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MOT History from tests of petrol YAMAHA UNKNOWNs year 1991

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

mot history
Pass percent:77.46%
(The average a petrol YAMAHA UNKNOWN year 1991 passes without issue)
Based on:417 MOT Tests
Most common failuresNo# failures
Headlamp aim out of alignment13
Registration plate issues8
Rear reflector missing (4.8.2 (a) (ii))5
All direction indicators not working (4.4.1 (a) (ii))5
Horn not working (7.7 (a) (ii))5
Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a|3
Nearside Front Direction indicator not working (4.4.1 (a) (ii))3
Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i))3
Headlamp at least one does not illuminate on main beam |1.2.2a|ii||2
Headlamp aim beam image kick up to the offside |1.6|2
Nearside Front Front shock absorber seal failed and leaking oil |2.3.3|2
Exhaust is leaking and excessively noisey |7.1.1b|2
Front Direction indicators not working |1.5.1c|2
Rear Direction indicators not working |1.5.1c|2
Rear Brake caliper insecurely mounted and braking performance affected |1.1.16 |c| |ii||2
Rear Stop lamp not working |4.3.1 |a| |ii||2
Nearside Front shock absorber seal failed and leaking oil |2.3.3|2
Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a|2
Front Shock absorber has a serious fluid leak (5.3.2 (b))2
Front Brake excessively binding (1.2.1 (f))2
Front Headlamp not working on dipped beam (4.1.1 (a) (ii))2
Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b))2
Rear Position lamp not working (4.2.1 (a))2
Horn not working (7.7 (a))2
Headlamp at least one does not illuminate on dipped beam |1.2.2a|i||1
Offside Front Shock absorber has a serious fluid leak |5.3.2 |b||1
Rear reflector on motorcycle obscured |1.4.2b|1
Front Throttle operating incorrectly |6.2.1f|1
Front Front mudguard insecure |2.3.7|1
Horn missing |1.7.1|1
Rear Direction indicator not working both |1.4.A.2c|1
Horn not working sticking on |1.6.2a|1
Stop lamp not working on handle bar brake |1.2.1b|1
Registration plate lamp issues1
Exhaust system not adequately supported |7.1.1|1
Front Shock absorber has a serious fluid leak |2.7.3|1
Rear brake binding1
Offside Front Front shock absorber seal failed and leaking oil |2.3.3|1
Steering movement excessively stiff with the wheel raised |2.2.1b|1
Front shock absorber seal failed and leaking oil |2.3.3|1
Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d|1
Lower Rear suspension bush has excessive free play |2.4.A2a|i||1
Drive chain sprocket carrier worn to excess |6.2.1e|1
Rear wheel spindle securing nut locking device missing |2.4.A.2b|1
Lower Rear mono-shock pivot excessively worn |2.4.B.4|1
Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b|1
Horn not loud enough to be heard by another road user |1.7.3a|1
Rear Suspension component ball joint excessively worn |5.3.4 |a| |i||1
Rear Shock absorber has negligible damping effect |5.3.2 |b||1
Front Suspension damaged and seriously weakened |5.3.3 |b| |i||1
Horn sound not in accordance with requirements |7.7 |c||1
Roller brake test Neither brake control achieves an efficiency of 25% |1.2.2 |a| |i||1
Brake disc|s| insecure |3.2.A1g|1
Rear shock absorber has inadequate damping effect. |2.4.A.3b|1
Steering headbearing has excessive free play |2.2.2|1
Front Stop lamp does not illuminate immediately a brake applies |1.3.1a|1
Front Direction indicator not working |1.5.1c|1
Rear Direction indicator not working |1.5.1c|1
Horn not working |1.7.3a|1
Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii||1
Locking devices not correctly fitted which may make the motor bicycle dangerous to ride rear wheel spindle pin missing |6.2.1h|1
Stop lamp remains on when the brakes are released1
Exhaust has a major leak of exhaust gases |6.1.2 |a||1
Brake performance not tested |3.3|1
Rear Wheel bearing has excessive play |5.1.3 |a| |i||1
Front Stop lamp not working |4.3.1 |a| |ii||1
Rear suspension movement is excessively stiff |2.4.A.3b|1
Rear Roller brake test indicates a binding brake |3.3.A1a|1
Rear Brake disc|s| cracked |3.2.A1g|1
Exhaust markings indicating not for road use or similar wording |7.1.4|1
Front position lamp does not illuminate immediately when switched on |1.1.3a|1
Sidecar rear position lamp obscured more than 50% |1.1.1d|1
Exhaust excessively deteriorated |7.1.1a|1
Steering movement excessively `notchy` with the wheel raised |2.2.1b|1
Rear Rear suspension movement is excessively stiff |2.4.A.3b|1
Offside Front Direction indicator not working |1.5.1c|1
Central Rear Stop lamp does not illuminate immediately a brake applies bulb blown |1.3.1a|1
Central Rear Rear reflector on motorcycle dirty and function impaired wipe clean |1.4.2a|1
Central Front Riders seat insecure bolts loose |6.2.1a|1
Locking devices not correctly fitted which may make the motor bicycle dangerous to ride REAR ENGINE MOUNTING/SWING ARM BOLT |6.2.1h|1
Front Brake disc|s| excessively worn |3.2.A1l|1
Locking devices not correctly fitted which may make the motor bicycle dangerous to ride NSR CHAIN ADJUSTER |6.2.1h|1
Suspension arm pin or bush excessively worn |5.3.4 |a| |i||1
Front Brake hose leaking fluid |3.2.B4|1
Front Brake cylinder leaking |1.1.16 |b| |i||1
Rear Brake disc significantly and obviously worn |1.1.14 |a| |i||1
Rear Wheel fixing missing |single fixing| |5.2.1 |a| |ii||1
Offside Handlebar handgrip not secure to handlebars. |2.1.1c|1
Rear wheel bearings have excessive free play |2.4.A.2c|1
Front Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride wheel pin split pin missing |6.2.1h|1
Front Brake excessively binding |1.2.1 |f||1
Rear Lower Suspension component pin or bush excessively worn |5.3.4 |a| |i||1
Rear Brake excessively binding |1.2.1 |f||1
Nearside Front Brake caliper insecurely mounted and braking performance affected |1.1.16 |c| |ii||1
Offside Front Brake caliper insecurely mounted and braking performance affected |1.1.16 |c| |ii||1
Rear Rear reflector missing |4.8.2 |a| |ii||1
Nearside Front Direction indicator not working |4.4.1 |a| |ii||1
Offside Front Brake hose leaking |1.1.12 |c||1
Rear Wheel damaged or distorted to the extent that control of the motorcycle is likely to be adversely affected |5.2.2 |c| |ii||1
Offside Headlamp not working on dipped beam |4.1.1 |a| |ii||1
Rear Suspension component ball joint excessively worn excess play in mono shock link, fixing bolts loose |5.3.4 |a| |i||1
Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition |8.1.1 |a||1
Exhaust silencer insecure |8.1.1 |b| |i||1
Horn not working |7.7 |a| |ii||1
Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i))1
Rear Brake component insecure Torque arm (1.1.21 (c))1
Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii))1
Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii))1
Throttle control functioning such that safe operation of the motorcycle is adversely affected Grip come off in hand (6.2.7 (a) (ii))1
Brake lever has insufficient reserve travel (1.1.2 (a))1
Rear Brake excessively binding (1.2.1 (f))1
Stop lamp not working (4.3.1 (a) (ii))1
Rear Rear reflector missing (4.8.2 (a) (ii))1
Front Headlamp aim not tested (4.1.2 (b))1
Horn sound not in accordance with requirements (7.7 (c))1
Rear Vehicle identification number incomplete (0.2 (b))1
Offside Front Shock absorber has a serious fluid leak (5.3.2 (b))1
Front Brake grabbing severely (1.2.1 (c))1
Front Suspension arm ball joint dust cover missing split pin (5.3.4 (b) (ii))1
Fuel system component leaking carb (6.1.3 (b) (i))1
Front Headlamp not working on main beam (4.1.1 (a) (ii))1
Stop lamp not working with lights on (4.3.1 (a) (ii))1
All direction indicators adversely affected by the operation of another lamp (4.4.3 (b))1
Fuel cap leaking (6.1.3 (b) (i))1
Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e))1
Front Brake effort inadequate at a wheel (1.2.1 (a) (i))1
Front Valve stem seriously damaged (5.2.3 (j))1
Handlebar grip insecure to handlebar (2.2.1 (d) (ii))1
Steering linkage ball joint has excessive play (2.1.3 (b) (i))1
Rear Stop lamp not working (4.3.1 (a) (ii))1
Offside Front Headlamp not working on main beam (4.1.1 (a) (ii))1
Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii))1
Headlamp not working on dipped beam (4.1.1 (a) (ii))1
Steering headbearing has excessive wear or free play (2.2.2 (f) (i))1
Wheel more than one fixing loose (5.2.1 (a) (ii))1
Front Brake lever not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii))1
Front Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a))1
Headlamp insecure (4.1.1 (c))1
Fuel tank leaking (6.1.3 (b) (i))1
Rear Brake drum insecure (1.1.14 (a) (ii))1
Rear Rear reflector reflecting white to the rear (4.8.2 (a) (ii))1
Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i))1
Offside Front Brake caliper insecurely mounted and braking performance affected (1.1.16 (c) (ii))1
Central Rear Stop lamp not working (4.3.1 (a) (ii))1
Front Exhaust has a major leak of exhaust gases cylinder head to downpipe attachment. (6.1.2 (a))1
Offside Headlamp not working on dipped beam (4.1.1 (a) (ii))1
Nearside Front Shock absorber has a serious fluid leak Fork seal (5.3.2 (b))1
Offside Front Shock absorber has a serious fluid leak Fork seal (5.3.2 (b))1
Drive chain excessively loose (6.1.7 (c) (i))1
Fuel tank insecure Rear fixing missing (6.1.3 (a) (i))1

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.

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