seats, CV boots, oil filters, air filters, fuel filters, clutch wear parts, cables, drive belts, chains, spark plugs, rubber parts, belts, brake linings and/or pads, batteries, sprockets, external springs, clips, nuts, bolts, and fasteners.
• Our warranty does not cover damages caused by improper assembly, maintenance, or usage that falls outside of the manufacturer's specifications.
• Also, please note that no returns are accepted on this unit.

Shipping:

• If you purchase a TrailMaster Unit, please know that it only ships to the lower 48 states.  Contact us if you would like a quote for shipping to Hawaii or Alaska.
• If unit is shipped to California, then it can only be used on Private Land if the engine is not EPA or CARB compliant.
• Please allow 3-5 business days for your unit to ship. Once shipped, a tracking number will be emailed to you. The shipping company will contact you to confirm delivery.
• Your order will ship in a crate and you will be responsible for handling the crate whether it is delivered residential, local Carrier Terminal, or business dock.  This may require a forklift.

Assembly:

• You will choose to receive this unit partially assembled in crate.  You will need to attach the front tire, handlebars, rear shocks, and few other adjustments.