MOTO GUZZI 850 T4
Pass rate over time
The 850 T4's first-time pass rate has risen 1.5 points since 2006, 86.0% to 87.5%.
Pass rate by mileage
A low-mileage 850 T4 passes first time 86.5% of the time; by 50k that's 78.3%.
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 850 T4
| Component group | Share of defects | Defects | % of defects |
|---|---|---|---|
| lighting and signalling |
|
28 | 40.6 |
| brakes |
|
17 | 24.6 |
| tyres and wheels |
|
10 | 14.5 |
| steering and suspension |
|
5 | 7.2 |
| body and structure |
|
3 | 4.3 |
| tyres |
|
2 | 2.9 |
| lamps and reflectors |
|
1 | 1.4 |
| fuel and exhaust |
|
1 | 1.4 |
| suspension |
|
1 | 1.4 |
| driving controls |
|
1 | 1.4 |
Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects.
How rivals compare
On first-time pass rate the 850 T4 beats 4 of its 4 closest rivals (KAWASAKI ZX-6R, SUZUKI GSF600, YAMAHA FZS600).
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 850 T4.
Pass rate by registration year
Best year to buy used: 1981 (87.1% pass). Weakest: 1981 (87.1%).
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.