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Load image into Gallery viewer, new! TrailMaster MK125 Dirt Bike 4-Speed Manual Dual Disc Brakes, Electric Start (14/12), Ages 12 and up - GoKarts USA®

Load and play video in Gallery viewer, TrailMaster MK125 Dirt Bike 4-Speed Manual Dual Disc Brakes, Electric Start (14/12), Ages 12 and up

Cyber Sale

TrailMaster MK125 Dirt Bike 4-Speed Manual Dual Disc Brakes, Electric Start (14/12), Ages 12 and up

$1,399.44
$1,699.00

TrailMaster has partnered with JHL Offroad to unveil the MK125, a top-of-the-line mid-size dirt bike from their PRO-Series. The bike boasts a powerful Zhongshen 125cc 4-stroke 6.3hp engine that can be started with either kick start or electric start. With a seat height of 29.5" and a weight of just 149lbs, the MK125 is both lightweight and high-performing. It comes in three sleek colors - red, blue, and green. This model also includes a 4-speed manual transmission, along with front and rear disc brakes and inverted front shocks for optimal control.

Get even more premium features with our Pro-Series line, such as an Inverted front shock absorber, Nitrogen air gas rear shock absorber, performance stainless steel muffler, alloy foldable handle levers, alloy rims and hubs, high-quality front and rear disc brakes, and a state-of-the-art race suspension system for exceptional handling and maneuverability. Experience effortless key and kick starting with the Electronic CDI ignition, ensuring smooth operation in all gears and a powerful, consistent performance.

Features

Balanced Shaft ZS125 engine
Air-cooled, 4-stroke
Electric start, with kick backup
Low 29" seat height for smaller riders
Newly designed strong frame
Inverted front shock
Nitrogen air gas rear shock absorber
Aluminum linkage
Performance stainless steel muffler
Waterproof wire harness
Alloy foldable handle levers
Alloy wheels and hubs

Specifications

Engine Type	Zongshen Balanced Shaft 125 Single cylinder, 4-stroke , air-cooling
Displacement	123cc
Max Power	6.3/7500 (1±1.5%)
Max Torque	8.8/5500（1±1.5%）
Compression Ratio	9.0:1
Shift Type	F4-Speed, N1234
Start Type	Electric / Kick Start
Ignition	CDI
Min. Fuel Consumption:	≤367g/kw.h
Minimum turning radius :	1900 mm
Lubricant：	10W/40
Transmission:	Chain Drive

Overall Size (L x W x H)	632742"
Wheelbase	31"
Seat Height	29"
Ground Clearance	10.24"
Fuel Capacity	0.92 Gal.
Wheels	SteelRims, High Quality Alloy Hubs
Tires	YUANXING FT: 60/100 -14 - RR: 80/100 -12

Frame	High quality Steel Frame
Front Fork	Inverted front shock absorbers 43/45mm
Rear Shock	Rear none-adjustable mono shock
Upper and Lower Connecting Board	Alloy
Handle Lever	Foldable
Front Brake	Disc
Rear Brake	Disc
Exhaust	Stainless steel muffler

Packing Size	551733" inches
N.W/LBS	149 lbs
G.W/LBS	213 lbs

Circular Shifting: We have seen some bikes being sold that use circular shifting. We don't sell them. Circular Shifting means that when the bike is in 4th gear, if you shift up, it goes back into neutral, then 1st gear,

FAQ Accordion with Animation

Frequently Asked Questions

When will my order be shipped and how long does delivery take?

Orders containing in-stock items typically ship within 3–5 business days. Orders that include assembly will require 7–10 business days to prepare. Please note that during the holiday season (Thanksgiving through Christmas), processing times may be longer due to high order volume. Once your order has shipped, you’ll receive an email with tracking information. Most orders are shipped via Less Than Truckload (LTL) freight and generally arrive within 3–7 business days. Deliveries to remote areas (such as mountains, forests, valleys, or islands) may take longer. You can check the estimated delivery date on the carrier’s website using the tracking number we provide.

How your vehicle is shipped?

Unless otherwise noted, the vehicles we offer are shipped crated or on a pallet and do not come assembled unless you’ve selected our assembly service. Assembly typically requires a few basic tools and mechanical knowledge. If you're not confident in your ability to safely assemble a high-speed off-road vehicle, we strongly recommend selecting professional assembly or having it assembled by a local mechanic.

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Do you offer financing?

Yes. Buy-now-pay-later financing is available with our preferred partner, BreadPay® (please see their icon under product pricing for details).

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How can I get assistance if I have question on products?

Please call 888-886-5846 and talk to one of our knowledgeable sales representatives between 9am-3pm PST. Or send us email at orders@gokartsusa.biz.

What warranty is included with my purchase?

You're covered with confidence at GoKarts USA®. Your satisfaction is our top priority. Every purchase comes with manufacturer-backed warranty protection—including up to 12 months of engine coverage—to keep your ride running strong. TrailMaster products also include a 6-month parts warranty for added peace of mind.

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What does 95% or 98% Assembly Mean? What do I need to assemble if shipped in crate?

For shipping safety, most vehicles cannot be fully assembled prior to delivery.

Minor assembly is required—this typically includes installing mirrors, connecting the battery, adjusting handlebars, and other small components. Before operation, please ensure all screws and fasteners are tightened, engine fluids are at proper levels, and the battery is fully charged. Your factory warranty remains valid right out of the box.

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TrailMaster MK125 Dirt Bike 4-Speed Manual Dual Disc Brakes, Electric Start (14/12), Ages 12 and up

Features

Specifications

Frequently Asked Questions

Customer Reviews