Data as of: DVSA MOT results to 2025
Harley-Davidson Fat Boy: MOT pass rate by registration year
Which Fat Boy years pass first time, and which fall short of the model's 88.9% average, from 4,331 DVSA tests.
Pass rate by registration year
Highest pass rate: 2010 (93.1% of 130 tests). Lowest: 2008 (78.9% of 57). Years more than two points below the model average: 2000, 2001, 2008, 2009, 2011.
| Registered | Tests | First-time pass | vs model (88.9%) |
|---|---|---|---|
| 1971 | 94 | 89.4% | +0.5 pp |
| 1990 | 144 | 88.9% | +0.0 pp |
| 1991 | 148 | 89.2% | +0.3 pp |
| 1992 | 337 | 89.9% | +1.0 pp |
| 1993 | 275 | 88.0% | -0.9 pp |
| 1994 | 183 | 92.3% | +3.4 pp |
| 1995 | 318 | 90.9% | +2.0 pp |
| 1996 | 445 | 88.1% | -0.8 pp |
| 1997 | 334 | 88.3% | -0.6 pp |
| 1998 | 158 | 89.2% | +0.3 pp |
| 1999 | 97 | 91.8% | +2.9 pp |
| 2000 | 208 | 86.5% | -2.4 pp |
| 2001 | 149 | 83.2% | -5.7 pp |
| 2002 | 94 | 88.3% | -0.6 pp |
| 2003 | 96 | 92.7% | +3.8 pp |
| 2004 | 88 | 88.6% | -0.3 pp |
| 2005 | 87 | 92.0% | +3.1 pp |
| 2006 | 90 | 87.8% | -1.1 pp |
| 2007 | 56 | 87.5% | -1.4 pp |
| 2008 | 57 | 78.9% | -10.0 pp |
| 2009 | 99 | 82.8% | -6.1 pp |
| 2010 | 130 | 93.1% | +4.2 pp |
| 2011 | 119 | 80.7% | -8.2 pp |
| 2012 | 54 | 90.7% | +1.8 pp |
| 2013 | 94 | 92.6% | +3.7 pp |
| 2014 | 196 | 91.3% | +2.4 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
Questions
- Which Fat Boy years have the lowest MOT pass rate?
- 2000, 2001, 2008, 2009, 2011 registered examples pass first time less often than the Harley-Davidson Fat Boy overall (88.9%); the 2008 cohort is lowest at 78.9% from 57 tests.
- Which Fat Boy year has the highest MOT pass rate?
- 2010, at 93.1% of 130 first tests (2005–2025). Years more than two points above the model average: 1994, 1999, 2003, 2005, 2010, 2013, 2014.
- How much does the Fat Boy pass rate vary by year?
- 14.2 percentage points between the highest (2010, 93.1%) and lowest (2008, 78.9%) 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: Harley-Davidson Fat Boy reliability, failures and mileage · ranked #1305 of 5428 models· other Harley-Davidson models: XLH 883, Flstf, Flstc, XL, XL1200C, XL883