MOT History from tests of petrol YAMAHA YN50s year 2003

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:71.46%

(The average a petrol YAMAHA YN50 year 2003 passes without issue)

Based on:2,074 MOT Tests

Most common failures	No# failures
Headlamp aim out of alignment	124
Front Stop lamp does not illuminate immediately a brake applies \|1.3.1a\|	80
Stop lamp does not illuminate immediately a brake applies \|1.3.1a\|	50
Exhaust is leaking and excessively noisey \|7.1.1b\|	44
Rear Stop lamp does not illuminate immediately a brake applies \|1.3.1a\|	36
Rear Brake lever has inadequate reserve travel \|3.1.3b\|	35
Headlamp at least one does not illuminate on dipped beam \|1.2.2a\|i\|\|	30
Rear reflector on motorcycle missing \|1.4.1\|	28
Headlamp insecure \|1.2.3b\|	25
Registration plate issues	25
Rear position lamp does not illuminate immediately when it is switched on \|1.1.3a\|	20
Steering headbearing has excessive free play \|2.2.2\|	18
Roller brake test The less effective brake control does not achieve an efficiency of 25%. \|3.3.A2b\|	18
Front wheel bearings have excessive free play \|2.3.5b\|	17
Headlamp at least one does not illuminate on main beam \|1.2.2a\|ii\|\|	16
Rear reflector on motorcycle obscured \|1.4.1\|	14
Nearside Rear Direction indicator not working \|1.5.1c\|	13
Riders seat insecure \|6.2.1a\|	12
Wheel alignment incorrect which adversely affects the handling \|2.5.1\|	11
Horn not working \|1.7.3a\|	10
Rear Brake lever insecure \|3.1.2a\|	8
Front wheel bearings are excessively rough \|2.3.5b\|	8
Rear Rear position lamp does not illuminate immediately when it is switched on \|1.1.3a\|	8
Nearside Headlamp at least one does not illuminate on dipped beam \|1.2.2a\|i\|\|	7
Fairings insecure and likely to impede the steering \|2.1.2e\|	7
Nearside Front Direction indicators not working \|1.5.1c\|	7
Front Brake disc\|s\| friction surface contaminated by oil or grease \|3.2.A1k\|	7
Offside Headlamp at least one does not illuminate on dipped beam \|1.2.2a\|i\|\|	6
Rear Rear reflector on motorcycle missing \|1.4.1\|	6
Headlamp aim not tested \|1.6\|	6
Nearside Rear Direction indicators not working \|1.5.1c\|	6
Offside Front Direction indicators not working \|1.5.1c\|	6
Exhaust mounting does not fully support the exhaust system \|7.1.1.c\|	6
Direction indicators not working \|1.5.1c\|	6
Nearside Front shock absorber seal failed and leaking oil \|2.3.3\|	6
Nearside Front Direction indicator not working \|1.5.1c\|	5
Registration plate lamp issues	5
Front Steering headbearing has excessive free play \|2.2.2\|	5
Steering movement excessively `notchy` with the wheel raised \|2.2.1b\|	5
Front Brake disc\|s\| excessively worn \|3.2.A1l\|	5
Horn control defective \|1.7.2a\|	5
Front Front wheel bearings have excessive free play \|2.3.5b\|	5
Front Exhaust is leaking and excessively noisey \|7.1.1b\|	5
Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking \|6.1.1c\|	5
Offside Front shock absorber seal failed and leaking oil \|2.3.3\|	5
Nearside Brake lever has inadequate reserve travel \|3.1.3b\|	5
Front Roller brake test indicates excessive fluctuation of brake effort \|3.3.A1d\|	5
Stop lamp affected by the operation of another lamp \|1.3.2\|	4
Offside Rear Footrest insecure \|6.2.1a\|	4
Offside Rear Direction indicators not working \|1.5.1c\|	4
Offside Headlamp at least one does not illuminate on main beam \|1.2.2a\|ii\|\|	4
Headlamp aim beam image kick up to the offside \|1.6\|	4
Steering movement excessively `notchy` with the weight on the lower bearing \|2.2.1a\|	4
Rear Rear reflector on motorcycle obscured \|1.4.1\|	4
Direction indicators flashing more than 120 times per minute \|1.5.1c\|	4
Rear reflector on motorcycle obscured \|1.4.2b\|	4
Exhaust excessively deteriorated \|7.1.1a\|	4
Wheel alignment incorrect which adversely affects the steering \|2.5.1\|	4
Front position lamp does not illuminate immediately when switched on \|1.1.3a\|	4
Front shock absorber seal failed and leaking oil \|2.3.3\|	4
Rear shock absorber has inadequate damping effect. \|2.4.A.3b\|	4
Offside Rear Direction indicator not working \|1.5.1c\|	4
Nearside Direction indicator not working \|1.5.1c\|	3
Throttle operating incorrectly \|6.2.1f\|	3
Roller brake test No brake control achieves an efficiency of 30%. \|3.3.A2a\|	3
Horn sounds harsh or grating \|1.7.3c\|	3
Exhaust mounting missing \|7.1.1c\|	3
Front Stop lamp remains on when the brake is released \|1.3.1e\|	3
Front Headlamp at least one does not illuminate on dipped beam \|1.2.2a\|i\|\|	3
Steering movement excessively stiff with the weight on the lower bearing \|2.2.1a\|	3
Front Brake lever has inadequate reserve travel \|3.1.3b\|	3
Front Front wheel bearings are excessively rough \|2.3.5b\|	3
Rear Direction indicators not working \|1.5.1c\|	3
Rear wheel bearings have excessive free play \|2.4.A.2c\|	3
Offside Front Stop lamp does not illuminate immediately a brake applies \|1.3.1a\|	3
Nearside Brake lever mounting insecure \|3.1.2a\|	3
Direction indicators flashing less than 60 times a minute \|1.5.1c\|	3
Rear Exhaust is leaking and excessively noisey \|7.1.1b\|	3
Offside Front Direction indicator not working \|1.5.1c\|	3
Headlamp dipped beam affected by the operation of another lamp \|1.2.2c\|	3
Handlebar deformed \|2.1.1b\|	3
Front Fairings insecure and likely to impede the steering \|2.1.2e\|	3
Front Handlebar deformed \|2.1.1b\|	3
Stop lamp remains on when the brakes are released	3
Nearside Rear Direction indicator not working (4.4.1 (a) (ii))	3
Dipswitch does not deflect the main beam/s, making them into dipped beam/s \|1.2.2b\|ii\|\|	2
Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort \|3.3.A1c\|	2
Direction indicator affected by the operation of another lamp \|1.5.1c\|	2
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\|	2
Rear wheel rotation likely to be impeded \|6.2.1b\|	2
Front position lamp damaged and function impaired \|1.1.1b\|	2
Rear Rear wheel bearings have excessive free play \|2.4.A.2c\|	2
Brake lever has inadequate reserve travel \|3.1.3b\|	2
Brake lever insecure \|3.1.2a\|	2
Nearside Front Headlamp at least one does not illuminate on dipped beam \|1.2.2a\|i\|\|	2
Rear Stop lamp deteriorated and function impaired \|1.3.3a\|	2
Direction indicator not working \|1.5.1c\|	2
Front Direction indicators not working \|1.5.1c\|	2
Nearside Indicator tell tale not functioning \|1.5.2\|	2
Rear Brake locking device insecure \|3.2.A1e\|	2
Locking devices not correctly fitted which may make the motor bicycle dangerous to ride \|6.2.1h\|	2
Front Brake component leaking fluid \|3.2.B4\|	2
Front Roller brake test indicates a severely juddering brake \|3.3.A1b\|	2
Horn not loud enough to be heard by another road user \|1.7.3a\|	2
Centre Rear Rear reflector on motorcycle missing \|1.4.1\|	2
Front Stop lamp not working \|4.3.1 \|a\| \|ii\|\|	2
Front Headlamp insecure \|1.2.3b\|	2
Front position lamp insecure \|1.1.1c\|	2
Nearside Direction indicators not working \|1.5.1c\|	2
Headlamp incorrect colour \|1.2.1\|	2
Offside Direction indicator not working \|1.5.1c\|	2
Rear shock absorber seal failed and leaking oil \|2.4.A.1c\|	2
Front suspension has inadequate damping effect. \|2.3.6c\|	2
Offside Front Front shock absorber seal failed and leaking oil \|2.3.3\|	2
Front Headlamp at least one does not illuminate on main beam \|1.2.2a\|ii\|\|	2
Rear Brake lever mounting insecure \|3.1.2a\|	2
Nearside Rear Brake lever has inadequate reserve travel \|3.1.3b\|	2
Offside Handlebar handgrip not secure to handlebars. \|2.1.1c\|	2
Front Brake caliper\|s\| securing bolt\|s\| loose \|3.2.A1j\|	2
Front Front mudguard insecure \|2.3.7\|	2
Rear position lamp adversely affected by the operation of another lamp \|1.1.3b\|	2
Front suspension assembly component excessively misaligned \|2.3.1\|	2
Headlamp switch faulty \|1.2.4\|	2
Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort \|3.3.A1c\|	2
Headlamp main beam affected by the operation of another lamp \|1.2.2c\|	2
Front Stop lamp not working (4.3.1 (a) (ii))	2
Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i))	2
Rear reflector missing (4.8.2 (a) (ii))	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	124
Front Stop lamp does not illuminate immediately a brake applies \|1.3.1a\|	80
Stop lamp does not illuminate immediately a brake applies \|1.3.1a\|	50
Exhaust is leaking and excessively noisey \|7.1.1b\|	44
Rear Stop lamp does not illuminate immediately a brake applies \|1.3.1a\|	36
Rear Brake lever has inadequate reserve travel \|3.1.3b\|	35
Headlamp at least one does not illuminate on dipped beam \|1.2.2a\|i\|\|	30
Rear reflector on motorcycle missing \|1.4.1\|	28
Headlamp insecure \|1.2.3b\|	25
Registration plate issues	25
Rear position lamp does not illuminate immediately when it is switched on \|1.1.3a\|	20
Steering headbearing has excessive free play \|2.2.2\|	18
Roller brake test The less effective brake control does not achieve an efficiency of 25%. \|3.3.A2b\|	18
Front wheel bearings have excessive free play \|2.3.5b\|	17
Headlamp at least one does not illuminate on main beam \|1.2.2a\|ii\|\|	16
Rear reflector on motorcycle obscured \|1.4.1\|	14
Nearside Rear Direction indicator not working \|1.5.1c\|	13
Riders seat insecure \|6.2.1a\|	12
Wheel alignment incorrect which adversely affects the handling \|2.5.1\|	11
Horn not working \|1.7.3a\|	10
Rear Brake lever insecure \|3.1.2a\|	8
Front wheel bearings are excessively rough \|2.3.5b\|	8
Rear Rear position lamp does not illuminate immediately when it is switched on \|1.1.3a\|	8
Nearside Headlamp at least one does not illuminate on dipped beam \|1.2.2a\|i\|\|	7
Fairings insecure and likely to impede the steering \|2.1.2e\|	7
Nearside Front Direction indicators not working \|1.5.1c\|	7
Front Brake disc\|s\| friction surface contaminated by oil or grease \|3.2.A1k\|	7
Offside Headlamp at least one does not illuminate on dipped beam \|1.2.2a\|i\|\|	6
Rear Rear reflector on motorcycle missing \|1.4.1\|	6
Headlamp aim not tested \|1.6\|	6
Nearside Rear Direction indicators not working \|1.5.1c\|	6
Offside Front Direction indicators not working \|1.5.1c\|	6
Exhaust mounting does not fully support the exhaust system \|7.1.1.c\|	6
Direction indicators not working \|1.5.1c\|	6
Nearside Front shock absorber seal failed and leaking oil \|2.3.3\|	6
Nearside Front Direction indicator not working \|1.5.1c\|	5
Registration plate lamp issues	5
Front Steering headbearing has excessive free play \|2.2.2\|	5
Steering movement excessively `notchy` with the wheel raised \|2.2.1b\|	5
Front Brake disc\|s\| excessively worn \|3.2.A1l\|	5
Horn control defective \|1.7.2a\|	5
Front Front wheel bearings have excessive free play \|2.3.5b\|	5
Front Exhaust is leaking and excessively noisey \|7.1.1b\|	5
Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking \|6.1.1c\|	5
Offside Front shock absorber seal failed and leaking oil \|2.3.3\|	5
Nearside Brake lever has inadequate reserve travel \|3.1.3b\|	5
Front Roller brake test indicates excessive fluctuation of brake effort \|3.3.A1d\|	5
Stop lamp affected by the operation of another lamp \|1.3.2\|	4
Offside Rear Footrest insecure \|6.2.1a\|	4
Offside Rear Direction indicators not working \|1.5.1c\|	4
Offside Headlamp at least one does not illuminate on main beam \|1.2.2a\|ii\|\|	4
Headlamp aim beam image kick up to the offside \|1.6\|	4
Steering movement excessively `notchy` with the weight on the lower bearing \|2.2.1a\|	4
Rear Rear reflector on motorcycle obscured \|1.4.1\|	4
Direction indicators flashing more than 120 times per minute \|1.5.1c\|	4
Rear reflector on motorcycle obscured \|1.4.2b\|	4
Exhaust excessively deteriorated \|7.1.1a\|	4
Wheel alignment incorrect which adversely affects the steering \|2.5.1\|	4
Front position lamp does not illuminate immediately when switched on \|1.1.3a\|	4
Front shock absorber seal failed and leaking oil \|2.3.3\|	4
Rear shock absorber has inadequate damping effect. \|2.4.A.3b\|	4
Offside Rear Direction indicator not working \|1.5.1c\|	4
Nearside Direction indicator not working \|1.5.1c\|	3
Throttle operating incorrectly \|6.2.1f\|	3
Roller brake test No brake control achieves an efficiency of 30%. \|3.3.A2a\|	3
Horn sounds harsh or grating \|1.7.3c\|	3
Exhaust mounting missing \|7.1.1c\|	3
Front Stop lamp remains on when the brake is released \|1.3.1e\|	3
Front Headlamp at least one does not illuminate on dipped beam \|1.2.2a\|i\|\|	3
Steering movement excessively stiff with the weight on the lower bearing \|2.2.1a\|	3
Front Brake lever has inadequate reserve travel \|3.1.3b\|	3
Front Front wheel bearings are excessively rough \|2.3.5b\|	3
Rear Direction indicators not working \|1.5.1c\|	3
Rear wheel bearings have excessive free play \|2.4.A.2c\|	3
Offside Front Stop lamp does not illuminate immediately a brake applies \|1.3.1a\|	3
Nearside Brake lever mounting insecure \|3.1.2a\|	3
Direction indicators flashing less than 60 times a minute \|1.5.1c\|	3
Rear Exhaust is leaking and excessively noisey \|7.1.1b\|	3
Offside Front Direction indicator not working \|1.5.1c\|	3
Headlamp dipped beam affected by the operation of another lamp \|1.2.2c\|	3
Handlebar deformed \|2.1.1b\|	3
Front Fairings insecure and likely to impede the steering \|2.1.2e\|	3
Front Handlebar deformed \|2.1.1b\|	3
Stop lamp remains on when the brakes are released	3
Nearside Rear Direction indicator not working (4.4.1 (a) (ii))	3
Dipswitch does not deflect the main beam/s, making them into dipped beam/s \|1.2.2b\|ii\|\|	2
Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort \|3.3.A1c\|	2
Direction indicator affected by the operation of another lamp \|1.5.1c\|	2
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\|	2
Rear wheel rotation likely to be impeded \|6.2.1b\|	2
Front position lamp damaged and function impaired \|1.1.1b\|	2
Rear Rear wheel bearings have excessive free play \|2.4.A.2c\|	2
Brake lever has inadequate reserve travel \|3.1.3b\|	2
Brake lever insecure \|3.1.2a\|	2
Nearside Front Headlamp at least one does not illuminate on dipped beam \|1.2.2a\|i\|\|	2
Rear Stop lamp deteriorated and function impaired \|1.3.3a\|	2
Direction indicator not working \|1.5.1c\|	2
Front Direction indicators not working \|1.5.1c\|	2
Nearside Indicator tell tale not functioning \|1.5.2\|	2
Rear Brake locking device insecure \|3.2.A1e\|	2
Locking devices not correctly fitted which may make the motor bicycle dangerous to ride \|6.2.1h\|	2
Front Brake component leaking fluid \|3.2.B4\|	2
Front Roller brake test indicates a severely juddering brake \|3.3.A1b\|	2
Horn not loud enough to be heard by another road user \|1.7.3a\|	2
Centre Rear Rear reflector on motorcycle missing \|1.4.1\|	2
Front Stop lamp not working \|4.3.1 \|a\| \|ii\|\|	2
Front Headlamp insecure \|1.2.3b\|	2
Front position lamp insecure \|1.1.1c\|	2
Nearside Direction indicators not working \|1.5.1c\|	2
Headlamp incorrect colour \|1.2.1\|	2
Offside Direction indicator not working \|1.5.1c\|	2
Rear shock absorber seal failed and leaking oil \|2.4.A.1c\|	2
Front suspension has inadequate damping effect. \|2.3.6c\|	2
Offside Front Front shock absorber seal failed and leaking oil \|2.3.3\|	2
Front Headlamp at least one does not illuminate on main beam \|1.2.2a\|ii\|\|	2
Rear Brake lever mounting insecure \|3.1.2a\|	2
Nearside Rear Brake lever has inadequate reserve travel \|3.1.3b\|	2
Offside Handlebar handgrip not secure to handlebars. \|2.1.1c\|	2
Front Brake caliper\|s\| securing bolt\|s\| loose \|3.2.A1j\|	2
Front Front mudguard insecure \|2.3.7\|	2
Rear position lamp adversely affected by the operation of another lamp \|1.1.3b\|	2
Front suspension assembly component excessively misaligned \|2.3.1\|	2
Headlamp switch faulty \|1.2.4\|	2
Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort \|3.3.A1c\|	2
Headlamp main beam affected by the operation of another lamp \|1.2.2c\|	2
Front Stop lamp not working (4.3.1 (a) (ii))	2
Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i))	2
Rear reflector missing (4.8.2 (a) (ii))	2

MOT History from tests of petrol YAMAHA YN50s year 2003

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