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Yamaha Dt175 (1981)

142 real MOT outcomes analysed • 88% first-time pass rate

1981 Yamaha Dt175

CarHunch analysed 142 real MOT records for the 1981 Yamaha Dt175. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.

The 1981 Yamaha DT175 passes its MOT at 88%, well above the UK average of 80%, and dangerous defects are rare at just 5.6% of vehicles—a genuinely reassuring sign for a bike now over 40 years old. These older trail bikes are clearly being maintained by conscientious owners, not left to rot.

At an average mileage of 15,070, these machines are lightly used, which explains the relatively low failure rate of 0.63 per vehicle. If you're considering one, expect minor advisories (averaging 1.6 per bike, mostly wear items), but inspect the fuel system and electrics carefully, as these are the common weak points on machines this age; a pre-purchase inspection by a Yamaha-familiar mechanic is essential.

Generally reliable 8% above UK average
88%
pass MOT first time
UK average: ~80%
12,975
typical mileage
8,560–20,120 middle half
5.6%
ever had a dangerous defect
recorded at any MOT
0.63
avg MOT failures per car
over 4.6 tests on record

What to check before buying a 1981 Yamaha Dt175

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 Dt175

MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.

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Mileage Distribution

Most 1981 Yamaha Dt175 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.

8,560
low mileage
12,975
typical
20,120
high mileage

Half of all 1981 Yamaha Dt175 vehicles fall between 8,560 and 20,120 miles.

1981 Yamaha Dt175 — Still on the Road

Numbers are declining — 11 vehicles still getting MOTs in 2022 (24% of peak).

46 11 2014 2022

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

4.6
Avg MOT tests per vehicle
0.63
Avg failures per vehicle
1.6
Avg advisories per vehicle

Most Common MOT Issues — 1981 Yamaha Dt175

Based on actual MOT test records for this model. Percentage shows how often each item appears across all vehicles in this cohort.

  • 10.9%
    Rear reflector on motorcycle missing
  • 9%
    Rear position lamp does not illuminate immediately when it is switched on
  • 9%
    Headlamp at least one does not illuminate on dipped beam
  • 8.5%
    Drive chain worn but not considered excessive
  • 8.1%
    Front Wheel spoke slightly loose.
  • 8.1%
    Headlamp at least one does not illuminate on main beam
  • 7.6%
    Front Wheel has a slightly distorted bead rim.
  • 6.6%
    Rear suspension bush has slight free play

Data covers a 3-year window centred on 1981. Counts include advisories and failures.

Found a specific Yamaha Dt175?

Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.

UK

Other model years — Yamaha Dt175:

1980