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MOT History from tests of petrol YAMAHA UNKNOWNs year 1978

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:82.49%
(The average a petrol YAMAHA UNKNOWN year 1978 passes without issue)
Based on:177 MOT Tests
Most common failuresNo# failures
Headlamp aim out of alignment10
Rear Roller brake test indicates a binding brake |3.3.A1a|3
Steering headbearing has excessive free play |2.2.2|2
Registration plate issues2
Handlebar handgrip not secure to handlebars. |2.1.1c|1
Front Brake pipe inadequately supported |3.2.B2b|1
Horn not working |1.7.3a|1
Stop lamp does not illuminate immediately a brake applies |1.3.1a|1
Fuel tank leaking |7.2.1a|1
Headlamp at least one does not illuminate on dipped beam |1.2.2a|i||1
Headlamp at least one does not illuminate on main beam |1.2.2a|ii||1
Roller brake test indicates a binding brake front |3.3.A1a|1
Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a|1
Rear Gradient brake test indicates a sticking brake |3.3.D1c|1
Direction indicators flashing less than 60 times a minute |1.5.1c|1
Front Brake disc|s| securing bolt|s| loose |3.2.A1g|1
Rear Brake disc|s| securing bolt|s| loose |3.2.A1g|1
Front Brake reaction bracket securing bolt|s| loose |3.2.A1j|1
Horn not loud enough to be heard by another road user |1.7.3a|1
Offside Rear Brake pedal has inadequate reserve travel |3.1.3b|1
Rear suspension component loose |2.4.A.1a|1
Rear reflector on motorcycle missing |1.4.1|1
Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride Locking tabs on disc |6.2.1h|1
Headlamp aim beam image kick up to the offside |1.6|1
Rear mono-shock insecure |2.4.B.4|1
Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k|1
Handlebar mounting clamp loose |2.1.1a|1
Horn not working |7.7 |a| |ii||1
Stop lamp not working |4.3.1 |a| |ii||1
All direction indicators light intensity significantly reduced |4.4.3 |a||1
Headlamp aim not tested |4.1.2 |b||1
Headlamp not working on dipped beam |4.1.1 |a| |ii||1
Headlamp not working on main beam |4.1.1 |a| |ii||1
Front Position lamp not working |4.2.1 |a||1
Rear Brake rod insecure |1.1.15 |c||1
Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i||1
Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i||1
Front Headlamp light intensity severely reduced |4.1.4 |a||1
Offside Rear Suspension rod attachment bracket/mounting insecure |5.3.3 |a| |i||1
Front Brake disc insecure |1.1.14 |a| |ii||1
Rear Brake excessively binding |1.2.1 |f||1
Horn not working (7.7 (a) (ii))1
Rear Stop lamp remains on when the brake is released |1.3.1e|1
Drive chain excessively loose (6.1.7 (c) (i))1
Riders seat insecure (6.2.5 (a) (ii))1
Front Fuel pipe insecure (6.1.3 (a) (i))1
Rear reflector missing (4.8.2 (a) (ii))1
Headlamp not working on main beam (4.1.1 (a) (ii))1
Rear Brake grabbing severely (1.2.1 (c))1
Front Brake effort inadequate at a wheel (1.2.1 (a) (i))1
Stop lamp remains on when the brakes are released1
Fuel tank so insecure there is a risk of fire (6.1.3 (a) (ii))1
Fuel tank leaking excessively or a risk of fire (6.1.3 (b) (ii))1
Front Shock absorber has a serious fluid leak both (5.3.2 (b))1
Front Shock absorber has negligible damping effect (5.3.2 (b))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
Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a))1
Headlamp aim projected beam image obviously incorrect (4.1.2 (c))1
Offside Front Brake disc contaminated (1.1.14 (b))1
Engine mounting/bracket missing lower bolt (6.1.8 (a) (ii))1
Front Wheel spindle locking device missing (5.2.1 (d))1
Rear Wheel spindle locking device missing (5.2.1 (d))1
Horn not working missing (7.7 (a))1
Headlamp lens seriously defective (4.1.1 (b) (ii))1
Headlamp lens seriously defective incorrect light units fitted (4.1.1 (b) (ii))1
Rear Brake component insecure brake say nut loose (1.1.21 (c))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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