✦ Published
Thumpstar 85
The Thumpstar 85 emerges as a noteworthy contender in the competitive youth motocross segment. While Thumpstar has a history of producing accessible off-road machines, the 85 represents a focused effort to provide a capable platform for aspiring racers. It slots into a category often dominated by established players, directly competing with models like the KTM 85 SX and the Kawasaki KX85, offering an alternative for riders transitioning from smaller bikes or seeking a robust entry into serious off-road riding.
At its core, the Thumpstar 85 is powered by an 85.0 ccm (5.19 cubic inches) two-stroke engine, a common displacement for this class, designed to deliver punchy power delivery suitable for motocross tracks. This powerplant is paired with a fuel tank capacity of 5.00 litres (1.32 US gallons), providing adequate range for practice sessions and race days without constant refueling. The engine's design prioritizes responsiveness and strong mid-range torque, crucial for clearing jumps and accelerating out of corners on challenging dirt courses.
Riding characteristics of the Thumpstar 85 are geared towards agility and control, essential for young riders developing their skills. Its lightweight chassis and nimble handling allow for quick changes in direction, which is vital on tight tracks. The suspension components are typically set up to absorb impacts from jumps and rough terrain, offering a balance of comfort and control. Riders can expect a relatively aggressive, attack-oriented rider triangle, consistent with motocross machines, encouraging proper body positioning for optimal bike control.
The Thumpstar 85 is primarily aimed at junior riders who are serious about motocross and are ready to step up to a more powerful and capable machine. It serves as an excellent training tool for honing racing skills before moving on to full-sized bikes. Its specifications suggest a bike that is built for performance on the dirt, making it a suitable choice for competitive youth racing or dedicated off-road enthusiasts. The Thumpstar 85 presents a compelling option for those seeking a dedicated motocross bike with a focus on performance and durability within its class.
✅ Why buy this bike?
• Affordable entry-level dirt bike, making it accessible for young riders and beginners. • Lightweight and nimble chassis facilitates easy handling and maneuverability for smaller riders. • Reliable air-cooled 85cc engine provides predictable power delivery suitable for learning. • Durable construction generally withstands typical abuse from new riders and off-road use. • Simple mechanics make maintenance and basic repairs relatively straightforward for owners. • Decent aftermarket support for common wear items and minor performance upgrades.⚠️ Things to consider
• Limited power output compared to Japanese rivals, hindering competitive performance. • Suspension components are basic, offering less adjustability and performance over rough terrain. • Resale value is significantly lower than established brands, making future upgrades costly. • Component quality can be inconsistent, potentially leading to premature wear or failures. • Brakes, while functional, lack the stopping power and feel of higher-end dirt bikes.Rule of thumb: under 125cc / 15HP → A1, under 47HP → A2, above → A.
Estimated average for 85cc class: 75-100 mpg (2.5-3.5 L/100km)
⛽ Tank: 5.00 litres (1.32 US gallons)
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