BIKERELIABILITY
MOT DATA · GREAT BRITAIN · 2005–2025
League table/ HONDA/SH 300 A-8
Model report · 2005–2025

HONDA SH 300 A-8

279cc Petrol Class 2
86.8%
first-time pass rate
7.4%
failed outright
12,447
median miles at test
1,719
MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2011–2025

The SH 300 A-8's first-time pass rate has fallen 10.4 points since 2011, 91.5% to 81.1%.

78%86%94%2011: 91.5% pass (82 tests)2012: 87.3% pass (158 tests)2013: 85.8% pass (176 tests)2014: 84.9% pass (179 tests)2015: 88.3% pass (163 tests)2016: 86.4% pass (162 tests)2017: 86.8% pass (144 tests)2018: 84.1% pass (107 tests)2019: 81.9% pass (94 tests)2020: 86.9% pass (84 tests)2021: 91.8% pass (98 tests)2022: 87.9% pass (91 tests)2023: 89.3% pass (75 tests)2024: 88.7% pass (53 tests)2025: 81.1% pass (53 tests)20112025

Pass rate by mileage

how the SH 300 A-8's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage SH 300 A-8 passes first time 92.6% of the time; by 40k that's 87.5%.

76%86%95%0k: 92.6% pass (692 tests)10k: 83.5% pass (538 tests)20k: 82.5% pass (286 tests)30k: 78.6% pass (98 tests)40k: 87.5% pass (40 tests)0k20k40k

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 SH 300 A-8

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects vs all bikes
brakes
65 34.6 0.7×
lighting and signalling
36 19.1 0.4×
tyres and wheels
32 17 0.8×
lamps and reflectors
17 9 0.6×
steering and suspension
14 7.4 0.3×
tyres
12 6.4 0.9×
suspension
7 3.7 0.4×
body and structure
2 1.1 0.2×
reg plates and vin
2 1.1 0.2×
wheels
1 0.5 1.0×

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 SH 300 A-8 beats 4 of its 4 closest rivals (YAMAHA RD350, YAMAHA YP250, YAMAHA WR250F).

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 SH 300 A-8.

Pass rate by registration year

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

Best year to buy used: 2010 (89.9% pass). Weakest: 2008 (86.4%).

86%88%91%2008: 86.4% pass (706 tests)2009: 86.5% pass (861 tests)2010: 89.9% pass (148 tests)200820092010

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 SH 300 A-8 FAQ

answers computed from the data above · terms in the glossary

Is the HONDA SH 300 A-8 reliable?

The HONDA SH 300 A-8 is about average for its class: 86.8% of its 1,719 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #1962 of 5426 models.

What does a SH 300 A-8 fail its MOT on most?

brakes — 35% of all defects recorded against failed SH 300 A-8 tests.

What is the best year of SH 300 A-8 to buy used?

By first-time pass rate, 2010-registered examples do best (89.9%) and 2008 worst (86.4%). Condition and history still trump the year.

How many miles will a SH 300 A-8 last?

The median SH 300 A-8 shows 12,447 miles at test, and examples around 40k miles still pass 87.5% of the time — mileage alone rarely kills one.