BIKERELIABILITY Reg check
League table/ SUZUKI/GT380
Model report · 2005–2025

Data as of: DVSA MOT results to 2025

SUZUKI GT380

371cc Petrol Class 2
#1370 of 5428 overall #153 of 680 SUZUKIs #840 of 2788 other bikes
88.7%
first-time pass rate
4.6%
failed outright
20,202
median miles at test
2,155
MOT tests, 2005–2025
+4.9pp
vs expected · age & mileage

The pass rate is the MOT first-time pass: a roadworthiness check of the items an MOT covers (brakes, lights, tyres, steering, structure, emissions), not a full mechanical inspection of engine or gearbox internals. It is a reliability signal, not a complete measure of mechanical reliability. What this measures.

“vs expected” adjusts for age, mileage and test class, so a cherished classic and a hard-used commuter are compared fairly. How this works.

Pass rate over time

first-time pass rate by test year · 2006–2019

The GT380's first-time pass rate has risen 3.5 points since 2006, 87.9% to 91.4%.

84%89%94%2006: 87.9% pass (141 tests)2007: 89.3% pass (131 tests)2008: 89.6% pass (134 tests)2009: 85.4% pass (158 tests)2010: 87.9% pass (149 tests)2011: 90.1% pass (161 tests)2012: 88.7% pass (168 tests)2013: 88.4% pass (181 tests)2014: 85.6% pass (194 tests)2015: 87.3% pass (189 tests)2016: 91.7% pass (180 tests)2017: 92.6% pass (175 tests)2018: 87.9% pass (66 tests)2019: 91.4% pass (35 tests)20062019

Pass rate by mileage

how the GT380's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage GT380 passes first time 88.8% of the time; by 50k that's 91.9%.

85%89%93%0k: 88.8% pass (427 tests)10k: 89.0% pass (634 tests)20k: 88.8% pass (658 tests)30k: 86.4% pass (287 tests)40k: 91.3% pass (103 tests)50k: 91.9% pass (37 tests)0k30k50k

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 GT380

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects vs all bikes
steering and suspension
68 30.2 0.7×
lighting and signalling
50 22.2 0.4×
brakes
36 16 0.3×
tyres and wheels
29 12.9 0.5×
fuel and exhaust
13 5.8 0.6×
drive system
12 5.3 0.6×
body and structure
8 3.6 0.6×
lamps and reflectors
6 2.7 0.1×
reg plates and vin
2 0.9 0.2×
structure and attachments
1 0.4 0.1×

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

same type, similar capacity, high test volume

On first-time pass rate the GT380 beats 4 of its 4 closest rivals (SUZUKI AN400, SUZUKI DR-Z400S, YAMAHA RD350).

SUZUKI AN400 86.2% pass · 27.1k tests Compare head-to-head →
SUZUKI DR-Z400S 80.4% pass · 26.8k tests Compare head-to-head →
YAMAHA RD350 86.3% pass · 19.6k tests Compare head-to-head →
KAWASAKI ZXR400 73.1% pass · 14.2k tests Compare head-to-head →

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 GT380.

Compare with any bike

rival not listed above? pick any model to see it head-to-head with the GT380

More SUZUKI models

other SUZUKI bikes ranked by MOT pass rate
SUZUKI GSXR600 76.7% pass · 149k tests
SUZUKI GSF600 77.3% pass · 143k tests
SUZUKI GSXR750 79.8% pass · 99.2k tests
SUZUKI GSF1200 82.4% pass · 97.6k tests
SUZUKI GSXR1000 83.8% pass · 97.5k tests
SUZUKI SV650S 80.6% pass · 84.6k tests

See all SUZUKI models →

Pass rate by registration year

how each model-year cohort fares · registration year from first use date

Highest pass rate: 1977 (92.0%). Lowest: 1971 (79.3%). Every GT380 year compared →

77%86%95%1971: 79.3% pass (121 tests)1972: 87.6% pass (105 tests)1974: 89.7% pass (165 tests)1975: 90.8% pass (251 tests)1976: 88.4% pass (639 tests)1977: 92.0% pass (324 tests)1978: 89.1% pass (256 tests)1979: 89.8% pass (186 tests)197119761979

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.

SUZUKI GT380 FAQ

answers computed from the data above · terms in the glossary

Is the SUZUKI GT380 reliable?

The SUZUKI GT380 is more reliable than average for its class: 88.7% of its 2,155 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #1370 of 5428 models.

What does a GT380 fail its MOT on most?

steering and suspension: 30% of all defects recorded against failed GT380 tests.

What is the best year of GT380 to buy used?

By first-time pass rate, 1977-registered examples do best (92.0%) and 1971 worst (79.3%). Condition and history still trump the year.

How many miles will a GT380 last?

The median GT380 shows 20,202 miles at test, and examples around 50k miles still pass 91.9% of the time, so mileage alone rarely decides the result.

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