TGB 303 vs Honda CG125

The TGB 303 passes its MOT first time more often than the Honda CG125: 73.3% vs 72.2%, a 1.1-point lead.

MOT reliability, side by side

first-time pass rate, outright fail rate and tests analysed · 2005–2025

Metric	TGB 303	Honda CG125
First-time pass rate	73.3%	72.2%
Outright fail rate	20.5%	16.8%
Vs comparable bikes (age & mileage adjusted)	-2.1 pts	+0.7 pts
Engine size	124cc	124cc
Rank among all models	#4471 of 5428	#4568 of 5428
Median miles at test	4,724	17,460
MOT tests analysed	307	89,345
Most common failure	brakes	lighting and signalling

First-time outcomes on normal tests, 2005–2025. "Most common failure" is the component group with the most recorded defects on failed tests. Read pass rates against test counts: a smaller sample is noisier. Source: DVSA anonymised MOT results.

"Vs comparable bikes" is the first-time pass rate minus the rate expected for each bike's own mix of age, mileage and test class, in percentage points: positive means better than comparable bikes. How this works.

Pass rate by test year

first-time MOT pass rate in each calendar year both bikes were tested

Test year	TGB 303	Honda CG125
2017	71.4%	72.7%
2018	72.7%	72.6%
2019	80.5%	71.8%
2020	78.9%	73.6%
2021	65.1%	73.9%
2022	69.4%	73.5%

Each year mixes bikes of different ages, so a fleet that is getting older tends to slip.

Pass rate by mileage

first-time MOT pass rate by miles on the clock at test

Mileage	TGB 303	Honda CG125
0k-10k miles	75.3%	79.3%
10k-20k miles	61.5%	73.0%

Bands with fewer than 30 tests for either bike are left out.

TGB 303 73.3% pass · 307 tests HONDA CG125 72.2% pass · 89.3k tests

See each bike's full report (trend, mileage curve, failure breakdown and rivals) on its own page.