HONDA CB100

99cc Petrol Class 1

#4436 of 5426 overall #845 of 921 HONDAs #198 of 205 naked bikes

73.6%

first-time pass rate

16.6%

failed outright

16,598

median miles at test

1,358

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2006–2022

The CB100's first-time pass rate has held steady since 2006 (76.0% → 76.9%).

Pass rate by mileage

how the CB100's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage CB100 passes first time 76.9% of the time; by 40k that's 82.5%.

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 CB100

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
lighting and signalling	289	42.2	2.5×
steering and suspension	120	17.5	2.0×
brakes	74	10.8	1.0×
tyres and wheels	62	9.1	1.6×
drive system	48	7	3.9×
lamps and reflectors	30	4.4	0.8×
body and structure	21	3.1	2.6×
fuel and exhaust	16	2.3	1.4×
driving controls	15	2.2	4.7×
structure and attachments	10	1.5	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

same type, similar capacity, high test volume

On first-time pass rate the CB100 beats 0 of its 1 closest rivals (HONDA CB125F).

HONDA CB125F 81.2% pass · 30.6k tests

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 CB100.

Pass rate by registration year

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

Best year to buy used: 1984 (82.0% pass). Weakest: 1986 (68.3%).

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 CB100 FAQ

answers computed from the data above · terms in the glossary

Is the HONDA CB100 reliable?

The HONDA CB100 is about average for its class: 73.6% of its 1,358 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #4436 of 5426 models.

What does a CB100 fail its MOT on most?

lighting and signalling — 42% of all defects recorded against failed CB100 tests.

What is the best year of CB100 to buy used?

By first-time pass rate, 1984-registered examples do best (82.0%) and 1986 worst (68.3%). Condition and history still trump the year.

How many miles will a CB100 last?

The median CB100 shows 16,598 miles at test, and examples around 40k miles still pass 82.5% of the time — mileage alone rarely kills one.