Minibike, cross · 2020
MX 85
Technical Overview
2020 Thumpstar MX 85 Technical Analysis & Specification Breakdown
At the heart of the 2020 Thumpstar MX 85 minibike, cross motorcycle, Thumpstar pairs a 85 cc (5.2 cu in) single cylinder, two-stroke architecture with road-focused gearing. Internal engine geometry specifies a bore and stroke of 49.0 x 47.0 mm (1.9 x 1.9 inches).
The 5-liter (1.3 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Engine
Displacement 85.0 ccm (5.19 cubic inches)
Engine Type Single cylinder, two-stroke
Bore x Stroke 49.0 x 47.0 mm (1.9 x 1.9 inches)
Fuel System Carburettor. Keihin PWK 28
Transmission
Clutch Centrifugal
Chassis
Frame Type Central-Tube Frame with Double-Cradle
Front Suspension Adjustable Upside Down VS1 Forks
Front Travel 205 mm (8.1 inches)
Rear Suspension VS1 PDI Mono Shock
Rear Travel 185 mm (7.3 inches)
Wheels & Brakes
Front Brakes Single disc. Dual Pot Calipers
Rear Brakes Single disc
Wheels Steel Rim
Dimensions & Weight
Fuel Capacity 5.00 litres (1.32 US gallons)
Other
Starter Kick
Color Options Green/Black/White
More from Thumpstar
Buying Checklist
Before You Compare This Bike
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Rider Profile
Who Is This Bike For?
🌲
Best For
Off-Road & Adventure
Estimate
Ownership Cost Calculator
⛽ Fuel
per year
🔧 Maintenance
per year
🛡️ Insurance
per year
TOTAL
* Estimates only. Actual costs vary by country, riding habits, insurance provider and maintenance schedule.