BIKERELIABILITY Reg check
Registration-year report · 2005–2025

Data as of: DVSA MOT results to 2025

Honda ST50-K: MOT pass rate by registration year

Which ST50-K years pass first time, and which fall short of the model's 91.4% average, from 607 DVSA tests.

1994
highest-passing year · 98.5%
1992
lowest-passing year · 81.2%
17.3pp
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: 1994 (98.5% of 137 tests). Lowest: 1992 (81.2% of 165). Years more than two points below the model average: 1992.

78%89%100%1990: 90.5% pass (63 tests)1992: 81.2% pass (165 tests)1993: 95.4% pass (152 tests)1994: 98.5% pass (137 tests)199019931994
RegisteredTestsFirst-time passvs model (91.4%)
1990 63 90.5% -0.9 pp
1992 165 81.2% -10.2 pp
1993 152 95.4% +4.0 pp
1994 137 98.5% +7.1 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 · 2006–2017
80%89%98%2006: 92.5% pass (40 tests)2007: 90.9% pass (33 tests)2008: 83.0% pass (47 tests)2009: 92.1% pass (38 tests)2010: 95.2% pass (42 tests)2011: 93.2% pass (44 tests)2012: 87.5% pass (40 tests)2013: 89.2% pass (37 tests)2014: 89.2% pass (37 tests)2015: 90.5% pass (42 tests)2017: 93.5% pass (31 tests)20062017

Questions

Which ST50-K years have the lowest MOT pass rate?
1992 registered examples pass first time less often than the Honda ST50-K overall (91.4%); the 1992 cohort is lowest at 81.2% from 165 tests.
Which ST50-K year has the highest MOT pass rate?
1994, at 98.5% of 137 first tests (2005–2025). Years more than two points above the model average: 1993, 1994.
How much does the ST50-K pass rate vary by year?
17.3 percentage points between the highest (1994, 98.5%) and lowest (1992, 81.2%) 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: Honda ST50-K reliability, failures and mileage · ranked #588 of 5428 models· other Honda models: CBR600F, CBR900RR, CBR1100XX, CB500, C90, VFR800 Fi