MOT History from tests of petrol YAMAHA YN50s year 2004

Review the list of common YAMAHA YN50 failures below or to perform a specific mot history check on your YAMAHA then use our popular KnowYourCar service

mot history

Pass percent:68.84%

(The average a petrol YAMAHA YN50 year 2004 passes without issue)

Based on:1,537 MOT Tests

Most common failures	No# failures
Headlamp aim out of alignment	95
Stop lamp does not illuminate immediately a brake applies \|1.3.1a\|	41
Exhaust is leaking and excessively noisey \|7.1.1b\|	35
Front Stop lamp does not illuminate immediately a brake applies \|1.3.1a\|	33
Headlamp insecure \|1.2.3b\|	31
Rear Brake lever has inadequate reserve travel \|3.1.3b\|	29
Headlamp at least one does not illuminate on dipped beam \|1.2.2a\|i\|\|	29
Rear reflector on motorcycle missing \|1.4.1\|	22
Rear Stop lamp does not illuminate immediately a brake applies \|1.3.1a\|	20
Registration plate issues	20
Rear position lamp does not illuminate immediately when it is switched on \|1.1.3a\|	18
Front wheel bearings have excessive free play \|2.3.5b\|	15
Nearside Rear Direction indicator not working \|1.5.1c\|	12
Rear reflector on motorcycle obscured \|1.4.1\|	10
Front wheel bearings are excessively rough \|2.3.5b\|	10
Roller brake test The less effective brake control does not achieve an efficiency of 25%. \|3.3.A2b\|	9
Stop lamp remains on when the brake is released \|1.3.1e\|	8
Steering headbearing has excessive free play \|2.2.2\|	8
Nearside Front shock absorber seal failed and leaking oil \|2.3.3\|	8
Headlamp at least one does not illuminate on main beam \|1.2.2a\|ii\|\|	8
Exhaust excessively deteriorated \|7.1.1a\|	7
Rear Brake lever insecure \|3.1.2a\|	7
Nearside Front Direction indicator not working \|1.5.1c\|	7
Offside Rear Direction indicator not working \|1.5.1c\|	7
Front position lamp does not illuminate immediately when switched on \|1.1.3a\|	7
Steering movement excessively `notchy` with the wheel raised \|2.2.1b\|	6
Wheel alignment incorrect which adversely affects the steering \|2.5.1\|	6
Headlamp aim not tested \|1.6\|	6
Front Brake disc\|s\| excessively worn \|3.2.A1l\|	6
Horn not working \|1.7.3a\|	5
Offside Front Direction indicators not working \|1.5.1c\|	5
Offside Front Direction indicator not working \|1.5.1c\|	5
Fairings insecure and likely to impede the steering \|2.1.2e\|	5
Front Exhaust is leaking and excessively noisey \|7.1.1b\|	5
Exhaust mounting does not fully support the exhaust system \|7.1.1.c\|	5
Front suspension assembly component excessively misaligned \|2.3.1\|	5
Nearside Indicator tell tale not functioning \|1.5.2\|	5
Riders seat insecure \|6.2.1a\|	5
Fuel system component leaking \|7.2.1a\|	4
Rear Rear position lamp does not illuminate immediately when it is switched on \|1.1.3a\|	4
Front Brake disc\|s\| friction surface contaminated by oil or grease \|3.2.A1k\|	4
Wheel alignment incorrect which adversely affects the handling \|2.5.1\|	4
Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking \|6.1.1c\|	4
Front Fairings insecure and likely to impede the steering \|2.1.2e\|	4
Direction indicators not working \|1.5.1c\|	4
Handlebar deformed \|2.1.1b\|	4
Headlamp main beam affected by the operation of another lamp \|1.2.2c\|	4
Rear reflector on motorcycle obscured \|1.4.2b\|	4
Front Headlamp at least one does not illuminate on dipped beam \|1.2.2a\|i\|\|	4
Rear Roller brake test indicates a binding brake \|3.3.A1a\|	3
Rear shock absorber has inadequate damping effect. \|2.4.A.3b\|	3
Exhaust noise is clearly in excess of that emitted by a similar motor bicycle fitted with a standard silencer in average condition \|7.1.2\|	3
Rear Rear reflector on motorcycle obscured \|1.4.1\|	3
Rear Roller brake test indicates a sticking brake \|3.3.A1a\|	3
Rear Stop lamp remains on when the brake is released \|1.3.1e\|	3
Nearside Rear Direction indicators not working \|1.5.1c\|	3
An item not tested \|Manual\|	3
Direction indicators affected by the operation of another lamp \|1.5.1c\|	3
Throttle operating incorrectly \|6.2.1f\|	3
Fuel hose leaking \|7.2.1a\|	3
Nearside Brake lever has inadequate reserve travel \|3.1.3b\|	3
Nearside Front Direction indicators not working \|1.5.1c\|	3
Nearside Handlebar handgrip not secure to handlebars. \|2.1.1c\|	3
Front shock absorber seal failed and leaking oil \|2.3.3\|	3
Brake lever has inadequate reserve travel \|3.1.3b\|	3
Rear Brake lever mounting insecure \|3.1.2a\|	3
Horn not loud enough to be heard by another road user \|1.7.3a\|	3
Steering movement excessively `notchy` with the weight on the lower bearing \|2.2.1a\|	3
Direction indicators flashing more than 120 times per minute \|1.5.1c\|	3
Front Roller brake test indicates excessive fluctuation of brake effort \|3.3.A1d\|	3
Horn control defective \|1.7.2a\|	2
Front Brake disc\|s\| has excessive run out \|3.2.A1m\|	2
Front Brake lever has inadequate reserve travel \|3.1.3b\|	2
Rear wheel bearings have excessive free play \|2.4.A.2c\|	2
Steering movement excessively stiff with the wheel raised \|2.2.1b\|	2
Offside Rear Exhaust is leaking and excessively noisey \|7.1.1b\|	2
Nearside Front Front shock absorber seal failed and leaking oil \|2.3.3\|	2
Offside Front Front shock absorber seal failed and leaking oil \|2.3.3\|	2
Headlamp aim headlamp deteriorated and function impaired \|1.2.3a\|	2
Front Motorcycle structure excessively damaged \|6.1.1a\|	2
Nearside Direction indicator flashing less than 60 times a minute \|1.5.1c\|	2
Rear wheel rotation likely to be impeded \|6.2.1b\|	2
Nearside Front Shock absorber has a serious fluid leak \|5.3.2 \|b\|\|	2
Offside Front Headlamp at least one does not illuminate on dipped beam \|1.2.2a\|i\|\|	2
Rear position lamp insecure \|1.1.1c\|	2
Front Stop lamp remains on when the brake is released \|1.3.1e\|	2
Rear Rear position lamp insecure \|1.1.1c\|	2
Offside Rear Direction indicators not working \|1.5.1c\|	2
Front Brake lever insecure \|3.1.2a\|	2
Rear Brake lever attachment screws loose \|3.1.2b\|	2
Rear Brake lever cannot be released smoothly \|3.1.3d\|	2
Front position lamp insecure \|1.1.1c\|	2
Headlamp dipped beam affected by the operation of another lamp \|1.2.2c\|	2
Nearside Front position lamp does not illuminate immediately when switched on \|1.1.3a\|	2
Front position lamp adversely affected by the operation of another lamp \|1.1.3b\|	2
Direction indicator flashing less than 60 times a minute \|1.5.1c\|	2
Exhaust has part of the system missing \|7.1.1a\|	2
Horn is not a constant note \|1.7.3c\|	2
Front position lamp deteriorated and function impaired \|1.1.1b\|	2
Offside Stop lamp does not illuminate immediately a brake applies \|1.3.1a\|	2
Fuel cap sealing washer missing \|7.2.2c\|	2
Rear Brake lever is damaged and the brake cannot be readily applied \|3.1.3c\|	2
All position lamps do not illuminate immediately when switched on \|1.1.3a\|	2
Roller brake test Neither brake control achieves an efficiency of 25% \|3.3.A2b\|	2
Rear Brake lever has insufficient reserve travel \|1.1.2 \|a\|\|	2
Front Roller brake test indicates a binding brake \|3.3.A1a\|	2
Offside Headlamp at least one does not illuminate on dipped beam \|1.2.2a\|i\|\|	2
Front Brake disc\|s\| excessively scored \|3.2.A1l\|	2
Leg shield insecure and likely to impede the steering \|2.1.2e\|	2
Fuel pipe leaking \|7.2.1a\|	2
Rear position lamp missing \|1.1.1a\|	2
Direction indicators flashing less than 60 times a minute \|1.5.1c\|	2
Rear Valve stem seriously damaged (5.2.3 (j))	2
Rear reflector missing (4.8.2 (a) (ii))	2
Front Stop lamp not working (4.3.1 (a) (ii))	2
Front Wheel bearing rough when rotated (5.1.3 (b) (i))	2

We get to these numbers by trawling through over 1 billion MOT test results since 2004 and crunched the numbers. We remove anything to do with Tyres, as they are model independent and group together common non-model specific issues. We are trying to get to a picture of what models have what issues.

Please note: We take the data from the DVSA. This data is raw and can contain typos and spelling mistakes that garages may have entered while recording a MOT result. Specifically miss-match on names of models and makes. We are constantly cleaning the data so bear with the odd issue.

Got suggestions? We’re improving this section all the time. If you have any suggestions, please let us know.

Most common failures	No# failures
Headlamp aim out of alignment	95
Stop lamp does not illuminate immediately a brake applies \|1.3.1a\|	41
Exhaust is leaking and excessively noisey \|7.1.1b\|	35
Front Stop lamp does not illuminate immediately a brake applies \|1.3.1a\|	33
Headlamp insecure \|1.2.3b\|	31
Rear Brake lever has inadequate reserve travel \|3.1.3b\|	29
Headlamp at least one does not illuminate on dipped beam \|1.2.2a\|i\|\|	29
Rear reflector on motorcycle missing \|1.4.1\|	22
Rear Stop lamp does not illuminate immediately a brake applies \|1.3.1a\|	20
Registration plate issues	20
Rear position lamp does not illuminate immediately when it is switched on \|1.1.3a\|	18
Front wheel bearings have excessive free play \|2.3.5b\|	15
Nearside Rear Direction indicator not working \|1.5.1c\|	12
Rear reflector on motorcycle obscured \|1.4.1\|	10
Front wheel bearings are excessively rough \|2.3.5b\|	10
Roller brake test The less effective brake control does not achieve an efficiency of 25%. \|3.3.A2b\|	9
Stop lamp remains on when the brake is released \|1.3.1e\|	8
Steering headbearing has excessive free play \|2.2.2\|	8
Nearside Front shock absorber seal failed and leaking oil \|2.3.3\|	8
Headlamp at least one does not illuminate on main beam \|1.2.2a\|ii\|\|	8
Exhaust excessively deteriorated \|7.1.1a\|	7
Rear Brake lever insecure \|3.1.2a\|	7
Nearside Front Direction indicator not working \|1.5.1c\|	7
Offside Rear Direction indicator not working \|1.5.1c\|	7
Front position lamp does not illuminate immediately when switched on \|1.1.3a\|	7
Steering movement excessively `notchy` with the wheel raised \|2.2.1b\|	6
Wheel alignment incorrect which adversely affects the steering \|2.5.1\|	6
Headlamp aim not tested \|1.6\|	6
Front Brake disc\|s\| excessively worn \|3.2.A1l\|	6
Horn not working \|1.7.3a\|	5
Offside Front Direction indicators not working \|1.5.1c\|	5
Offside Front Direction indicator not working \|1.5.1c\|	5
Fairings insecure and likely to impede the steering \|2.1.2e\|	5
Front Exhaust is leaking and excessively noisey \|7.1.1b\|	5
Exhaust mounting does not fully support the exhaust system \|7.1.1.c\|	5
Front suspension assembly component excessively misaligned \|2.3.1\|	5
Nearside Indicator tell tale not functioning \|1.5.2\|	5
Riders seat insecure \|6.2.1a\|	5
Fuel system component leaking \|7.2.1a\|	4
Rear Rear position lamp does not illuminate immediately when it is switched on \|1.1.3a\|	4
Front Brake disc\|s\| friction surface contaminated by oil or grease \|3.2.A1k\|	4
Wheel alignment incorrect which adversely affects the handling \|2.5.1\|	4
Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking \|6.1.1c\|	4
Front Fairings insecure and likely to impede the steering \|2.1.2e\|	4
Direction indicators not working \|1.5.1c\|	4
Handlebar deformed \|2.1.1b\|	4
Headlamp main beam affected by the operation of another lamp \|1.2.2c\|	4
Rear reflector on motorcycle obscured \|1.4.2b\|	4
Front Headlamp at least one does not illuminate on dipped beam \|1.2.2a\|i\|\|	4
Rear Roller brake test indicates a binding brake \|3.3.A1a\|	3
Rear shock absorber has inadequate damping effect. \|2.4.A.3b\|	3
Exhaust noise is clearly in excess of that emitted by a similar motor bicycle fitted with a standard silencer in average condition \|7.1.2\|	3
Rear Rear reflector on motorcycle obscured \|1.4.1\|	3
Rear Roller brake test indicates a sticking brake \|3.3.A1a\|	3
Rear Stop lamp remains on when the brake is released \|1.3.1e\|	3
Nearside Rear Direction indicators not working \|1.5.1c\|	3
An item not tested \|Manual\|	3
Direction indicators affected by the operation of another lamp \|1.5.1c\|	3
Throttle operating incorrectly \|6.2.1f\|	3
Fuel hose leaking \|7.2.1a\|	3
Nearside Brake lever has inadequate reserve travel \|3.1.3b\|	3
Nearside Front Direction indicators not working \|1.5.1c\|	3
Nearside Handlebar handgrip not secure to handlebars. \|2.1.1c\|	3
Front shock absorber seal failed and leaking oil \|2.3.3\|	3
Brake lever has inadequate reserve travel \|3.1.3b\|	3
Rear Brake lever mounting insecure \|3.1.2a\|	3
Horn not loud enough to be heard by another road user \|1.7.3a\|	3
Steering movement excessively `notchy` with the weight on the lower bearing \|2.2.1a\|	3
Direction indicators flashing more than 120 times per minute \|1.5.1c\|	3
Front Roller brake test indicates excessive fluctuation of brake effort \|3.3.A1d\|	3
Horn control defective \|1.7.2a\|	2
Front Brake disc\|s\| has excessive run out \|3.2.A1m\|	2
Front Brake lever has inadequate reserve travel \|3.1.3b\|	2
Rear wheel bearings have excessive free play \|2.4.A.2c\|	2
Steering movement excessively stiff with the wheel raised \|2.2.1b\|	2
Offside Rear Exhaust is leaking and excessively noisey \|7.1.1b\|	2
Nearside Front Front shock absorber seal failed and leaking oil \|2.3.3\|	2
Offside Front Front shock absorber seal failed and leaking oil \|2.3.3\|	2
Headlamp aim headlamp deteriorated and function impaired \|1.2.3a\|	2
Front Motorcycle structure excessively damaged \|6.1.1a\|	2
Nearside Direction indicator flashing less than 60 times a minute \|1.5.1c\|	2
Rear wheel rotation likely to be impeded \|6.2.1b\|	2
Nearside Front Shock absorber has a serious fluid leak \|5.3.2 \|b\|\|	2
Offside Front Headlamp at least one does not illuminate on dipped beam \|1.2.2a\|i\|\|	2
Rear position lamp insecure \|1.1.1c\|	2
Front Stop lamp remains on when the brake is released \|1.3.1e\|	2
Rear Rear position lamp insecure \|1.1.1c\|	2
Offside Rear Direction indicators not working \|1.5.1c\|	2
Front Brake lever insecure \|3.1.2a\|	2
Rear Brake lever attachment screws loose \|3.1.2b\|	2
Rear Brake lever cannot be released smoothly \|3.1.3d\|	2
Front position lamp insecure \|1.1.1c\|	2
Headlamp dipped beam affected by the operation of another lamp \|1.2.2c\|	2
Nearside Front position lamp does not illuminate immediately when switched on \|1.1.3a\|	2
Front position lamp adversely affected by the operation of another lamp \|1.1.3b\|	2
Direction indicator flashing less than 60 times a minute \|1.5.1c\|	2
Exhaust has part of the system missing \|7.1.1a\|	2
Horn is not a constant note \|1.7.3c\|	2
Front position lamp deteriorated and function impaired \|1.1.1b\|	2
Offside Stop lamp does not illuminate immediately a brake applies \|1.3.1a\|	2
Fuel cap sealing washer missing \|7.2.2c\|	2
Rear Brake lever is damaged and the brake cannot be readily applied \|3.1.3c\|	2
All position lamps do not illuminate immediately when switched on \|1.1.3a\|	2
Roller brake test Neither brake control achieves an efficiency of 25% \|3.3.A2b\|	2
Rear Brake lever has insufficient reserve travel \|1.1.2 \|a\|\|	2
Front Roller brake test indicates a binding brake \|3.3.A1a\|	2
Offside Headlamp at least one does not illuminate on dipped beam \|1.2.2a\|i\|\|	2
Front Brake disc\|s\| excessively scored \|3.2.A1l\|	2
Leg shield insecure and likely to impede the steering \|2.1.2e\|	2
Fuel pipe leaking \|7.2.1a\|	2
Rear position lamp missing \|1.1.1a\|	2
Direction indicators flashing less than 60 times a minute \|1.5.1c\|	2
Rear Valve stem seriously damaged (5.2.3 (j))	2
Rear reflector missing (4.8.2 (a) (ii))	2
Front Stop lamp not working (4.3.1 (a) (ii))	2
Front Wheel bearing rough when rotated (5.1.3 (b) (i))	2

MOT History from tests of petrol YAMAHA YN50s year 2004

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