What to do after buying a used motorcycle: the first 30 days

Before you start

Get the owner’s manual for your exact model and year before you touch a spanner. If it did not come with the bike, the manufacturer or a dealer can usually supply one, and the maintenance schedule in it is the reference for everything below. Look up the model in the motorcycle catalog too, so you can see its intervals side by side.

You will need basic hand tools, a torque wrench, a drain pan, a tire pressure gauge and a multimeter. Spread the work over two or three weekends rather than one long day: a fluid change done in a hurry is how drain plugs get overtightened.

Why “unknown” means “reset”

A service record you cannot verify is a guess. The seller may have changed the oil last month, or may believe they did. Either way, you cannot plan the next service from it.

The first month of ownership is about replacing guesses with dates. Every job you do now, with the date and odometer reading written down, becomes the starting point for its own interval. After that, the maintenance schedule works as intended: the next oil change is a known distance or time away, not a question.

This is also why the order matters less than the record. Do the oil and filter first because it is quick and tells you a lot: note the color and smell of what comes out, and look at the drain plug magnet or the filter for metal. Then work outward to brakes, coolant, chain and tires.

Fluids: oil, brakes, coolant

Engine oil. Use the viscosity and specification in your manual. The fluids and spark plugs tool looks up oil, coolant, fuel capacity and spark plug specs for real models, so you can cross-check the manual before you buy parts.

Brake fluid. DOT 3, DOT 4 and DOT 5.1 fluids absorb moisture from the air over time, which lowers their boiling point. That is why many manufacturers set brake fluid replacement by time rather than distance, commonly every 2 years. Your manual has the exact interval and fluid type. Brakes are a safety system: if you have not bled brakes before, have a qualified mechanic do it.

Coolant. Check the level only with the engine cold. The corrosion inhibitors in coolant wear out with age, so if there is no record, replace it on the manual’s schedule. Use the coolant type the manual specifies.

Chain, tires and battery

Chain. Clean it, lube it, then measure slack at the midpoint of the lower run with the bike positioned as the manual describes. The specification is model-specific and is often printed on a label on the swingarm. Check the sprockets while you are there: hooked teeth mean chain and sprockets get replaced as a set.

Tires. Read the DOT date code on the sidewall: the last four digits are the week and year the tire was made. A tire can have plenty of tread and still be old enough to have hardened. Set pressures cold, before riding, to the figures in your manual.

Battery. A multimeter tells you more than whether the bike starts. A fully charged 12 V lead-acid battery rests at about 12.6-12.8 V; lower than that after a full charge suggests a tired battery. With the engine running, the reading should rise to the charging voltage in your service manual. Lithium starter batteries have different figures, so check the battery maker’s data.

By bike type

• Enduro and MX: set your intervals in engine hours, not kilometers - the manual’s schedule for oil, air filter and top-end work is written that way. Clean and re-oil a foam air filter before the first ride.
• Chain, belt or shaft: a chain needs cleaning, lube and slack checks. A belt needs a tension and condition check per the manual. A shaft drive has final-drive oil with its own change interval.
• Electric: there is no oil or plugs, but brakes, tires, bearings and coolant (on liquid-cooled drivetrains) still apply. Charge to full with the supplied charger and note the range the bike shows as your baseline.
• Scooters: the CVT belt and rollers are wear parts with a manual interval. With no record, have them inspected.

When to call a mechanic

Hand the job over if you find metal on the drain plug, milky oil, coolant loss you cannot trace, a brake lever that feels soft after bleeding, or a steering head that feels notchy. Anything involving brakes, steering or fuel leaks belongs with a qualified mechanic unless you have done that work before. A workshop invoice also makes a clean first entry in your log.

Make the reset stick

Add the bike in Garagely and its model service intervals are filled in, tracked in km, engine hours or months depending on the part. Log each baseline job with its date and reading, and reminders count down from there. When you want a printable record, the service book turns that log into a PDF.