TrailMaster SX125 Pro Series Dirt Bike - Electric Start, 4-Speed Manual, Dual Disc Brakes
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TrailMaster SX125 Pro Series Dirt Bike - Electric Start, 4-Speed Manual, Dual Disc Brakes
Description
The TrailMaster SX125 Pro Series is a high-end mid-size dirt bike built for riders who demand serious performance without stepping into a full-size machine. Developed in partnership with JHL Offroad, it is powered by a proven Zongshen BS125 single-cylinder, four-stroke, air-cooled 125cc engine producing 6.3hp - delivering punchy, reliable power on every trail. A 4-speed manual transmission puts full control in your hands, while both electric and kick start options mean you're never left stranded in the field.
Built around a high-quality steel frame with a new design optimized for performance, the SX125 Pro rides on large 19"/16" alloy rims with Yuanxing tires and stops on a dime with superior front and rear disc brakes. The inverted front fork and nitrogen air-gas rear shock with aluminum linkage keep the ride composed over rough terrain, while the 32.7" seat height and wide non-slip seat make it accessible to a broad range of riders. Whether you're a beginner working up to the trails or an experienced rider looking for a capable and affordable 125, the SX125 Pro Series delivers the goods.
Key Features
- Zongshen BS125 Engine: Single-cylinder, four-stroke, air-cooled 125cc engine producing 6.3hp at 7,500 RPM - a well-known and reliable powerplant in the off-road world.
- Electric and Kick Start: Both start options are included, giving you convenience at the push of a button and a reliable backup in any situation.
- 4-Speed Manual Transmission: Four-gear, non-circulate chain drive transmission for full rider control on varied terrain.
- Dual Disc Brakes: Superior quality front and rear disc brakes provide confident, consistent stopping power in all conditions.
- Inverted Front Fork: High-performance inverted front shock absorber improves handling rigidity and front-end feel on rough trails.
- Nitrogen Rear Shock: Nitrogen air-gas rear shock absorber with alloy upper and lower connector provides a smooth, composed ride over bumps and jumps.
- 19"/16" Alloy Wheels: Large front and rear alloy rims with reinforced alloy hubs and Yuanxing tires for durability and grip.
- 32.7" Seat Height: Comfortable for a wide range of rider sizes, with a wide non-slip seat design for confident control.
- Alloy Handlebar and Triple Clamps: Full alloy handlebar, upper and lower triple clamps, and foldable handle levers for a premium feel and crash durability.
- Stainless Steel Exhaust: Performance stainless steel muffler for improved flow and long-lasting corrosion resistance.
- Lightweight Build: Net weight of just 189.2 lbs makes the SX125 easy to handle and maneuver on and off the trail.
Shipping
This product requires additional shipping. If you'd like a quote before you purchase, fill out the form on this page or email us at service@omahasportsandgames.com for a delivery ETA or to confirm shipping details.
What's Included
- TrailMaster SX125 Pro Series Dirt Bike (your choice of Red, Blue, or Green)
Why You'll Love It
The SX125 Pro Series represents TrailMaster's commitment to delivering genuine off-road capability at a price that makes sense. The Zongshen engine is a trusted name in 125cc performance - well-supported, proven reliable, and capable of holding up to regular hard riding. The dual disc brakes, inverted fork, and nitrogen rear shock are features you'd expect on bikes costing significantly more, and they make a real difference the moment the trail gets rough.
With a lightweight frame, accessible seat height, and both electric and kick start, this bike fits a wide range of riders - from teens building confidence to adults who want a nimble and capable trail machine. Built in partnership with JHL Offroad, the SX125 Pro benefits from real dirt bike DNA, not just off-road aesthetics. If you're looking for a well-equipped 125cc dirt bike that punches well above its weight class, the TrailMaster SX125 Pro Series is a decision you'll feel good about every time you hit the trail.
Product Specifications
View Product Specs
| Engine Type | Zongshen BS125 Single cylinder, four-stroke, air-cooling |
|---|---|
| Displacement | 123.67 ml |
| Max Power | 6.3 hp / 7500 RPM |
| Max Torque | 8.8 Nm / 5500 RPM |
| Compression Ratio | 9.0:1 |
| Shift Type | Four gear, non-circulate gear |
| Start Type | Electric and Kick Start |
| Ignition | CDI |
| Transmission | Chain Drive |
| Minimum Turning Radius | 1900 mm |
| Lubricant Type | SF15W/40 |
| Overall Size (L x W x H) | 71.31 x 29.16 x 43.34 in / 1810 x 740 x 1100 mm |
| Wheelbase | 49.25 in / 1250 mm |
| Seat Height | 32.70 in / 830 mm |
| Ground Clearance | 13.39 in / 340 mm |
| Fuel Capacity | 1.56 Gal. / 6 L |
| Wheels | Alloy 19/16 Rims, Alloy Hubs |
| Tires | YUANXING FT: 70/100-19 / RR: 90/100-16 |
| Frame | High quality Steel Frame |
| Front Fork | Inverted, non-Adjustable |
| Rear Shock | Alloy U&D connector, non-Adjustable, Nitrogen Air-Gas |
| Triple Clamps | Alloy |
| Handlebar | Alloy and Foldable |
| Front Brake | Disc |
| Rear Brake | Disc |
| Exhaust | Stainless Steel |
| Net Weight | 189.2 lbs / 86 kg |
| Gross Weight | 237.6 lbs / 108 kg |
| Packing Size | 63.82 x 17.92 x 33.49 in / 1620 x 455 x 850 mm |
FAQ
Is the SX125 Pro Series suitable for beginners?
Yes - the SX125 Pro Series is a great fit for beginner to intermediate riders. The 125cc engine delivers manageable power, the seat height of 32.7" works well for a wide range of riders, and having both electric and kick start makes it easy to get going. That said, because it features a 4-speed manual transmission, riders who have never operated a clutch before should spend some time learning the basics before heading out on the trail.
What is the age or size recommendation for this bike?
TrailMaster designed the SX125 Pro Series as a mid-size option suited for older teens and adults. The 32.7" seat height and 189 lb weight are best managed by riders who can comfortably reach the ground and handle the bike's size. Always ensure the rider wears appropriate safety gear including a helmet, gloves, boots, and protective clothing.
Does this bike come assembled or does it require assembly?
The SX125 Pro Series ships partially assembled in a crate. Some assembly is required, including attaching the handlebars, front wheel, mirrors, and other components. Basic mechanical skills and standard tools are sufficient for most riders to complete assembly. A manual is included, and professional assembly at a local powersports shop is always an option if preferred.
How is this bike shipped?
The SX125 Pro Series ships freight on a pallet due to its size and weight. Curbside delivery is standard - the carrier will bring the pallet to your driveway or curb, and you will be responsible for moving it from there. Please contact us before purchasing if you have questions about delivery logistics or need a shipping quote for your area.
What colors are available?
The TrailMaster SX125 Pro Series is available in Red, Blue, and Green. Select your preferred color using the color selector on the product page before adding to cart.
Is this bike street legal?
No - the TrailMaster SX125 Pro Series is an off-road dirt bike and is not street legal. It is designed for use on private property, off-road trails, and closed-course riding only. Always check your local laws and regulations before riding.
| Specification name | Specification Value |
|---|---|
| Fuel supply | Gasoline |
| Item condition | New |
| Transmission type | Manual |
| Vehicle features | Headlights |