How to read a motorcycle's service history

Before you start

Get the maintenance schedule for the exact model and year from the owner’s manual - it is the reference every record is measured against. If the manual did not come with the bike, the manufacturer or a dealer can usually supply one. The motorcycle catalog shows service intervals for many models, and the fluids and spark plugs tool lists oil, coolant and plug specs so you can see whether the parts on an invoice match what the model takes.

Ask the seller to send photos of every record before the viewing. Reading a history properly takes half an hour at a table, not five minutes leaning on the seat.

Stamps, invoices and what counts as evidence

Service records come in three strengths.

• A stamp in a service book says the bike visited a workshop on a date. It usually does not say what was done, and a stamp is easy to add later.
• An itemized invoice lists the bike (by VIN or registration), the date, the odometer or hour reading, the parts and the labor. This is the strongest ordinary evidence you will get.
• Owner records - parts receipts, a notebook, dated photos - can be just as convincing when the parts match the job and the dates make sense.

Read what the invoices actually say. “Service” on its own could be an oil change or a full major service. An oil filter and oil on the receipt means an oil change; valve shims or a valve clearance line means the major work was at least checked. If the parts on the invoice do not match what your model uses, ask why.

Dates, readings and gaps

Put every record in date order in one list, then read the readings down the column. They should rise, steadily and at a pace that makes sense for how the seller says they ride. A reading that goes down is the one thing you cannot ignore: it may be a replaced instrument cluster, which should come with its own invoice, or it may be a reading that was changed.

Next, look at the gaps. Compare the time and distance between services with the intervals in the manual. A bike ridden little may cover the distance slowly, but time-based items still fall due: many manuals set brake fluid and coolant replacement by months, because brake fluid absorbs moisture over time whether the bike is ridden or not. Tires age too; the date code on the sidewall tells you how old they are.

A gap is a question, not a verdict. Storage over a winter, a period abroad, lost paperwork - each has a plausible explanation. What you want is the explanation, and ideally something that supports it.

Missing major services

Every maintenance schedule has a few expensive jobs: valve clearance checks, timing belt replacement on some engines, fork oil changes, top-end rebuilds on competition bikes. Find them in the manual and check each against the records. They are the entries sellers are most likely to skip, because they cost the most.

A missing major service does not make the bike a bad buy. It makes the job yours. Get an estimate for it, add it to the cost of the bike and let that shape your offer. If the job is overdue by a long way, have a mechanic look at the bike before you commit - an engine that has run far past a valve check can have more than a clearance problem.

Rebuilding a history, or starting without one

When records are scattered, rebuild them into one dated list: date, reading, what was done, who did it and where the proof is. Contact the workshops named on the invoices if something important is unclear; many keep records, though what they can share depends on local privacy rules.

If there is no history at all, stop trying to reconstruct it. Treat every service item as unknown, price a full baseline service into your offer, and plan to do it in your first month. The first 30 days after buying playbook walks through that reset.

By bike type

• Enduro and MX: the history should be in engine hours. Match entries to the hour meter and the manual’s hour-based schedule for oil, air filter and top-end work.
• Chain, belt or shaft: look for chain and sprocket replacements, belt inspections or final-drive oil changes at the manual’s intervals.
• Electric: fluid changes are few; the useful records are dealer software updates, battery checks and brake fluid.
• Scooters: look for CVT belt and roller replacements; they have their own interval in the manual.

When to call a mechanic

Call one when a major service is long overdue, when readings go backward without an explanation, or when invoices mention repeated repairs to the same part. Brakes and steering are safety systems: if the records show no brake fluid change within the manual’s time limit, have a qualified mechanic do it before you ride far.

Bring the history with you

Once the bike is yours, fill the rebuilt list into Garagely’s CSV template and use import history to bring it in. The import shows which rows are valid and which have errors before anything is added, so the seller’s records become the first entries in your own log.