TGB 304

124cc Petrol Class 1

#4715 of 5426 overall #10 of 13 TGBs #372 of 734 commuter bikes

70.2%

first-time pass rate

20.0%

failed outright

11,781

median miles at test

1,243

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2006–2017

The 304's first-time pass rate has fallen 10.6 points since 2006, 79.5% to 68.9%.

Pass rate by mileage

how the 304's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage 304 passes first time 75.0% of the time; by 20k that's 65.7%.

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 304

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
steering and suspension	150	26.9	2.7×
lighting and signalling	131	23.5	1.7×
brakes	128	23	1.8×
tyres and wheels	63	11.3	2.5×
fuel and exhaust	29	5.2	2.8×
lamps and reflectors	18	3.2	0.6×
body and structure	12	2.2	1.8×
tyres	10	1.8	0.9×
suspension	10	1.8	1.0×
structure and attachments	6	1.1	0.7×

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 304 beats 0 of its 4 closest rivals (YAMAHA YBR 125, HONDA CG125, HONDA CBF125).

YAMAHA YBR 125 71.0% pass · 125k tests HONDA CG125 72.2% pass · 89.3k tests HONDA CBF125 73.3% pass · 84.4k tests GILERA RUNNER 70.8% pass · 69.9k 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 304.

Pass rate by registration year

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

Best year to buy used: 2009 (73.5% pass). Weakest: 2004 (68.4%).

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.

TGB 304 FAQ

answers computed from the data above · terms in the glossary

Is the TGB 304 reliable?

The TGB 304 is less reliable than average for its class: 70.2% of its 1,243 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #4715 of 5426 models.

What does a 304 fail its MOT on most?

steering and suspension — 27% of all defects recorded against failed 304 tests.

What is the best year of 304 to buy used?

By first-time pass rate, 2009-registered examples do best (73.5%) and 2004 worst (68.4%). Condition and history still trump the year.

How many miles will a 304 last?

The median 304 shows 11,781 miles at test, and examples around 20k miles still pass 65.7% of the time — mileage alone rarely kills one.