| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 38 |
| Drive chain excessively loose |6.2.1d| | 20 |
| Rear reflector on motorcycle missing |1.4.1| | 16 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 11 |
| Rear reflector on motorcycle obscured |1.4.1| | 10 |
| Drive chain worn to excess |6.2.1e| | 10 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 9 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 8 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 8 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Steering headbearing has excessive free play |2.2.2| | 7 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 6 |
| Rear Wheel spoke excessively loose |4.2.1b| | 6 |
| Rear mono-shock pivot seized |2.4.B.4| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Handlebar deformed |2.1.1b| | 5 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Registration plate issues | 4 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 4 |
| Rear Drive chain excessively loose |6.2.1d| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Rear suspension component seized |2.4A2a|ii|| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Rear Brake back plate|s| insecure |3.2.A1j| | 3 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 3 |
| Direction indicator not working |1.5.1c| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 3 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 3 |
| Nearside Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 2 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| An item not tested |Manual| | 2 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Front Front mudguard insecure |2.3.7| | 2 |
| Rear mono-shock insecure |2.4.B.4| | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 2 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 2 |
| Offside Rear Direction indicator insecure |1.5.3b| | 2 |
| Rear Brake locking device missing |3.2.A1e| | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Brake component insecure Rear break locking devices missing (1.1.21 (c)) | 1 |
| Offside Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Front shock absorber seal failed and leaking oil both |2.3.3| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Motorcycle structure joining/attachment plate or fastening insecure pin missing in brake torque anchor plate |6.1.1 |b| |i|| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Footrest missing rear footrests missing[double seat fitted] |6.2.1a| | 1 |
| Front Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front suspension assembly component excessively bent |2.3.1| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Nearside Footrest missing |6.2.1a| | 1 |
| Offside Footrest missing |6.2.1a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Position lamp switch faulty |1.1.4a| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Footrest missing Both rear (6.2.12 (a)) | 1 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Rear Plate brake test indicates a sticking brake |3.3.B1a| | 1 |
| Rear Wheel spindle locking device missing (5.2.1 (d)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected Cable routing (6.2.7 (a) (ii)) | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Fuel cap mounting flange/sealing method defective |7.2.2c| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Front Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Rear Motorcycle structure joining/attachment plate or fastening insecure (6.1.1 (b) (i)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Brake component insecure (1.1.21 (c)) | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Drive chain sprocket so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Wheel spoke excessively loose |4.2.1b| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Rear Direction indicator insecure |1.5.3b| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Nearside Front Steering lock stop ineffective |2.1.3| | 1 |
| Offside Front Steering lock stop ineffective |2.1.3| | 1 |
| Rear Brake back plate|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Rear Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Offside Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Nearside Front Shock absorber has a serious fluid leak fork seals (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has a serious fluid leak fork seal (5.3.2 (b)) | 1 |
| Stop lamp switch with a delay in operation front brake lever sticking (4.3.2 (a) (ii)) | 1 |
| Front Brake disc contaminated with fork oil (1.1.14 (b)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Stop lamp not working when front brake applied (4.3.1 (a) (ii)) | 1 |
| Fuel system component leaking around carb area (6.1.3 (b) (i)) | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Motorcycle structure is fractured and structural rigidity is significantly reduced front guard (6.1.1 (a) (i)) | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Front Chain guard insecure |6.2.1c| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Front Shock absorber has a serious fluid leak both forks (5.3.2 (b)) | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Headlamp lens seriously defective no dip , incorrect beam (4.1.1 (b) (ii)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Rear Stop lamp missing |1.3.3a| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Footrest insecure |6.2.1a| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Offside Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Brake linkage has abnormal movement due to excessive wear |3.2.A1i| | 1 |
| Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Front Brake lever mounting insecure |3.1.2a| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Stop lamp does not illuminate immediately a brake applies rear pedal |1.3.1a| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| 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| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Exhaust mounting does not fully support the exhaust system heat shield insecure |7.1.1.c| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Offside Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Nearside Front Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Offside Front Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls front stop switch missing (4.3.2 (a) (iii)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Centre Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |