Common Triumph Bonneville Speedmaster MOT failures
Based on 1,465 Triumph Bonneville Speedmaster tests on record carrying an official DVSA defect code, so every category below is counted from real failures rather than estimated.
Full Triumph Bonneville Speedmaster MOT data, pass rate and models →
Real DVSA defect codes
Every category comes from the official MOT Inspection Manual section code DVSA attaches to each defect, not guessed from keywords.
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The whole national record
Built from DVSA's published MOT data for Great Britain, not only from vehicles looked up here.
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Defaults to every make on record.
Where MOT tests find problems: Triumph Bonneville Speedmaster
A test can find problems in more than one category, so the figures above do not sum to 100%. Each percentage is the share of classifiable tests that found at least one defect in that category. Based on 1,465 classifiable tests for Triumph Bonneville Speedmaster.
What Triumph Bonneville Speedmaster failures look like
1,465 Triumph Bonneville Speedmaster tests on record carry the manual reference DVSA attaches to each defect. The most frequent problems were with brakes on 81 tests (5.5%), with axles, wheels, tyres and suspension on 59 tests (4.0%) and with lamps, reflectors and electrical equipment on 50 tests (3.4%). A test can fail on more than one thing, and an MOT can be failed on one defect while another is only advised, so these counts do not add up to the number of tests.
Narrowed down from the categories to the individual defects themselves, three come up on more than one test:
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Tyre worn close to legal limit/worn on edge
MOT inspection manual reference 5.2.3, in axles, wheels, tyres and suspension
Recorded on 59 of the 1,465 tests: 5 failures and 54 advisories or minors.
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Brake pad(s) wearing thin
MOT inspection manual reference 1.1.13, in brakes
Recorded on 45 of the 1,465 tests: 6 failures and 39 advisories or minors.
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Headlamp aim too low
MOT inspection manual reference 4.1.2, in lamps, reflectors and electrical equipment
Recorded on 42 of the 1,465 tests: one failure and 41 advisories or minors.
Where there is enough data to compare: Triumph Bonneville (154,321 tests), Triumph Tiger (147,000 tests), Triumph Sprint (60,302 tests), Triumph Speed Triple (49,320 tests), every Triumph model (929,475 tests).
Clauses are read from the manual reference at the end of every defect on the cached test records, and a defect shown here has to appear on at least two of them before it is named. The site-wide breakdown explains how that works and compares every make.