| Most common failures | No# failures |
|---|
| Registration plate issues | 45 |
| Rear reflector on motorcycle missing |1.4.1| | 38 |
| Headlamp aim out of alignment | 15 |
| Horn not working |1.7.3a| | 12 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Horn missing |1.7.1| | 9 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 7 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Rear Wheel spoke excessively loose |4.2.1b| | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Rear reflector missing |4.8.2 |a| |ii|| | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Registration plate lamp issues | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Horn not working (7.7 (a)) | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| 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| | 3 |
| Front Wheel spoke excessively loose |4.2.1b| | 3 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Direction indicator missing |1.5.1a| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Brake lever mounting insecure |3.1.2a| | 1 |
| Centre Front Lower Horn not working |1.7.3a| | 1 |
| Centre Front Upper Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Rear Brake disc|s| cracked |3.2.A1g| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front shock absorber seal failed and leaking oil both sides |2.3.3| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Steering headbearing excessively stiff or notchy notchy (2.2.2 (f) (i)) | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Front Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Brake disc insecure (1.1.14 (a) (ii)) | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Horn not working (7.7 (a)) | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Stop lamp not working front brake (4.3.1 (a) (ii)) | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Centre Front Horn missing |1.7.1| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Rear Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Offside Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Exhaust markings indicating not for road use or similar wording (6.1.2 (c)) | 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 |
| Rear Wheel spoke excessively loose several - as chalked (5.2.2 (d)) | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Lower Rear suspension bearing has excessive free play linkage |2.4.A2a|i|| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Offside Rear Brake component modification adversely affecting braking performance brake pedal notchy excessive pressure required (1.1.21 (d) (ii)) | 1 |
| Central Rear Position lamp not working position lamp not working - brake light working (4.2.1 (a)) | 1 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Central Lower Suspension arm pin or bush excessively worn play in shock absorber linkage (5.3.4 (a) (i)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| Central Lower Suspension component pin or bush excessively worn lower suspension linkage attachment to frame excessive movement (5.3.4 (a) (i)) | 1 |
| Offside Front Stop lamp does not illuminate by the operation of both brake controls front brake light switch u/s (4.3.2 (a) (iii)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak front left fork seal leaking (5.3.2 (b)) | 1 |
| Centre Rear Upper Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Front Footrest insecure |6.2.12 |a|| | 1 |
| Front Steering damper in such a condition that the steering action is impaired. |2.1.2d| | 1 |
| Rear Stop lamp missing |1.3.3a| | 1 |
| Front Horn missing |1.7.1| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Front Wheel spoke excessively corroded |4.2.1b| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Nearside Rear Direction indicator not working when engine running |4.4.1 |a| |ii|| | 1 |
| Offside Rear Direction indicator not working when engine running |4.4.1 |a| |ii|| | 1 |
| Rear Direction indicator obviously incorrectly positioned too close together |4.4.3 |a|| | 1 |
| Throttle operating incorrectly revs increase on right turn |6.2.7 |a| |i|| | 1 |
| Rear Position lamp adversely affected by the operation of another lamp indicators |4.2.3 |b|| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies control |1.3.1a| | 1 |
| Throttle operating incorrectly throttle sticking |6.2.1f| | 1 |
| Offside Front Brake lever mounting insecure |3.1.2a| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear Brake caliper inadequately mounted and braking performance affected SLIDER PIN SIEZED (1.1.16 (c) (ii)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Direction indicators flashing more than 120 times per minute all |1.5.1c| | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Rear Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |