Pass rate over time
The GL1800's first-time pass rate has risen 1.4 points since 2006, 90.4% to 91.8%.
Pass rate by mileage
A low-mileage GL1800 passes first time 94.5% of the time; by 50k that's 92.4%.
First-time pass rate by odometer reading at test, 10,000-mile bands for this model. Mileage is the strongest reliability signal. See the full curve.
What fails on a GL1800
| Component group | Share of defects | Defects | % of defects | vs all bikes |
|---|---|---|---|---|
| brakes |
|
43 | 22.3 | 0.4× |
| steering and suspension |
|
39 | 20.2 | 0.5× |
| tyres and wheels |
|
35 | 18.1 | 0.6× |
| lighting and signalling |
|
30 | 15.5 | 0.3× |
| tyres |
|
14 | 7.3 | 0.5× |
| lamps and reflectors |
|
9 | 4.7 | 0.2× |
| suspension |
|
9 | 4.7 | 0.4× |
| reg plates and vin |
|
5 | 2.6 | 0.3× |
| steering |
|
5 | 2.6 | 0.6× |
| driving controls |
|
4 | 2.1 | 0.8× |
Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects. "vs all bikes" is how often this model's tests record a defect in the group, as a multiple of the all-bike rate.
How rivals compare
On first-time pass rate the GL1800 beats 4 of its 4 closest rivals (SUZUKI GSX1400, SUZUKI GSX1300R, HONDA ST1300).
Rivals share this bike's type and sit within ±30% of its engine capacity, ≥ 5,000 tests. Card colour = better/worse first-time pass rate than the GL1800.
Pass rate by registration year
Best year to buy used: 2008 (95.9% pass). Weakest: 2005 (86.8%).
First-time pass rate by the year each bike was first registered (cohorts with ≥ 50 tests). Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years.
HONDA GL1800 FAQ
Is the HONDA GL1800 reliable?
The HONDA GL1800 is more reliable than average for its class: 92.2% of its 2,136 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #433 of 5426 models.
What does a GL1800 fail its MOT on most?
brakes — 22% of all defects recorded against failed GL1800 tests.
What is the best year of GL1800 to buy used?
By first-time pass rate, 2008-registered examples do best (95.9%) and 2005 worst (86.8%). Condition and history still trump the year.
How many miles will a GL1800 last?
The median GL1800 shows 27,870 miles at test, and examples around 50k miles still pass 92.4% of the time — mileage alone rarely kills one.