Product Description
Thumpstar TSR 140-C (V5 Model)
The Thumpstar TSR 140-C is the ultimate pit bike, meticulously redesigned for 2025 as the Version 5 (V5) model. This bike is a testament to Thumpstar's commitment to innovation, durability, and performance. Built from the ground up, the TSR 140-C is engineered to tackle the challenges of off-road riding, offering riders an unparalleled experience with its cutting-edge features, robust construction, and race-ready design. Whether you're a seasoned rider or a beginner, this bike delivers power, precision, and reliability like no other.
Key Features of the Thumpstar TSR 140-C
1. Revolutionary Tri-Bar Chassis Frame
The Tri-Bar Frame is a game-changer in pit bike design. Built with advanced strengthening techniques, this frame offers superior rigidity and agility, ensuring the bike feels solid and responsive underfoot. Key enhancements include:
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Re-routed Header Pipe: Reduces the risk of pipe burns by running the exhaust under the frame.
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Removable Footpeg Mounts: Allows easy replacement and removal of the kickstand for racing.
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Adjustable Steering Stop: Provides customizable handling for different riding styles.
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Airbox Compatibility: Designed to house Thumpstar's advanced caged airbox for improved airflow and filtration.
2. AK7 Wheels: Strength Meets Style
The AK7 Wheels have been completely redesigned for durability and performance:
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20mm Hollow Rear Axle: Heat-treated for strength while maintaining a lightweight design.
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Stainless Steel Spokes: Anti-stretch and snap-resistant for long-lasting reliability.
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7075 Alloy Rims: Top-of-the-line aluminum alloy rims for maximum strength and reduced weight.
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6-Bolt Sprocket & 4-Bolt Disc: Enhanced hub design for better power transfer and braking performance.
3. VS1 Suspension System
The VS1 Suspension ensures a smooth and controlled ride, whether you're hitting jumps or navigating rough terrain:
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VS1 Front Forks: Improved outer tubes and valving provide plush yet stable handling, with excellent feedback for precise control.
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VS1 Linkage Rear Shock: Scaled-down from full-size race bikes, this linkage system offers superior rear suspension performance, improving cornering, high-speed stability, and rider comfort.
4. YX-R 140 Engine: Power and Reliability
At the heart of the TSR 140-C is the YX-R 140 Engine, delivering 11+ HP at the crank:
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4-Stroke Manual Transmission: Smooth and reliable 4-speed gearbox (N1234) for precise control.
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Molkt VM22 26mm Carburetor: Optimized for performance and fuel efficiency.
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Pipe Bomb 2.0 Exhaust System: Enhances low-end torque and top-end power with improved exhaust flow.
5. Advanced Airbox Design
The Thumpstar Airbox is a standout feature, offering:
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Dual-Layer Air Filter: Provides superior filtration, protecting the engine from harmful particles.
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Increased Airflow: Enhances engine performance and horsepower.
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3D-Modeled Design: Precision-engineered for a perfect fit and optimal functionality.
6. Waterproof Electronics
The TSR 140-C is equipped with a redesigned electrical system:
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Heavy-Duty Wiring: Multi-core wiring and sturdy connectors for durability.
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Waterproof Components: Includes Revking CDI, Rectifier, and Coil for reliable performance in all conditions.
7. Ergonomic and Durable Components
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56mm Stainless Steel Footpegs: Wider for better grip and rider comfort, made from high-quality stainless steel for long-lasting durability.
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220mm Front & 190mm Rear Disc Brakes: HSK dual-piston (front) and single-piston (rear) brakes for exceptional stopping power.
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3.4L Fuel Tank: Compact yet efficient for extended riding sessions.
Technical Specifications
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Engine: YX 140cc, 4-Stroke
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Gearbox: Manual, 4-Speed (N1234)
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Carburetor: Molkt VM22 26mm
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Exhaust: Pipe Bomb DW-1, 38mm
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Suspension: VS1 Inverted Forks (Front), VS1 Linkage Rear Shock
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Brakes: 220mm Front Disc, 190mm Rear Disc
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Wheels: 7075 Alloy Rims (Front: 70/100-14, Rear: 80/100-12)
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Weight: 80kg (Net), 90kg (Gross)
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Seat Height: 880mm (35")
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Top Speed: 90kph (55mph)
The TSR140-C has received a complete overhaul for Version 5. Gone are the days of facing struggles of dealing with issues which are common on many other minibikes. We have gone back to the drawing board and scratch built a New Frame, Airbox, Linkage Suspension, Hubs and Rims, and much more. This has not only allowed our bikes to become stronger and more reliable, but also gives the rider peace of mind knowing, no detail has been left untouched.
Our design team has produced a piece of engineering art. The frames are a new Quad Bar, which has made them stronger than ever. Along with the frame developments, we made space and rigged them with mounts to accommodate our new caged airboxes. This allows a better air filtration system while increasing airflow into the carburetor, and in turn, more horsepower. A first on pit bikes and minibikes alike, we have scaled down the linkage from the likes of a full-size race bike and fitted it to these smaller sized 110s. The linkage provides a much smoother ride than traditional PDS style suspension, which allows for faster cornering, high and low-speed adjustments, and increased rider comfort. We have redesigned our hubs and created space for a much heavier duty 20mm rear axle, coupled with stainless spokes and alloy rims, which provide our strongest wheels to date. Check out our description video and the following spec lists to see these upgrades!
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.
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 aluminum 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 aluminum alloy.
Suspension
VS1 Front Forks
Our new line of VS1 front forks provides a plush yet stable ride through all those bumps, ruts, and jumps. Improved outers coupled with our reliable valving lets the front end have a settled movement while allowing greater front wheel feedback, keeping the fork to be rigid while handling bigger impacts.
Header
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 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 140 Engine
Giving you the thump you need to get off the line and the punch that gets you out of the gate, the YX140 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 modeling 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 waterproof plugs and electronics such as the Revking CDI, Rectifier, and Coil, makes this is a far superior package to any of the competition.
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.
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.
Brands
Product Packaging
Specifications
| ENGINE & TRANSMISSION | |
| Engine | YX | 4 Stroke |
| CC Rating | 140cc |
| Gearbox | Manual | 4 speed (N1234) |
| Starter | Kick |
| Carburetion | Molkt VM22 26mm |
| Exhaust | Pipe Bomb DW-1 | 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 | 880mm | 35" |
| Product Weight N.W | G.W | 80 / 90 kg | 176 / 198 lbs. |
| Tank Capacity | 3.4 Liters | 0.9 Gallon |
| Product Packing Size | 1420 x 430 x 640mm | 0.40m3 |
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