Get Started

Yamaha Dt125r Sm (2005)

107 real MOT outcomes analysed • 27.3% first-time pass rate

2005 Yamaha Dt125r Sm

CarHunch analysed 107 real MOT records for the 2005 Yamaha Dt125r Sm. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.

**Reliability verdict**

This 2005 Yamaha DT125R SM is a reliability concern: only 27.3% pass MOT first time, nearly three times worse than the UK average of 80%. The dangerous defect rate of 2.8% is mercifully low, but the weak pass rate reflects genuine mechanical issues that buyers need to factor in.

**Context and practical takeaway**

At around 12,000–14,000 miles median, these bikes are relatively lightly used for their age, yet they're still racking up 0.38 failures and 1.2 advisories per vehicle on average. This suggests the DT125R is ageing poorly even at modest mileage, likely due to corrosion, worn electrics, or neglected maintenance rather than hard riding. Budget for pre-purchase inspection by a specialist motorcycle mechanic and expect to address at least one fault before it passes MOT.

Below average reliability 52.7% below UK average
27.3%
pass MOT first time
UK average: ~80%
12,362
typical mileage
5,331–16,943 middle half
2.8%
ever had a dangerous defect
recorded at any MOT
0.38
avg MOT failures per car
over 2.3 tests on record

What to check before buying a 2005 Yamaha Dt125r Sm

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 Dt125r Sm

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

Inspection ClickMechanic Have a qualified mechanic check this car before you commit to buying →

CarHunch may earn a small commission if you buy via these links — at no extra cost to you.

Pass Rate by Fuel Type

Fuel type Vehicles Pass rate Avg failures
Petrol (91%) 97 21.4% 0.38
Other (9%) 10 85% 0.4

Mileage Distribution

Most 2005 Yamaha Dt125r Sm 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.

5,331
low mileage
12,362
typical
16,943
high mileage

Half of all 2005 Yamaha Dt125r Sm vehicles fall between 5,331 and 16,943 miles.

MOT History Averages

2.3
Avg MOT tests per vehicle
0.38
Avg failures per vehicle
1.2
Avg advisories per vehicle

Found a specific Yamaha Dt125r Sm?

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

UK