BIKERELIABILITY Reg check
Registration-year report · 2005–2025

Data as of: DVSA MOT results to 2025

Derbi Terra 125: MOT pass rate by registration year

Which Terra 125 years pass first time, and which fall short of the model's 67.7% average, from 613 DVSA tests.

2008
highest-passing year · 70.8%
2011
lowest-passing year · 55.7%
15.1pp
spread across 4 years

Pass rate by registration year

first-time pass rate · cohorts with 50 or more tests · registration year from first use date

Highest pass rate: 2008 (70.8% of 192 tests). Lowest: 2011 (55.7% of 61). Years more than two points below the model average: 2011.

53%63%74%2008: 70.8% pass (192 tests)2009: 68.3% pass (180 tests)2010: 68.9% pass (148 tests)2011: 55.7% pass (61 tests)200820102011
RegisteredTestsFirst-time passvs model (67.7%)
2008 192 70.8% +3.1 pp
2009 180 68.3% +0.6 pp
2010 148 68.9% +1.2 pp
2011 61 55.7% -12.0 pp

Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years. A first-time MOT pass is a roadworthiness check, not a full mechanical inspection.

Pass rate over time

first-time pass rate by test year · 2012–2017
56%68%80%2012: 66.1% pass (56 tests)2013: 76.3% pass (80 tests)2014: 60.2% pass (88 tests)2015: 63.3% pass (79 tests)2016: 72.1% pass (61 tests)2017: 65.5% pass (58 tests)20122017

Questions

Which Terra 125 years have the lowest MOT pass rate?
2011 registered examples pass first time less often than the Derbi Terra 125 overall (67.7%); the 2011 cohort is lowest at 55.7% from 61 tests.
Which Terra 125 year has the highest MOT pass rate?
2008, at 70.8% of 192 first tests (2005–2025).
How much does the Terra 125 pass rate vary by year?
15.1 percentage points between the highest (2008, 70.8%) and lowest (2011, 55.7%) cohorts with at least 50 tests. Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years.

Full report: Derbi Terra 125 reliability, failures and mileage · ranked #4875 of 5428 models· other Derbi models: Senda, GPR50-R, GPR 50, Atlantis, Predator, Senda SM