GASGAS
MC 125

Built in, not stuck on

Graphics

Red, with black where it counts. The graphics are in-mould (IML), so they are part of the plastic rather than a sticker on it — they do not peel at the edges or fade under the pressure washer, and the white logo still reads from the far side of the track after a season. Seat cover, handlebar and rims are blacked out to match.

Grip it with your knees

Bodywork

Smooth-profile bodywork with large contact surfaces at the knees and shins, so you grip the bike with your legs and move around it without catching on a step or an edge. The seat cover is black and properly grippy — under hard acceleration you stay where you put yourself, not sliding back towards the fender.

Hold on, not too tight

Neken handlebars

Black Neken aluminium bars, Ø 28/22 mm tapered, in mounts with a larger contact area against the bar so they are less likely to twist when you go down. Lock-on ODI grips in a medium compound — no glue, no wire, a two-minute swap between motos. A comfortable set-up is not a luxury; arm pump is where the last five minutes go.

Breathe in deep

Airbox

One-piece air intake, stiff enough not to deform under load, so the engine gets a clean, unrestricted feed of air without exposing the filter. Filter mounting is tool-free: pull the left side panel, check, clean or replace, done. Less time on the stand, more time with the gate in front of you.

Boot hold

Footpegs

Large-surface footpegs for grip when you are standing, mounted so they are less likely to catch the edge of a deep rut or a take-off when you scrub. Light, and shaped so mud does not pack around them — a peg that has turned into a lump of clay is not a peg any more.

No jets

Electronic fuel injection

Throttle-body injection — a 39 mm Keihin body working with the ECU to meter fuel and air for altitude and temperature on its own. Crisp, clean running and smooth, strong power, with no jetting between the paddock and the mountains. A protection cap over the CPC fuel connector keeps dirt out of the one joint you do not want to fail, and the in-line fuel filter stays easy to reach for servicing.

• 124.8cm³
• 39 mmKeihin EFI
• 92.5 kgwithout fuel

Ports, electronically

Cylinder and piston

With injection, the traditional two-stroke power valve gives way to an electronic exhaust control system. The lateral exhaust ports open slightly ahead of the main port, which is what turns a 125's narrow hit into strong, usable power — and does it with maximum reliability. 54 mm bore, 54.5 mm stroke.

Six, by Pankl

Transmission

A close-ratio six-speed gearbox made by Pankl Racing Systems — positive gear changes, reliability and quality as good as it gets. On a 125 the gearbox is half the lap time, and this one lets you keep the engine where it works. The lever tip is shaped so it does not pack with dirt in deep, sticky ruts.

Light, balanced

Crankshaft

A light crank that picks up revs the way a 125 should, balanced so vibration stays out of the bars and pegs. It sits where its rotating mass has the least effect on handling and the most on centralisation — the engine feels small because its weight is in the middle of the bike.

Thin walls, strong case

Crankcases

High-pressure die-cast crankcases: thin walls, high strength, lowest possible weight. The internals are placed so every shaft sits as close to the centre of gravity as it will go — the case is part of how the bike handles, not just a box for the gears.

Slim pipe, clear ruts

Exhaust system

A slim expansion chamber made with a manufacturing process that lets it be shaped for ground clearance as well as flow — the header stays out of the ruts instead of being flattened by them. The silencer has a clever internal construction that keeps the noise down without giving the power back. On a two-stroke the pipe is half the engine; this one is built like it.

Steel, single piece

DS clutch

A Diaphragm Steel clutch: robust, reliable and part of why the engine is as compact as it is. The basket is CNC-machined from a single piece of steel for longevity, and a single diaphragm steel pressure plate replaces the traditional coil springs — consistent feel at the lever, and plates that wear evenly.

Small, light, fast

Engine management

A Vitesco Technologies engine management unit — small, light and quick at processing what the sensors tell it. Built in is a rollover sensor that cuts the ignition in a big crash, and it feeds the hour meter the service schedule is written in. The two-strokes also carry an improved wiring layout, so the harness is no longer the part that wears first.

Pick your power

Map Select Switch

Two maps on a bar-mounted switch, fitted as standard on the 125. Map 1 is the standard map — leave it engaged on hard-pack and slick tracks where traction is scarce. Map 2 is for sand and deep, muddy tracks where the engine can use more. One press on the bars, on the line or in the gate.

Direct response

39 mm throttle body

A 39 mm Keihin throttle body with the injector positioned for the most efficient flow of mixture into the combustion chamber. The throttle cable mounts directly to the body, so the response is instant — what your wrist does, the engine does.

Press and go

Electric start

Electric start, every time, with the engine-stop button in the same housing as the start button to keep the bars clean. The lithium-ion battery weighs roughly a kilo less than a lead battery, so the convenience costs you nothing on the scales. Stall in a rut, press, go.