YAMAHA TRX850

849cc Petrol Class 2

#3028 of 5426 overall #178 of 409 YAMAHAs #1921 of 2787 other bikes

82.7%

first-time pass rate

9.7%

failed outright

24,049

median miles at test

8,832

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2005–2025

The TRX850's first-time pass rate has risen 4.6 points since 2005, 81.5% to 86.1%.

Pass rate by mileage

how the TRX850's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage TRX850 passes first time 82.6% of the time; by 50k that's 79.4%.

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 TRX850

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
brakes	505	29.2	1.0×
lighting and signalling	395	22.8	0.8×
steering and suspension	288	16.6	0.9×
tyres and wheels	183	10.6	0.9×
lamps and reflectors	94	5.4	0.5×
fuel and exhaust	77	4.4	1.0×
reg plates and vin	53	3.1	0.8×
drive system	47	2.7	0.6×
suspension	45	2.6	0.6×
body and structure	44	2.5	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 TRX850 beats 3 of its 4 closest rivals (KAWASAKI ZX-6R, SUZUKI GSF600, YAMAHA FZS600).

KAWASAKI ZX-6R 78.1% pass · 174k tests SUZUKI GSF600 77.3% pass · 143k tests YAMAHA FZS600 82.6% pass · 137k tests TRIUMPH SPRINT 85.6% pass · 133k 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 TRX850.

Pass rate by registration year

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

Best year to buy used: 2000 (87.1% pass). Weakest: 1995 (74.0%).

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.

YAMAHA TRX850 FAQ

answers computed from the data above · terms in the glossary

Is the YAMAHA TRX850 reliable?

The YAMAHA TRX850 is less reliable than average for its class: 82.7% of its 8,832 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #3028 of 5426 models.

What does a TRX850 fail its MOT on most?

brakes — 29% of all defects recorded against failed TRX850 tests.

What is the best year of TRX850 to buy used?

By first-time pass rate, 2000-registered examples do best (87.1%) and 1995 worst (74.0%). Condition and history still trump the year.

How many miles will a TRX850 last?

The median TRX850 shows 24,049 miles at test, and examples around 50k miles still pass 79.4% of the time — mileage alone rarely kills one.