TrailMaster SX125 Pro Series Dirt Bike, Electric Start, 4-Speed Manual, Dual Disc Brakes, (19/16) Wheels
The TrailMaster SX125 Pro Series Dirt Bike, introduced by TrailMaster in partnership with JHL Offroad, is a high-end mid-size option. Equipped with a dependable Zhongshen 125cc 4-stroke 6.3hp engine, it offers both kick and electric start options. The bike boasts a seat height of 32.7″, 19/16 wheels, and a lightweight build of just 189lbs. Available in red, blue, and green, the SX125 also features a 4-speed manual transmission, front and rear disc brakes, and inverted front shock.
Premium additions to the TrailMaster SX125 Pro-Series dirt bike include electric and kick start options, a powerful Zongshen 125cc engine, and a new frame design for optimal performance. The inverted front shock absorber and 33″ seat height make it suitable for various riders. The non-slip seat and nitrogen air gas rear shock absorber with aluminum linkage provide a comfortable ride, while the stainless-steel muffler and alloy handlebar and triple clamps ensure top-notch performance. Additionally, the bike features foldable handle levers, reinforced alloy rims and hubs, and superior quality front and rear disc brakes.
The TrailMaster SX125 Pro Series Dirt Bike Electric Start is expertly designed for the rider who values aggressive performance and instant operational readiness. The TrailMaster SX125 Pro Series features a powerful 125cc engine, premium, long-travel suspension, and convenient electric start ignition. This specialized bike delivers exceptional agility and robust power delivery, making it perfectly suited for both fast trail blazing and technical track riding, with the practical benefit of easy, reliable ignition.
| Specification | Details |
|---|---|
| Engine Type | Zongshen BS125, Single cylinder, four-stroke, air-cooling |
| Displacement | 123.67 ml |
| Max Power | 6.3/7500 (1+1.5%) |
| Max Torque | 8.8/5500 (1+1.5%) |
| Compression Ratio | 9.0:1 |
| Shift Type | Four gear, non-circulate gear |
| Start Type | Electric / Kick Start |
| Ignition | CDI |
| Min. Fuel Consumption | ≤367g/kw.h |
| Minimum Turning Radius | 1900 mm |
| Lubricant Type | SF15W40 |
| Transmission | Chain Drive |
| Overall Size (L × W × H) | 71.31 × 29.16 × 43.34 Inch / 1810 × 740 × 1100 mm |
| Wheelbase | 49.25 Inch / 1250 mm |
| Seat Height | 32.70 Inch / 830 mm |
| Ground Clearance | 13.39 Inch / 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 |
| Triple Clamps | Alloy |
| Handle | Alloy and Foldable |
| Front Brake | Disc |
| Rear Brake | Disc |
| Exhaust | Stainless |
| Packing Size | 63.82 × 17.92 × 33.49 Inch / 1620 × 455 × 850 mm |
| N.W / LBS | 189.2 LBS / 86 KGS |
| G.W / LBS | 237.6 LBS / 108 KGS |












Greer Solomon (verified owner) –
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