2021 Gas Gas MC 85 Technical Analysis & Specification Breakdown
Built around Gas Gas's cross - motocross motorcycle platform, the 2021 Gas Gas MC 85 relies on a 84.9 cc (5.2 cu in) liquid-cooled single cylinder, two-stroke powerplant. Internal engine geometry specifies a bore and stroke of 47.0 x 49.0 mm (1.9 x 1.9 inches).
On the scales, the MC 85 measures 68 kg (150 lbs) dry. Rider ergonomics and chassis geometry center around a 875 mm (34.4 in) seat height — reflecting a long-travel chassis stance that favors ground clearance and off-pavement control, combined with a 1,137 mm (44.8 in) wheelbase engineered for quick, flickable steering geometry. The 5.2-liter (1.4 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Gas Gas archive, this model family spans 2 indexed model years from 2021 to 2022, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
875 mm (34.4 in)
Engine
Displacement84.9 ccm (5.18 cubic inches)
Engine TypeSingle cylinder, two-stroke
Bore x Stroke47.0 x 49.0 mm (1.9 x 1.9 inches)
Fuel SystemCarburettor
IgnitionMEDJ digital EMS
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchWet, multi-disc clutch, Formula hydraulics
Driveline1/2 x 5/16´ chain
Chassis
Frame Type25CrMo4 steel central-tube
Rake24.0°
Front SuspensionXACT 43 WP Upside-Down fork, Ø 43 mm
Front Travel280 mm (11.0 inches)
Rear SuspensionXACT WP PDS mono shock
Rear Travel315 mm (12.4 inches)
Wheelbase1137 mm (44.8 inches)
Ground Clearance377 mm (14.8 inches)
Wheels & Brakes
Front Tyre60/100-14
Rear Tyre80/100-12
Front BrakesSingle disc
Front Brake Ø240 mm (9.4 inches)
Rear BrakesSingle disc
Rear Brake Ø220 mm (8.7 inches)
WheelsMaxxis tyres
Dimensions & Weight
Dry Weight68.0 kg (149.9 pounds)
Seat Height875 mm (34.4 inches) If adjustable, lowest setting.
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.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
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.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
