BIKERELIABILITY Reg check
League table/ VELOCETTE/VIPER
Model report · 2005–2025

VELOCETTE VIPER

350cc Petrol Class 2
#198 of 5428 overall #6 of 13 VELOCETTEs #119 of 2788 other bikes
93.8%
first-time pass rate
1.7%
failed outright
15,114
median miles at test
1,970
MOT tests, 2005–2025

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.

Pass rate over time

first-time pass rate by test year · 2005–2018

The VIPER's first-time pass rate has risen 2.5 points since 2005, 97.5% to 100.0%.

89%95%100%2005: 97.5% pass (40 tests)2006: 92.1% pass (189 tests)2007: 93.9% pass (163 tests)2008: 91.3% pass (173 tests)2009: 95.9% pass (170 tests)2010: 91.5% pass (189 tests)2011: 92.7% pass (177 tests)2012: 92.3% pass (183 tests)2013: 93.6% pass (141 tests)2014: 95.3% pass (129 tests)2015: 94.8% pass (135 tests)2016: 96.7% pass (120 tests)2017: 95.3% pass (106 tests)2018: 100.0% pass (35 tests)20052018

Pass rate by mileage

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

A low-mileage VIPER passes first time 93.4% of the time; by 50k that's 94.5%.

92%95%98%0k: 93.4% pass (769 tests)10k: 92.6% pass (339 tests)20k: 92.9% pass (211 tests)30k: 97.0% pass (198 tests)40k: 92.5% pass (239 tests)50k: 94.5% pass (110 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 VIPER

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects vs all bikes
lighting and signalling
20 41.7 0.2×
brakes
13 27.1 0.1×
tyres and wheels
6 12.5 0.2×
steering and suspension
5 10.4 0.1×
drive system
2 4.2 0.1×
driving controls
1 2.1 0.2×
body and structure
1 2.1 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 VIPER 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 VIPER.

Compare with any bike

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

More VELOCETTE models

other VELOCETTE bikes ranked by MOT pass rate
VELOCETTE VENOM 94.4% pass · 5,005 tests
VELOCETTE LE 92.2% pass · 1,968 tests
VELOCETTE MAC 92.5% pass · 1,489 tests
VELOCETTE MSS 95.2% pass · 1,232 tests
VELOCETTE THRUXTON 95.3% pass · 570 tests
VELOCETTE KSS 92.3% pass · 559 tests

See all VELOCETTE models →

Pass rate by registration year

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

Best year to buy used: 1962 (98.8% pass). Weakest: 1957 (92.3%).

91%96%100%1956: 98.0% pass (51 tests)1957: 92.3% pass (65 tests)1958: 93.1% pass (131 tests)1959: 92.4% pass (158 tests)1960: 93.2% pass (469 tests)1961: 94.1% pass (337 tests)1962: 98.8% pass (254 tests)1963: 93.0% pass (199 tests)1965: 93.5% pass (124 tests)195619601965

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.

VELOCETTE VIPER FAQ

answers computed from the data above · terms in the glossary

Is the VELOCETTE VIPER reliable?

The VELOCETTE VIPER is more reliable than average for its class: 93.8% of its 1,970 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #198 of 5428 models.

What does a VIPER fail its MOT on most?

lighting and signalling — 42% of all defects recorded against failed VIPER tests.

What is the best year of VIPER to buy used?

By first-time pass rate, 1962-registered examples do best (98.8%) and 1957 worst (92.3%). Condition and history still trump the year.

How many miles will a VIPER last?

The median VIPER shows 15,114 miles at test, and examples around 50k miles still pass 94.5% of the time — mileage alone rarely kills one.

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