Motocross Bikes
2020Thumpstar MX 85
16 fields on record
The 2020 Thumpstar MX 85 is a lightweight two-stroke pit bike designed for young riders and beginners learning motocross fundamentals. Known for its agile handling and compact frame, it delivers accessible performance with adjustable suspension and reliable carburetor fueling. Its durable steel-rimmed wheels and simple kick-start system make it an ideal entry-level machine for off-road training.
- Capacity
- 85.0 ccm
- Engine
- Single, two-stroke
- Gearbox
- Not on record
Know it? Add it → - Dry weight
- Not on record
Know it? Add it → - Seat height
- Not on record
Know it? Add it → - Power
- Not on record
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How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- It is built purely for off-road motocross-style riding on dirt tracks and trails, not for commuting or road use.
- Built for
- It rewards an energetic, throttle-happy riding style since two-stroke minibikes reward revs, momentum, and aggressive lightweight cornering.
- Not ideal for
- It is not suitable for taller or heavier adult riders, highway travel, touring, or anyone seeking comfort and long-distance stability.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Engine
- Capacity
- 85.0 ccm
- Engine type
- Single, two-stroke
- Bore x stroke
- 49.0 x 47.0 mm
- Fuel system
- Carburettor
- Starting
- Kick
- Power
- Not on record - add it
Transmission
- Clutch
- Centrifugal
Dimensions & weight
Chassis & suspension
- Frame
- Central-Tube Frame with Double-Cradle
- Front suspension
- Adjustable Upside Down VS1 Forks
- Rear suspension
- VS1 PDI Mono Shock
- Front wheel travel
- 205 mm
- Rear wheel travel
- 185 mm
Brakes & wheels
- Front brakes
- Single disc. Dual Pot Calipers
- Rear brakes
- Single disc
Other
- Color options
- Green/Black/White
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
Rider Reviews
Common questions
What is the engine size of the Thumpstar MX 85?
The 2020 Thumpstar MX 85 has a Capacity of 85.0 ccm (5.19 cubic inches).
Shop this bike
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The 2020 Thumpstar MX 85 is a high-performance motocross bike that will impress riders of all skill levels. With a powerful 85cc engine and responsive handling, this bike offers a thrilling ride on the track or off-road trails. The lightweight frame and durable components make the MX 85 a top choice for anyone looking for a reliable and capable motocross machine. Whether you're a beginner looking to improve your skills or a seasoned rider seeking a competitive edge, the Thumpstar MX 85 delivers an outstanding performance that will exceed your expectations.
In conclusion, the 2020 Thumpstar MX 85 is a fantastic choice for motocross enthusiasts looking for a high-quality bike at an affordable price. Its powerful engine, responsive handling, and durable construction make it a top contender in the 85cc motocross bike category. Whether you're hitting the track or tearing up the trails, the MX 85 offers a thrilling ride that will impress riders of all skill levels. With its impressive performance and reliability, the Thumpstar MX 85 is a fantastic choice for anyone looking to take their motocross experience to the next level.
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