How to value your motorcycle: the method

Valuing a motorcycle is not intuition, it is a calculation followed by a verification. The method has two stages: a theoretical model that gives you an order of magnitude, then a cross-check against real listings that corrects what the model ignores. Skipping the second stage is the most common mistake.

The starting point: the price when new

Every valuation starts from the price of the bike new in the year it was first registered, including options if they were invoiced from the factory.

That figure can be found in period manufacturer price lists, road tests from the year concerned, or dealer archives. Take the on-the-road price, not the headline figure: that is what was actually paid.

Depreciation by age

A motorcycle's depreciation is not linear. It is brutal at the start, then stabilises, then on certain machines it can reverse.

Rough figures observed on the UK and wider European market for an ordinary bike in good condition with average mileage:

Two important nuances:

• The floor is real. A mechanically sound bike, in running order, with correct paperwork, almost never drops below a certain threshold whatever its age. That floor depends mainly on capacity and on the model's reputation for reliability.
• The rebound concerns a minority of machines: limited production runs, bikes that have become cult objects, engines dropped from the catalogue because of emissions rules. On those machines the depreciation model no longer applies and only real listings count.

The mileage coefficient

Mileage corrects the theoretical value produced by age. The common reference in the UK sits around 2,500 to 4,000 miles a year for leisure use, more for daily commuting or a tourer.

Work out the gap between actual mileage and the mileage expected for the age, then apply:

• Mileage far below expectation (less than 50%): +5 to +12%
• Mileage below expectation (50 to 80%): +3 to +6%
• Mileage in line (80 to 120%): neutral
• Mileage above (120 to 160%): −5 to −12%
• Mileage far above (beyond 160%): −12 to −25%

Watch for two threshold effects:

• Psychological barriers (20,000, 30,000, 50,000 miles) cause disproportionate breaks in price. Going from 29,000 to 31,000 miles costs more in perceived value than the actual mileage justifies.
• Very low mileage is not always an asset. A ten-year-old bike showing 2,500 miles is worrying: dried seals, perished hoses, gummed carburettors or injectors, a tired battery. The bonus disappears if servicing has followed the odometer rather than the calendar.

The condition coefficient

Condition is the most subjective factor, and the one where sellers most often err in their own favour. Be harsh.

A useful principle: the market deducts the cost of upcoming work, with a premium on top. A chain and sprocket kit costing £270 in parts and labour translates into £300 to £400 of negotiation, because the buyer prices in their own risk and their own effort.

The make and model coefficient

With identical specifications, two motorcycles do not depreciate the same way.

• Makes with strong residual value: mainstream Japanese manufacturers with a reputation for reliability, and a few European marques with dense dealer networks. Slower depreciation, quick resale.
• Makes with accelerated depreciation: machines with thin dealer coverage, high servicing costs or parts that are hard to source. Depreciation can run 10 to 15 percentage points steeper than a direct rival.
• Segment effect: versatile mid-capacity adventure bikes and roadsters resell quickly and well. Big tourers, large-capacity cruisers and extreme sportsbikes suffer faster depreciation and longer selling times.
• A2 effect: a machine that can be restricted to A2, complete with the kit and the certificate, reaches a much wider audience. That shows up as a shorter selling time and weaker negotiation.

The effect of documented servicing

This is the parameter sellers underestimate most, and the one informed buyers look at hardest.

A bike identical to another, but accompanied by a stamped service book or a coherent set of invoices, routinely sells for 5 to 10% more and sells faster. On models with heavy scheduled work — valve clearances, belts, clutch — the invoice proving the job has been done can be worth several hundred pounds on its own, because it removes a quantifiable uncertainty.

Conversely, a total absence of history on a bike over five years old costs 5 to 15% even if the machine is sound: the buyer cannot verify, so they make provision.

The UK adds a useful free source here. The MOT history on gov.uk lists every test, every advisory and the recorded mileage at each one. A buyer will look at it, so you should too: a coherent mileage progression is an argument in your favour, and an anomaly is far better explained by you than discovered by them.

The full calculation

New price × age-related residual value × (1 + mileage coefficient) × (1 + condition coefficient) × (1 + brand/servicing coefficient).

Example for a mid-capacity roadster sold at £7,500 new in 2020, showing 24,000 miles in 2026:

• Base at 6 years: about 45% residual value → £3,375
• Expected mileage ≈ 19,000 miles, actual 24,000, i.e. 126% → −7% → £3,139
• Good condition, complete documented history → +6% → £3,327

Working range: £3,000 to £3,500, to be refined against the listings.

To avoid running that calculation by hand, a free two-minute valuation at /cote-moto applies these coefficients automatically from the model, year, mileage and stated condition.

The verification: cross-check against real listings

The model gives an order of magnitude. The market gives the price. The check is compulsory.

Method:

1. Collect 20 to 30 listings for the same model and generation, across at least two platforms.
2. Note for each one: year, mileage, stated condition, price, and how long the listing has been live.
3. Discard the high and low outliers.
4. Compare the median with your calculation. A gap of more than 15% points to an error in one coefficient — most often the condition coefficient, overrated by the seller.
5. Take off 5 to 10% to get the probable transaction price, as distinct from the asking price.

One valuable clue: a listing that has been live for more than six weeks without a price cut is a price the market has rejected, not a reference. Do not anchor your price to it.

In summary

• Depreciation follows a steep curve at first (20 to 25% in the first year) then flattens towards a floor tied to capacity and reliability.
• Mileage is measured as a gap from expected mileage (2,500 to 4,000 miles a year), with price breaks at psychological barriers.
• Condition is the coefficient sellers judge worst; the market deducts the cost of upcoming work, with a premium.
• A documented service history is routinely worth 5 to 10% on price and a shorter selling time.
• The calculation gives an order of magnitude; only the cross-check against 20 to 30 real listings, adjusted by 5 to 10% for negotiation, gives the transaction price.