Yamaha Yn100 (2003)
2003 Yamaha Yn100
CarHunch analysed 131 real MOT records for the 2003 Yamaha Yn100. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
The 2003 Yamaha YN100 falls slightly short of the UK average with a 76.7% first-time pass rate compared to 80%, suggesting modest reliability concerns, though the 14.5% rate of dangerous defects is manageable for a 20-year-old scooter. This is a bike that will need attention, with an average of 1.59 failures and 3.2 advisories per test indicating routine wear rather than catastrophic problems.
The median mileage of 6,855 miles is low for its age, which is typical of occasional-use scooters and actually works in your favour—these vehicles haven't been thrashed. Before buying, budget for brake and exhaust work (the most common advisory items on small scooters of this era), and have a pre-purchase inspection focus on the electrical system and suspension, which often deteriorate in storage.
What to check before buying a 2003 Yamaha Yn100
Practical pre-purchase checks for this age and model.
- 📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
- 🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
- 🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
- 📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.
Before you buy a Yamaha Yn100
MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.
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Mileage Distribution
Most 2003 Yamaha Yn100 vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 2003 Yamaha Yn100 vehicles fall between 4,300 and 10,235 miles.
2003 Yamaha Yn100 — Still on the Road
Numbers are declining — 12 vehicles still getting MOTs in 2022 (27% of peak).
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2014–2022.
MOT History Averages
Most Common MOT Issues — 2003 Yamaha Yn100
Based on actual MOT test records for this model. Percentage shows how often each item appears across all vehicles in this cohort.
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27%
Front Brake pad(s) close to minimum limit
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24.9%
Rear Tyre worn close to the legal limit
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23.7%
Front Brake pad(s) less than 1.5 mm thick
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19.5%
Front Stop lamp does not illuminate immediately a brake applies
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17.8%
Front Tyre valve stem slightly damaged
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17%
Rear Tyre tread depth is below minimum requirements of 1.0mm
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16.4%
Exhaust is leaking and excessively noisey
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16.4%
Front Brake disc(s) slightly worn
Data covers a 3-year window centred on 2003. Counts include advisories and failures.
Found a specific Yamaha Yn100?
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