Trailmaster JHL MK125 Dirt Bike, 123.6cc, 4 speed manual trans, Air Cooled, Electric Start, Dual Disk Brakes,29.5 inch seat, 14 inch front tire, Inverted Front Forks, Rear Nitrogen Mono Shock.

Trailmaster is pleased to introduce its newest line of dirt bikes in partnership with JHL. With a focus on detail and quality components, this new line takes the jump from cruising on a pit bike to a true dirt bike.  

The youth size MK 125 features a 4 stoke 123.3cc air-cooled engine, four-speed manual transmission, and upgraded components throughout the frame and suspension.  With a focus on keeping the bike lightweight, the power-to-weight ratio is the best in this class. The extended trailing arm, compared to pit bikes, and the inverted front forks give this true dirt bike plenty of suspension for trail riding or a turn around the track. 

Alloy components are used wherever possible to keep the bike light. Alloy folding levers, stainless muffler, waterproof wire harnesses, and nitrogen-filled shocks make this a bike that can be compared to the Japanese or European bikes and truly be a competitor. 

Oversized vented brake calipers and aluminum triple tree components are just a couple of the newest upgrades to the Trailmaster lineup. 

The pictures do not do not tell the whole story.  The quality of the Zongshen engine and the Japanese-style carburetor give these bikes performance and after-sale support second to none. 

This unit can come assembled by the distributor for an additional fee. The engine burns premium fuel for maximum performance.

revised 09/23/2024

1. Electric and Kick Start

   • Versatility: Offers the convenience of an electric start along with the reliability of a kick start. This dual-start system ensures that you can start the bike easily under various conditions.

2. Famous Brand Name RS

   • Reliability: Powered by a Zongshen engine, known for its durability and performance. This brand is well-regarded in the industry for producing reliable and efficient engines.

3. Newly Designed Frame

   • Durability: Features a robust frame designed to withstand tough riding conditions. The new design enhances the bike's structural integrity, ensuring a longer lifespan.

4. Inverted Front Shock Absorber

   • Improved Handling: The inverted front shock absorber offers superior handling and stability, especially on rough terrains. It provides better compression and rebound damping for a smoother ride.

5. Nitrogen Air Gas Rear Shock Absorber with Aluminum Linkage

   • Advanced Suspension: Equipped with a nitrogen air gas rear shock absorber and aluminum linkage, this setup provides excellent rear suspension performance, improving comfort and control.

6. Performance Stainless Steel Muffler

   • Enhanced Performance: The stainless steel muffler not only looks great but also improves exhaust flow, enhancing the bike’s overall performance and sound quality.

7. Waterproof Wire Harness

   • Reliability: A waterproof wire harness ensures that the electrical components are protected from water and dust, reducing the risk of electrical failures.

8. Alloy Foldable Handle Levers

   • Convenience and Safety: High-quality alloy foldable handle levers are designed to reduce damage in case of a fall, adding an extra layer of safety and convenience.

9. High Quality Alloy Rims and Hubs

   • Durability and Performance: The use of high-quality alloy rims and hubs enhances the bike’s durability and performance, ensuring a stable and reliable ride.

10. Quality Front and Rear Disc Brakes

    • Safety: Equipped with high-quality front and rear disc brakes, the TM MK125 offers excellent stopping power, ensuring rider safety in various riding conditions.

Specifications

Our Company Warranty Policies
Your satisfaction is our #1 goal. We strive to provide our customers with the highest level of customer service and support we can. We strongly suggest our customers read the following information thoroughly. If you have any questions about any of our or the manufacturers policies, please feel free to email us or call 1-877-667-6289.
If you need parts at the bottom of our home page you will find “Parts Request or https://motobuys.com/pages/part-request = simply fill out the form and click submit.
For Tech Support: https://motobuys.com/pages/technical-supports simply fill out the form and click submit
THE MANUFACTURERS WARRANTY COVERS PARTS, ENGINE ONLY FOR ALL PRODUCTS AS FOLLOWS:
OFF ROAD: ATV'S, UTV'S, BUGGIES, GO CARTS AND DIRT BIKES offer 3 MONTHS PARTS, 6 MONTHS ENGINE WARRANTY, MOTOBUYS.com will supply new or rebuilt replacement parts in exchange for defective parts for a period of 3(three) months, as well defective engines for a period of 6(six) months from the date of purchase at no charge.
Buyers will need basic repair & basic setup skills such as using tools; replacing nuts & bolts, filters, light bulbs, fluids, adjustments, etc. If you don’t have this ability we suggest using a mechanic to assist you with your needs. Our tech support Hotline is available to assist you.
THIS LIMITED WARRANTY COVERS THE FOLLOWING PARTS ONLY:
ENGINE: All internal lubricated parts, i.e. Pistons, piston rings, piston pins, connecting rods, rod bearings, camshaft, camshaft bearings, timing chain, crankshaft, crankshaft main bearings, oil pump, water pump, valves, valve springs, valve guides, valve seats, valve lifters and valve push rods. Additionally, the engine head and cylinder will only be covered if damage is caused solely as a result of the mechanical failure of one or more internal lubricated components listed above. (Broken gears any damage from outside impacted is not covered warranty)
ENGINE CASE: The Engine case itself will only be covered if the damage caused was solely as a result of the mechanical failure of one or more of the internal lubricated components listed above. (Broken gears any damage from outside impact is not covered warranty)
DRIVE SYSTEM: All internal lubricated parts contained within the drive axle housing case, i.e. differential, differential gears, drive shaft, drive axles, CV joints, axle bearings, reverse gears and output shafts. The drive axle housing as well as the reverse gearbox housing, if damaged solely as a result of the mechanical failure of one or more or the internal lubricated components contained the drive axle housing will be covered. (Any bent, broken, or damage by outside impact is not covered warranty)
FUEL SYSTEM: For carburated vehicles; Carburetor, vacuum fuel pump, intake manifold, fuel tank and fuel petcock. For fuel injected vehicles; Fuel injectors, fuel pump, fuel rail and fuel pressure regulator.
ELECTRICAL: Stator, stator pickup, magneto, voltage regulator\ rectifier, CDI, starter relay\ starter solenoid, starter motor, coil, distributor assembly and injector relay.
COOLING SYSTEM: Radiator, radiator cap, thermostat, thermostat housing, temperature indicator switch, cooling fan motors; water pump and water pump housing.
BRAKES: Calipers, drum housings, drum brake linkage, reservoirs, rotors, and lines.
CHASSIS: Frame, swing arms, A-arms, steering controls, (if not caused by jumping or impact.)
TRANSMISSION (Automatic or Standard): All internal lubricated parts contained within the transmission case, i.e. flywheel, hydraulic shift linkage, kick start spindle, kick start secondary gear and transmission gears. The transmission case itself will be covered if the damage was solely as a result of mechanical failure of one or more of the internal lubricated components contained within the transmission case. (Improper shifting of gears by not coming to stop complete can cause damage to internal gears. (""This cause is not covered warranty"")


WHAT IS NOT COVERED: The following is a list of items not covered by the warranty policy. This list is not all inclusive and may be modified at any time. Batteries, Belts, Brakes and Brake Pads, Chains, Clutch, Foot peg mount, Hand Levers, Hoses, Lights, Mirrors, Plastic Body, Seats, Shocks, Spark Plugs, Tires, Transmission.
COVERAGE AND LIMITATIONS: Initial assembly and preparation must be preformed in accordance with the Consumer Motor Vehicle Delivery Preparation and Inspection Form that is provided by the manufacturer. Additionally, all work must be performed by a professional mechanic (i.e. engine repair shop, motorcycle shop, or local auto repair shop) or an authorized Dealer of the manufacturer to assure your vehicle is in good working condition. Upon completion, you must mail in the Consumer Motor Vehicle Delivery Preparation and Inspection Form signed by the technician that performed the service. You will need to provide proof of this service when filing a warranty claim, so (end user) must keep your receipts. Subject to the limitations stated in this agreement,
MOTOBUYS.com agrees (at its sole discretion) to replace a covered component if the covered component fails as a result of one or more of the internal lubricated parts within the component stated warranty period from the date of purchase, while the component has been used under the conditions and in the manner specified by its original manufacturer. Keep in mind these off-road units are built for recreational use only. Your claim may be denied under the following circumstances:
Misuse or abuse of the vehicle, i.e.
Jumping
Stunt riding
Modification of any kind
Racing
Riding at constant wide open throttle (over revving the engine)
Unit is used as a rental
Damage is caused by an accident
Product is used in a manner that it is not designed for
Rider abuse
Improper adjustment\operation of the clutch, i.e. dragging, causing premature burning of the
friction plates
Improper adjustment\operation of brakes. Driving with parking brake on.
Improper gear engagement, i.e. engaging reverse will moving forward
Improper maintainance, i.e.
Lack of routine maintenance
Repairs performed improperly,
Use of incorrect lubricants
Improper initial set up
Use of aftermarket parts for repair
The following items are not covered: Tires, rims, body panels, fuses, forks, shocks, gaskets, light bulbs, seats, CV Boots, oil filter, air filter, fuel filter, filters, clutch wear parts, cables, drive belt, chain, spark plug, any part made from rubber, belts, brake linings and/or pads, batteries, sprockets, external springs, clips, nuts, bolts and fasteners.
HANDLING OF WARRANTY CLAIMS:
FOR PARTS: All Parts warranty issues must be processed through https://motobuys.com/pages/part-request  or if directed by the manufacturer. You must produce a copy of your original invoice showing the model number, vehicle identification number and date of purchase on the invoice, as well as a copy of your Consumer Motor Vehicle Delivery Preparation and Inspection Form to warranty your product directly. All defective parts must be returned to MOTOBUYS.com or the manufacturer as directed for inspection and verification of defect. MOTOBUYS.com reserves the right to decline any warranty claim based on the criteria listed in the COVERAGE AND LIMITATIONS portion of this warranty.
FOR ENGINES: All Engine warranty issues must be processed through MOTOBUYS.com or if directed through the manufacturer of the unit purchased. In ether case, after obtaining an RMA number from MOTOBUYS.com, you will be provided with a return shipping label. The motor must be removed from the vehicle, safely packaged and shipped to our repair facility located at the address listed on the shipping label. MOTOBUYS.com or the manufacturer reserves the right to decline any warranty claim based on the criteria listed in the COVERAGE AND LIMITATIONS portion of this warranty.

Assemble Video