BIKERELIABILITY Reg check
Registration-year report · 2005–2025

Data as of: DVSA MOT results to 2025

Buell XB9SX: MOT pass rate by registration year

Which XB9SX years pass first time, and which fall short of the model's 82.7% average, from 1,911 DVSA tests.

2009
highest-passing year · 88.9%
2006
lowest-passing year · 76.5%
12.4pp
spread across 6 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: 2009 (88.9% of 226 tests). Lowest: 2006 (76.5% of 319). Years more than two points below the model average: 2004, 2006.

74%83%91%2004: 80.0% pass (275 tests)2005: 83.7% pass (624 tests)2006: 76.5% pass (319 tests)2007: 84.4% pass (307 tests)2008: 84.2% pass (152 tests)2009: 88.9% pass (226 tests)200420072009
RegisteredTestsFirst-time passvs model (82.7%)
2004 275 80.0% -2.7 pp
2005 624 83.7% +1.0 pp
2006 319 76.5% -6.2 pp
2007 307 84.4% +1.7 pp
2008 152 84.2% +1.5 pp
2009 226 88.9% +6.2 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 · 2008–2025
69%82%95%2008: 81.4% pass (97 tests)2009: 77.8% pass (126 tests)2010: 73.6% pass (148 tests)2011: 77.9% pass (140 tests)2012: 84.9% pass (159 tests)2013: 78.5% pass (144 tests)2014: 79.4% pass (136 tests)2015: 87.2% pass (133 tests)2016: 86.8% pass (114 tests)2017: 84.2% pass (114 tests)2018: 86.6% pass (82 tests)2019: 84.6% pass (78 tests)2020: 84.3% pass (70 tests)2021: 88.2% pass (76 tests)2022: 85.1% pass (74 tests)2023: 88.6% pass (79 tests)2024: 90.4% pass (52 tests)2025: 85.9% pass (64 tests)20082025

Questions

Which XB9SX years have the lowest MOT pass rate?
2004, 2006 registered examples pass first time less often than the Buell XB9SX overall (82.7%); the 2006 cohort is lowest at 76.5% from 319 tests.
Which XB9SX year has the highest MOT pass rate?
2009, at 88.9% of 226 first tests (2005–2025).
How much does the XB9SX pass rate vary by year?
12.4 percentage points between the highest (2009, 88.9%) and lowest (2006, 76.5%) 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: Buell XB9SX reliability, failures and mileage · ranked #3029 of 5428 models· other Buell models: XB12S, S1, M2, XB12R, XB9R, X1