BIKERELIABILITY
MOT DATA · GREAT BRITAIN · 2005–2025
Model report · 2005–2025

NORTON 88

500cc Petrol Class 2
#381 of 5426 overall #16 of 34 NORTONs #237 of 2787 other bikes
92.5%
first-time pass rate
2.2%
failed outright
8,555
median miles at test
359
MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2006–2012

The 88's first-time pass rate has risen 6.2 points since 2006, 93.8% to 100.0%.

86%93%100%2006: 93.8% pass (48 tests)2007: 93.3% pass (45 tests)2008: 88.6% pass (44 tests)2009: 91.4% pass (35 tests)2010: 91.4% pass (35 tests)2011: 90.9% pass (33 tests)2012: 100.0% pass (31 tests)20062012

Pass rate by mileage

how the 88's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage 88 passes first time 93.0% of the time; by 40k that's 90.0%.

82%91%100%0k: 93.0% pass (185 tests)10k: 97.8% pass (46 tests)30k: 84.8% pass (33 tests)40k: 90.0% pass (30 tests)0k30k40k

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 88

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects
lighting and signalling
11 52.4
steering and suspension
5 23.8
brakes
3 14.3
fuel and exhaust
1 4.8
tyres and wheels
1 4.8

Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects.

How rivals compare

same type, similar capacity, high test volume

On first-time pass rate the 88 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 88.

Pass rate by registration year

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

Best year to buy used: 1955 (89.5% pass). Weakest: 1955 (89.5%).

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.