Motorcycle MOT Guide: Checklist and Requirements

A motorcycle MOT is the roadworthiness test required for most bikes on UK roads. In Great Britain, motorcycles generally need their first MOT at three years old and then annually after that, checking lights, tires, brakes, steering, chassis, exhaust, and other safety items, but not engine performance or internal wear. Motorcycles in Northern Ireland are currently exempt from periodic MOT testing, but they must still be roadworthy.

Knowing what the tester actually looks at lets you fix the easy stuff at home and avoid a wasted test fee.

What the MOT Covers

The test is a snapshot of roadworthiness on the day, not a full mechanical health check. Testers work through a standard list that includes:

• Lighting: headlight, tail light, brake light, indicators, number plate light, and the beam alignment of the headlight
• Tires and wheels: tread depth, damage, correct size, and wheel bearing play
• Brakes: lever and pedal feel, pad and disc condition where visible, brake light operation
• Steering and suspension: headstock bearing play, fork seals, shock condition, handlebar security
• Frame and structure: cracks, corrosion, and security of the frame, swingarm, and stands
• Exhaust: security, condition, obvious leaks, and excessive noise
• General items: horn, chain and sprockets, fuel system security, VIN and registration plate

What It Doesn't Cover

What the test does not check is just as important. There is no compression test, no check of internal engine wear, no clutch slip test, and no assessment of how the bike actually rides. A bike can sail through its MOT and still have a tired clutch or a noisy top end. If you want a sense of what a full service covers beyond MOT items, see this motorcycle service guide.

Pre-MOT Checklist You Can Do at Home

Lights, Tires and Visible Wear

Start with lighting because it is the single most common fail point on motorcycles. Turn the ignition on and walk around the bike checking every bulb: headlight on both dip and main beam, both indicators front and rear, tail light, brake light (operated by both front and rear brake controls on most bikes), and the number plate light.

Safety: switch off the ignition before inspecting or changing any bulb or connector. A dim or flickering bulb often points to a bad earth or connector rather than a dead bulb, which is worth checking if a replacement bulb doesn't fix it, but leave wiring repairs to a qualified mechanic if you are unsure.

Check tire tread depth right around the circumference of the tire, not just at one point, since wear can be uneven. For motorcycles over 50 cc, the tread must be at least 1 mm deep across a continuous band covering at least three-quarters of the tread width and around the entire circumference. Different tread rules apply to mopeds up to 50 cc. Also check for cracking in the sidewall and embedded objects. A tire's date code is useful for judging its age, but it is not by itself the pass-or-fail measure at the test, which focuses on tread depth and visible condition.

Give the whole bike a visual pass for obvious wear: frayed cables, cracked mirrors, a loose or missing mudguard, and corrosion on the frame or swingarm. For chain condition and adjustment, this chain adjustment guide covers how to check slack and wear properly.

Safety: if you find a tire below the legal limit or with sidewall damage, do not ride on it, even to get to the test center. A failed tire at speed is a genuine emergency and not worth the risk to save a short trip.

Brakes and Steering Checks

With the bike on its stand, pull the front brake lever and press the rear brake pedal, checking that each one feels firm with no excessive travel or sponginess. A spongy lever can indicate air in the hydraulic system, while one that keeps sinking under steady pressure can indicate a leak or failing seal. Do not ride until the fault has been diagnosed.

Safety: this guide to bleeding motorcycle brakes explains how air gets into the lines and how to remove it, though if you are not confident working on brakes, hand this job to a qualified mechanic, since brakes are not a system to guess at.

Look at the brake pads through the caliper window if visible, and check the disc surface for deep scoring or a lip at the edge of the wear track, which indicates the disc is thinning. Check brake fluid level in the reservoir against the min and max marks, and look at the fluid color through the sight glass. Discolored or cloudy fluid is worth a closer look by a qualified mechanic rather than a guess based on color alone.

Check steering by supporting the bike so the front wheel is safely off the ground, using a stand or lift designed for that purpose, then turning the bars lock to lock and feeling for notchy spots or resistance that suggest a worn headstock bearing. With the wheel still off the ground, grab the forks and try to rock them front to back to check for play in the headstock or fork bushes. Finally, test the horn, then operate the front brake lever and rear brake pedal separately to check that each one activates the brake light.

Safety: steering and brakes are not areas for guesswork. If you find play in the headstock bearing or anything odd in how the bars turn, get it looked at by a mechanic rather than riding to the test center and hoping for the best.

Exhaust, Chain and Fuel System Checks

Check the exhaust for secure mounting, no visible cracks or holes in the pipe or silencer, and no oil or fuel residue suggesting a leak nearby. Start the bike and listen for unusual rattling. A system that is excessively loud, such as an aftermarket setup missing its baffling or db killer, can fail on noise grounds.

Inspect the fuel system for leaks around the tank, fuel lines, and carburetor or injector body, looking for wet patches, staining, or a fuel smell when the bike has been standing. Safety: a fuel leak near a hot exhaust or ignition source is a fire risk, so if you smell fuel or see staining, do not start the bike again until you have traced the source, and treat this as a job for a mechanic if you are not confident identifying the leak point yourself.

Check chain tension and lubrication, and look at the sprocket teeth for the hooked or shark-fin shape that signals excessive wear. A chain that is too tight or too loose can affect handling and, in bad cases, snap or jump the sprocket.

Finally, confirm your number plate is legible, correctly sized, and securely fitted, and that the VIN is visible and matches your registration documents.

When to Book and What to Expect

Book the MOT within the month before expiry so you don't lose unused time on your current certificate. Bring your V5C logbook if you have it, though it is not strictly required, and arrive with a clean bike since testers need to see components like brake discs and tires without a layer of road grime in the way.

For questions about your own bike, MotoDoc lets you choose the make, model and year, then ask by text or voice and attach a photo of a part or a warning light.

Your result lists any defects as dangerous, major, or minor. Dangerous and major defects fail the test. Minor defects do not, but should still be repaired. A dangerous defect means you must not ride the bike at all until it is fixed. A major defect is serious and should be repaired promptly, but whether you can ride away legally depends on whether your existing MOT remains valid and the bike is still roadworthy, so ask the test center to clarify your result. If in doubt, arrange transport home instead of riding back.