| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 91 |
| Drive chain excessively loose |6.2.1d| | 44 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 38 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 32 |
| Registration plate issues | 32 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 26 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 25 |
| Headlamp insecure |1.2.3b| | 25 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 20 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 19 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 17 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 17 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 15 |
| Riders seat insecure |6.2.1a| | 14 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 13 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 13 |
| Drive chain worn to excess |6.2.1e| | 12 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 11 |
| Steering headbearing has excessive free play |2.2.2| | 11 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 10 |
| Horn not working |1.7.3a| | 10 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 10 |
| Front wheel bearings have excessive free play |2.3.5b| | 10 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 9 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 8 |
| Registration plate lamp issues | 8 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 8 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 8 |
| Stop lamp remains on when the brake is released |1.3.1e| | 8 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 6 |
| Front Steering headbearing has excessive free play |2.2.2| | 6 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 6 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 6 |
| Headlamp insecure (4.1.1 (c)) | 5 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 5 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 5 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 5 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 5 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Nearside Direction indicator not working |1.5.1c| | 5 |
| Offside Direction indicator not working |1.5.1c| | 5 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 5 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 4 |
| Rear Wheel damaged significantly reducing the original strength |4.2.1a| | 4 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 4 |
| Front position lamp insecure |1.1.1c| | 3 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 3 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 3 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Chain guard insecure |6.2.1c| | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 3 |
| Front Riders seat insecure |6.2.1a| | 3 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Drive chain fouling another component |6.2.1d| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Exhaust excessively deteriorated |7.1.1a| | 3 |
| Exhaust has part of the system missing |7.1.1a| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 3 |
| Headlamp aim not tested |1.6| | 3 |
| Rear Wheel spoke cracked. |4.2.1b| | 3 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Nearside Footrest insecure |6.2.1a| | 3 |
| Front Headlamp insecure |1.2.3b| | 3 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Front Front position lamp insecure |1.1.1c| | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Nearside Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Offside Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 2 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected |1.1.2 |b| |ii|| | 2 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Centre Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front Footrest insecure |6.2.1a| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Nearside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| An item not tested |Manual| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Rear Wheel spoke excessively loose |4.2.1b| | 2 |
| Nearside Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Nearside Indicator tell tale not functioning |1.5.2| | 2 |
| Offside Indicator tell tale not functioning |1.5.2| | 2 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| All direction indicators adversely affected by the operation of another lamp (4.4.3 (b)) | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Rear Footrest missing (6.2.12 (a)) | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |