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MOT History from tests of petrol YAMAHA UNKNOWNs year 1979

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:84.74%
(The average a petrol YAMAHA UNKNOWN year 1979 passes without issue)
Based on:321 MOT Tests
Most common failuresNo# failures
Headlamp aim out of alignment7
Rear reflector on motorcycle missing |1.4.1|3
Rear wheel spindle securing nut locking device missing |2.4.A.2b|3
Registration plate issues3
Front Stop lamp does not illuminate immediately a brake applies |1.3.1a|2
Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a|2
Front Roller brake test indicates a binding brake |3.3.A1a|2
Horn not loud enough to be heard by another road user |1.7.3a|2
Horn not working |7.7 |a| |ii||2
Stop lamp not working |4.3.1 |a| |ii||2
Fuel tank insecure (6.1.3 (a) (i))2
Rear Position lamp not working (4.2.1 (a))2
Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii||1
Fuel cap ineffective |6.1.3 |b| |i||1
Front Brake excessively binding |1.2.1 |f||1
Nearside Shock absorber has a serious fluid leak Fork leg |5.3.2 |b||1
Steering headbearing has excessive wear or free play |2.2.2 |f| |i||1
Front Plate brake test indicates a binding brake |3.3.B1a|1
Drive chain excessively loose |6.2.1d|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
Direction indicators affected by the operation of another lamp |1.5.1c|1
Rear position lamp adversely affected by the operation of another lamp |1.1.3b|1
Front position lamp does not illuminate immediately when switched on hi beam |1.1.3a|1
Rear Wheel alignment incorrect which adversely affects the handling 3cm to o/s |2.5.1|1
Nearside Front Direction indicator not working |4.4.1 |a| |ii||1
Rear Exhaust has part of the system missing |7.1.1a|1
Stop lamp not working rear switch adjustment |4.3.1 |a| |ii||1
Drive chain excessively tight |6.2.1d|1
Service brake: efficiency below requirements |3.7.C.1a|1
Brake lever has inadequate reserve travel |9.3.1f|1
Rear Footrest missing |9.6.1|1
Stop lamp missing |1.2.1a|1
Rear reflector missing |1.5.1a|1
Hazard warning lamps not flashing in phase, with ignition on |1.4.B.1f|1
Hazard warning lamps not flashing in phase, with ignition off |1.4.B.1f|1
All position lamps not working |1.1.A.3b|1
Horn not working |1.7.3a|1
Front wheel spindle securing nut locking device missing |2.3.3a|1
Clutch lever positioned so it cannot be readily operated. does not disengage drive |6.2.1g|1
Front wheel spindle loose |2.3.3a|1
Nearside Front shock absorber seal failed and leaking oil |2.3.3|1
Offside Front shock absorber seal failed and leaking oil |2.3.3|1
Rear wheel bearings have excessive free play |2.4.A.2c|1
Floor brake test indicates a binding brake |3.3.C2c|1
Horn emits 2 or more alternating tones |1.7.3b|1
Horn is not a constant note |1.7.3c|1
Horn is not continous or uniform |1.7.3c|1
Exhaust mounting does not fully support the exhaust system |7.1.1.c|1
Exhaust is leaking and excessively noisey |7.1.1b|1
Throttle operating incorrectly |6.2.1f|1
Front Brake lever has inadequate reserve travel |3.1.3b|1
Steering headbearing has excessive free play |2.2.2|1
Rear suspension bush has excessive free play |2.4.A2a|i||1
Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c|1
Front wheel spindle securing nut locking device missing |2.3.5a|1
Steering movement excessively `notchy` with the wheel raised |2.2.1b|1
Headlamp dipped beam affected by the operation of another lamp |1.2.2c|1
Headlamp main beam affected by the operation of another lamp |1.2.2c|1
Dipswitch does not operate immediately when selected on main beam |4.1.3 |b||1
Drive chain worn to excess |6.2.1e|1
Rear Brake excessively binding |1.2.1 |f||1
Nearside Rear Direction indicator obviously incorrectly positioned |4.4.3 |a||1
Fuel system component leaking |6.1.3 |b| |i||1
Nearside Handlebar grip missing |2.2.1 |d| |i||1
Headlamp aim beam image kick up to the offside |1.6|1
Fuel system component leaking |7.2.1a|1
Offside Front Stop lamp switch with a delay in operation |4.3.2 |a| |ii||1
Rear Shock absorber has a serious fluid leak |5.3.2 |b||1
Rear Shock absorber has negligible damping effect |5.3.2 |b||1
Horn sound not in accordance with requirements |7.7 |c||1
Headlamp reflector seriously defective no dip patttern |4.1.1 |b| |ii||1
Registration plate lamp issues1
Rear reflector missing |4.8.2 |a| |ii||1
Fuel system component leaking fuel tap |6.1.3 |b| |i||1
Drive chain horseshoe locking device likely to become detached |6.1.7 |j| |ii||1
Rear Wheel excessively distorted |5.2.2 |c| |i||1
Front Brake disc insecure mounting plate corroded |1.1.14 |a| |ii||1
Wheel alignment incorrect which adversely affects the handling out but rear wheel so out of true unable to get accurate measurments |2.4 |a||1
Headlamp aim not tested |4.1.2 |b||1
All position lamps not working |4.2.1 |a||1
All direction indicators not working |4.4.1 |a| |ii||1
Rear Rear reflector missing |4.8.2 |a| |ii||1
Front Brake lever has insufficient reserve travel |1.1.2 |a||1
Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i||1
Front Brake effort inadequate at a wheel |1.2.1 |a| |i||1
Front Brake component insecure brake dis lock tabs not locked in place |1.1.21 |c||1
Headlamp at least one does not illuminate on dipped beam (1.2.2a(i))1
Nearside Front Hydraulic brake cylinder leaking hydraulic fluid (1.1.16 (b) (i))1
Brake lever has insufficient reserve travel (1.1.2 (a))1
Battery insecure and likely to fall from carrier (4.13 (a) (ii))1
Stop lamp not working (4.3.1 (a) (ii))1
Horn sound not in accordance with requirements operation affected by indicators (7.7 (c))1
Front Wheel spoke excessively loose (5.2.2 (d))1
Chain guard insecure (6.1.7 (i))1
Headlamp not working on dipped beam (4.1.1 (a) (ii))1
Steering headbearing excessively stiff or notchy (2.2.2 (f) (i))1
Throttle operating incorrectly sticking (6.2.7 (a) (i))1
Wheel spindle loose Loose in bottom of fork (5.2.1 (c) (i))1
Rear reflector missing (4.8.2 (a) (ii))1
Horn not working (7.7 (a) (ii))1
Front Brake lever insecure (1.1.2 (e) (i))1
Rear Rear reflector missing (4.8.2 (a) (ii))1
Throttle operating incorrectly (6.2.7 (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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