GASGAS
MC 85 19/16

Electronic Red

Frame

High-strength steel frame inspired by the full-size motocross bikes: geometry that is stable in a straight line and sharp in the corners, with a flatter steering head angle and a wider turning radius for precise handling. The rear shock mount is designed to absorb big hits, and red frame protectors with a textured surface add grip and keep the glossy Electronic Red finish intact.

One piece

Subframe

One-piece subframe in polyamide-glass-fibre-reinforced aluminium: less weight, more rigidity and better rider feedback than a bolted-together assembly. Its compact design helps centralise mass, which shows up as sharp handling and slim ergonomics at the back of the bike. One component, no joints to work loose.

17 mm and sealed

Triple clamps

Forged triple clamps with the flex worked out so the front end stays smooth and controlled when the track gets rough. A sealed top nut keeps dirt and water out of the steering-head bearings, and its compact 17 mm size means the one wrench in the toolbox does the job.

Flatter, wider

Steering head

A flatter steering head angle — 63.5° — and a wider turning radius are what make the 85 handle the way it does: stable at speed, and easy to carve through a corner without the front tucking. Sharper lines, smoother control, and a rider who trusts the front end enough to commit.

Punch, then pull

Engine

84.9 cm³, 47 mm bore, 48.95 mm stroke, with a strong low- and mid-range punch and a proven top end — everything a young rider needs to push hard. The engine layout centralises mass for balance, a controlled exhaust valve and a six-speed gearbox keep the power flowing, and it is light and responsive. Built for getting on the gas.

• 84.9cm³
• 6-speed
• 69 kgwithout fuel

Two maps

Mapping

Two engine maps. The standard one works on almost every circuit; when the track is heavy or sandy, unplugging a connector under the fuel tank activates a richer map. A handlebar-mounted Map Select Switch is available as a Technical Accessory so the change becomes a button press on the bars — ask us to spec it with the bike.

Power valve

Cylinder and piston

A cylinder with a power-valve system controlling both the main exhaust valve and the sub exhaust port. That is where the strong mid-range and torque come from — an 85 that is easier to ride, with less clutch work needed when the track gets deep and loose, and a rider who can carry a gear out of the corner instead of hunting for one.

Learn to shift

Transmission

A manual six-speed built for durability and smooth shifting. A self-cleaning gear selector keeps working in mud, and the forged shift lever has a foldable tip and a no-dirt design, so it survives a crash and still finds the next gear on the last lap of a wet moto.

Balanced

Crankshaft

Precisely balanced to cut vibration and improve engine feel through the bars and pegs. Its mounting position makes it straightforward to get at, so a crank service is less time in the garage — for parents and mechanics alike — and more time on the gas.

Thin walls, strong case

Crankcases

High-pressure die-cast crankcases with wall thickness kept to a minimum while keeping the strength and durability an 85 season demands. The compact design puts the internal shafts as close as possible to the bike's centre of gravity — the same casting logic as the full-size engines, and part of why the 85 handles the way it does.

No seams inside

Exhaust system

A smooth-flowing expansion chamber with no internal weld seams, so the gas has nothing to trip over and the power comes cleanly across the rev range. Finished with a black-anodised silencer. On an 85 the pipe is half the engine, and this one is built like it matters.

Consistent bite

Clutch

A diaphragm-spring clutch — a single diaphragm steel pressure plate instead of coil springs — worked by a light Formula hydraulic system that needs no adjustment and gives a consistent bite point every lap. Reliable and robust, so squeezing the last of the power out of the engine when the flag is in sight is easy, and a small hand gets the same lever every time.