| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 30 |
| Rear reflector on motorcycle missing |1.4.1| | 22 |
| Registration plate issues | 17 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 11 |
| Drive chain worn to excess |6.2.1e| | 11 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 8 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Front wheel bearings have excessive free play |2.3.5b| | 7 |
| Drive chain excessively loose |6.2.1d| | 7 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 7 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 7 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 7 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 7 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 7 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 6 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 6 |
| Steering headbearing has excessive free play |2.2.2| | 6 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 6 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 5 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 4 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 4 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 3 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Rear Wheel corroded significantly reducing the original strength |4.2.1a| | 3 |
| Rear Footrest missing |6.2.1a| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Direction indicator not working |1.5.1c| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Nearside Front Direction indicator missing |1.5.1a| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Rear Wheel spoke excessively loose |4.2.1b| | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Rear Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Brake rod excessively damaged |3.2.A1c| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Fuel tank leaking |7.2.1a| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Horn control defective |1.7.2a| | 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 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Rear Brake pedal attachment screws missing. |3.1.2b| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Position lamp switch insecure |1.1.4b| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Horn not working |1.7.3a| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Front Front suspension assembly component cracked |2.3.1| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Nearside Rear Stop lamp insecure |1.3.3b| | 1 |
| Front Front suspension assembly component excessively bent |2.3.1| | 1 |
| Nearside Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Lower Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Upper Front position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Front Lower Front position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Front Lower Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Front Position lamp switch insecure |1.1.4b| | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Headlamp aim not tested |4.1.2 |b|| | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Front position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Offside Rear Direction indicator missing |1.5.1a| | 1 |
| Front Lower Brake reaction bracket insecure hose clamp insecure |3.2.A1j| | 1 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front Direction indicators flashing more than 120 times per minute stays on |1.5.1c| | 1 |
| Offside Rear Direction indicators flashing less than 60 times a minute stays on |1.5.1c| | 1 |
| Central Front Motorcycle structure cracked |6.1.1a| | 1 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Position lamp adversely affected by the operation of another lamp (4.2.3 (b)) | 1 |
| Stop lamp adversely affected by the operation of another lamp by Indicators. (4.3.3 (b)) | 1 |
| Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Front Indicator tell tale not functioning |1.5.2| | 1 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Drive chain excessively loose and very dry |6.2.1d| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Front Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Lower Front suspension assembly component cracked |2.3.1| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Footrest insecure |6.2.1a| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Brake fluid reservoir cap missing |3.2.B1c| | 1 |
| Front Brake component damaged and seriously reduced in strength |3.2.A1| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride Split link |6.2.1h| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Rear reflector on motorcycle insecure |1.4.2c| | 1 |
| Plate brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.B2b| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Offside Footrest missing |6.2.1a| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Position lamp switch does not operate the front and rear position lamps |1.1.4c| | 1 |
| Rear Direction indicator obscured |1.5.1a| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| All direction indicators adversely affected by the operation of another lamp (4.4.3 (b)) | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Wheel bearing play so excessive that directional control is impaired (5.1.3 (a) (ii)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Nearside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Central Front Wheel bearing play so excessive that directional control is impaired excessive play on front wheel bearings |5.1.3 |a| |ii|| | 1 |
| Central Rear Wheel bearing has excessive play rear wheel bearings excessive play |5.1.3 |a| |i|| | 1 |
| Central Rear Stop lamp not working front brake light not working |4.3.1 |a| |ii|| | 1 |
| Central Front Steering headbearing in such a condition that steering control is adversely affected excessive play in headstock bearings |2.2.2 |f| |ii|| | 1 |
| Offside Front Brake clevis joint insecure (1.1.15 (c)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Chain guard insecure inner mounting broken (6.1.7 (i)) | 1 |
| Offside Front Brake cylinder has no reserve travel and braking performance affected (1.1.16 (e) (ii)) | 1 |
| Rear Shock absorber likely to become detached (5.3.2 (a) (ii)) | 1 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |