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2025 Thumpstar TSX125
Thumpstar
$2,099.00
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$2,399.00
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Thumpstar
2025 Thumpstar TSX125
Thumpstar TSX125cc GR (Version 5)
The Thumpstar TSX125cc GR is the ultimate mini bike for off-road enthusiasts, combining cutting-edge engineering, robust construction, and unparalleled performance. Designed for riders who demand strength, reliability, and agility, this bike has been completely reimagined for Version 5, addressing common issues found in other mini bikes and setting a new standard in the pit bike category. Every component has been meticulously redesigned, from the frame to the suspension, wheels, and engine, ensuring a superior riding experience.
Key Features:
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Tri-Bar Chassis Frame
The Thumpstar Tri-Bar Frame is a masterpiece of engineering, offering unmatched strength and agility. The frame features a Quad Bar design for enhanced durability, with added mounts for the caged airbox and a re-routed header pipe to prevent leg burns. The removable footpeg mounts and reinforced adjustable steering stop make it versatile for both casual riding and competitive racing. -
YX-R 125cc Engine
Powered by the YX-R 125cc engine, this bike delivers 11+ HP at the crank, providing the perfect balance of power and reliability. The Mikuni VM22 26mm carburetor ensures smooth fuel delivery, while the Pipe Bomb 2.0 head pipe optimizes exhaust flow for improved low-end torque and top-end performance. -
Linkage Suspension System
A first in the mini bike category, the rear linkage suspension is scaled down from full-size race bikes, offering a smoother ride, better cornering, and increased comfort. The VS1 front forks and VS1 linkage U shock provide exceptional stability and control, whether you're tackling bumps, ruts, or jumps. -
AK7 Wheels with 20mm Rear Axle
The AK7 wheels feature 7075 alloy rims, stainless steel spokes, and a 20mm hollow rear axle for maximum strength and durability. The 6-bolt sprocket and 4-bolt disc design ensure reliable performance, while the rim lock prevents tire slippage during aggressive riding. -
Caged Airbox with Dual-Layer Filter
The Thumpstar airbox is a game-changer, offering superior air filtration and increased airflow to the engine. The dual-layer filter keeps harmful particles out, ensuring your engine runs smoothly and efficiently. -
Waterproof Electronics
The bike is equipped with heavy-duty multi-core wiring, waterproof connectors, and Revking CDI, Rectifier, and Coil, making it resistant to water and mud. This ensures reliable performance in all weather conditions. -
Ergonomic Design and Accessories
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56mm Wide Footpegs: Made from high-quality stainless steel for better grip and comfort.
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GoPro Mount: Capture every moment of your off-road adventures in stunning HD.
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MX Steezebar: Combines style and performance for a confident ride.
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3-Bolt Chain Guide: Ensures chain stability and minimizes derailment risk.
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Guards and V5 Front Plate: Provide essential protection while enhancing the bike's aesthetic appeal.
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Specifications at a Glance
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Engine: YX 4-Stroke, 125cc
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Gearbox: Manual, 4-speed (N1234)
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Top Speed: 90kph / 55mph (depending on gearing)
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Suspension: VS1 Inverted Forks (Front), VS1 Linkage U Shock (Rear)
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Brakes: 220mm Disc (Front), 190mm Disc (Rear)
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Wheels: 7075 Alloy Rims (Front: 70/100-14, Rear: 80/100-12)
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Weight: 80kg / 176lbs (Net), 90kg / 198lbs (Gross)
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Fuel Capacity: 3.4 Litres / 0.9 Gallons
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Why Choose the Thumpstar TSX125cc GR?
The Thumpstar TSX125cc GR is not just a mini bike; it's a statement of quality and performance. With its scratch-built components, advanced engineering, and rider-focused design, this bike is built to handle the toughest terrains while providing a comfortable and exhilarating ride. Whether you're a beginner or a seasoned rider, the TSX125cc GR offers the perfect blend of power, durability, and style.
Assembly
Troubleshooting
Service
Brochure
Engine Parts List
Parts Breakdown List
Instruction Manual
Suspension / Wheel
Graphic Template
Frame
Thumpstar Tri-Bar Chassis
With developments in chassis strengthening and design, Thumpstar's new Tri-Bar Frame allows the bike to feel more solid under foot while allowing the bike to perform with greater agility and comfort than ever before. Additions to the frame allow the header pipe to be re-routed under the frame, reducing the likeliness of pipe burns to the legs, include removable footpeg mounts, which can be easily replaced and allow the kickstand to be removed for racing, and a reinforced adjustable steering stop. The new frame is also capable of housing the new Thumpstar airbox, but it is not yet a stock option.
GoPro Mount
Carry Box
Don't let your off-road experiences go undocumented. With the GoPro DirtBike Mount, you can capture every twist, turn, and jump in stunning HD quality, allowing you to relive your adrenaline-fueled moments again and again. Gear up and take your footage to the next level!
Throttle
Likee Throttle
Boost your ride with precision control and ergonomic comfort. Built tough for rough trails. Unlock your bike's full potential today!
MX Steezebar
The ultimate blend of style and performance for your dirtbike. Get ready to ride with confidence and stand out from the pack!
V5 Front Plate
Elevate your bike's style while safeguarding essential parts. Upgrade now and enhance your ride's aesthetic appeal while adding crucial protection.
Wheels
AK7 Wheels
We’ve redesigned and strengthened our AK7 wheels to give you the comfort of knowing buckled rims and loose spokes are a thing of the past. The cast aluminium hub has been changed to run a 6-bolt sprocket and 4-bolt disc while moving to a 20mm axle that allows for oversized wheel bearings. We’ve swapped those stretch prone steel spokes for anti-stretch and snap resistant stainless spokes. And lastly, the rims have been upgraded to top-of-the-line aluminium alloy.
Suspension
VS1 Front Forks
Our new line of VS1 front forks provide a plush yet stable ride through all those bumps, ruts and jumps. Improved outers coupled with our reliable valving lets the front end to have a settled movement while allowing greater front wheel feedback, keeping the fork to be rigid while handling bigger impacts.
Header and Heaader
Pipe Bomb 2.0 head pipe
A redesigned frame came with requirements for a new exhaust header. The new Pipe Bomb 2.0 head pipe from Thumpstar allows exhaust gasses to expand, cool, and ramp back up at a higher velocity when exiting. This results in a greater bottom, and low-end response while keeping the tuning in check for the top end.
Linkage
Swingarm and Linkage developments
The new line of TSX bikes have received yet another significant upgrade which brings performance closer to that of full-size motorcycles, rear linkage. Rather than traditionally attaching the shock to the top of the swingarm, we have scaled and applied linkage shared with the likes of full-size race bikes to attach to the bottom of the swingarm. This improves handling in the rear and completely changes the riding experience of these bikes.
Engine
YX-R 125 Engine
Giving you the thump you need to get off the line and the punch that gets you out of the gate, the YX-R125 engine delivers a whopping 11+ HP at the crank. Precision engineering from Yin Xiang delivers a reliable and strong engine package that consistently gets the job done.
Airbox
One of our most exciting developments for 2020 was the design and production of our very own airboxes for the TSX and the TSB. Advances in 3D modelling and printing have allowed us to give you a system that provides much better air filtration with a dual-layer filter while increasing airflow to the engine. The airbox prevents harmful particles from entering your engine where traditional minibike foam filters would typically fail.
Waterproof Electronics
All of our new bikes come equipped with redesigned looms and electronics. We have done away with single flimsy wires and connectors and replaced them with heavy-duty multi-core wiring and sturdy connectors. Accompanied by water proof plugs and electronics such as the Revking CDI, Rectifier, and Coil, makes this is a far superior package to any of the competition.
Waterproof Switch
Designed to withstand the elements, our switch ensures reliable performance even in rain or mud. It's the perfect accessory for off-road adventures.
Rear Axle
We have increased our rear axle to 20mm and made it hollow, then heat treated it, which makes it a similar weight to the 15mm axle but much stronger. Finally, made it a Lockheed design so only need one 30mm spanner for removal.
Rear Shock
Boost your ride with enhanced stability and control. Crafted for off-road enthusiasts, our rear shock absorbs bumps and vibrations for a smoother ride.
3-Bolt Chain Guide
Maximize chain stability with ease. Engineered for durability and precision, our guide keeps your chain securely in place, minimizing the risk of derailment.
Guards
Stay protected and geared up with our durable guards! Upgrade your defense and ride with confidence!
Footpegs
Our new footpegs have been made 56mm wide, the same as aftermarket motocross 250/450 footpegs for better grip and rider comfort. We used high-quality stainless steel material for strength and to look fresh for years to come, finished off with perfectly fitting springs.
Free Spare Parts Kit
Product Packaging
Specifications
| ENGINE & TRANSMISSION | |
| Engine | YX | 4 Stroke |
| CC Rating | 125cc |
| Gearbox | Manual | 4 speed (N1234) |
| Starter | Kick |
| Carburetion | Mikuni VM22 26mm |
| Exhaust | Pipe Bomb DW1 | 38mm Exhaust System |
| Final Drive | PSC 6 Bolt Sprocket | 428 HD Chain |
| Top Speed | 90kph / 55mph (depending on gearing) |
| SUSPENSION, BRAKES, & WHEELS | |
| Suspension Front | VS1 Inverted Forks | Length 770mm | 45 / 48mm |
| Suspension Rear | VS1 Linkage U Shock | Length Adj 350mm (+10mm) |
| Brakes Front | 220mm Disc | HSK Dual Piston |
| Brakes Rear | 190mm Disc | HSK Single Piston |
| Wheel & Tire Front | 7075 Alloy Rim | 70/100-14 |
| Wheel & Tire Rear | 7075 Alloy Rim w/ Rim Lock | 80 / 100-12 |
| DIMENSIONS & WEIGHT | |
| Wheelbase (axle to axle) | 1260mm | 50" |
| Seat Height | 830mm | 33" |
| Product Weight N.W | G.W | 80 / 90 kg | 176 / 198 lbs |
| Tank Capacity | 3.4 Litres | 0.9 Gallon |
| Product Packing Size | 1420 x 430 x 640mm | 0.40m3 |
Thumpstar TSX125cc GR, 125cc mini bike, pit bike, off-road bike, YX-R 125cc engine, Tri-Bar Chassis Frame, AK7 wheels, VS1 suspension, linkage suspension, caged airbox, waterproof electronics, Pipe Bomb 2.0 exhaust, 20mm rear axle, 7075 alloy rims, MX Steezebar, GoPro mount, 56mm footpegs, 4-speed manual gearbox, 90kph top speed, off-road adventure bike, durable mini bike, Thumpstar Version 5, YX 4-stroke engine, Mikuni VM22 carburetor, heavy-duty pit bike, best mini bike 2025. Thumpstar TSX125cc GR, 125cc mini bike, pit bike, off-road bike, YX-R 125cc engine, Tri-Bar Frame, AK7 wheels, VS1 suspension, linkage suspension, caged airbox, waterproof electronics, Pipe Bomb 2.0 exhaust, 20mm rear axle, 7075 alloy rims, MX Steezebar, GoPro mount, 56mm footpegs, 4-speed manual gearbox, 90kph top speed, off-road adventure bike, durable mini bike, Thumpstar Version 5, YX 4-stroke engine, Mikuni VM22 carburetor, heavy-duty pit bike, best mini bike 2025.
- Engine Size:
- 125cc
- Transmission:
- Manual
- Start:
- Kick Start
- Front Suspension:
- VS1 Inverted Forks
- Rear Suspension:
- VS1 Linkage U Shock
- Axle Size:
- 20mm
- Wheel Sizes:
- 7075 Alloy Rims (Front: 70/100-14, Rear: 80/100-12)
- Seat Height:
- 33"
- If you want shipping quote call:
- 320-358-1994
- 0% Financing Available:
- Check out financing page
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