| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 39 |
| Drive chain excessively loose |6.2.1d| | 19 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 19 |
| Rear reflector on motorcycle obscured |1.4.1| | 11 |
| Rear reflector on motorcycle missing |1.4.1| | 11 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 9 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 8 |
| Registration plate issues | 7 |
| Riders seat insecure |6.2.1a| | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 5 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 4 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 4 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 4 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 4 |
| Handlebar deformed |2.1.1b| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 3 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Rear position lamp incorrect colour |1.1.2b| | 2 |
| Front Brake excessively binding |1.2.1 |f|| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Rear Decelerometer brake test indicates a sticking brake |3.3.E1d| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Front Brake hose excessively stretched (1.1.12 (b) (ii)) | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Horn not working (7.7 (a)) | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Registration plate lamp issues | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Brake pedal is inoperative |3.1.3c| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Front Footrest missing non slip rubber |6.2.1a| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride brake torque rod end |6.2.1h| | 1 |
| Motorcycle structure excessively damaged sidestand |6.1.1a| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front Stop lamp switch with a delay in operation |4.3.2 |a| |ii|| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Centre Front Lower Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride Drive chain missing clip on split link
|6.2.1h| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Horn not working |1.7.3a| | 1 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Nearside Front Position lamp switch insecure |1.1.4b| | 1 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Nearside Drive chain worn to excess |6.2.1e| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear Floor brake test indicates a severely grabbing brake |3.3.C2d| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Throttle operating incorrectly sticking |6.2.1f| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Direction indicator lens defective such that the emitted light is adversely affected lense missing |4.4.1 |b| |ii|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| All position lamps not working |4.2.1 |a|| | 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 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Fuel system component leaking |6.1.3 |b| |i|| | 1 |
| Offside Front Brake hose fouling flexi-pipe rubbing on shocker on lock |3.2.B3b| | 1 |
| Throttle operating incorrectly twist not returning |6.2.1f| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Front An item not tested |Manual| | 1 |
| Rear Front mudguard insecure |2.3.7| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 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 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Rear Brake excessively binding rear brake arm |1.2.1 |f|| | 1 |
| Nearside Rear Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Rear Stop lamp not working rear brake light switch not working |4.3.1 |a| |ii|| | 1 |
| Offside Rear Brake lever excessively corroded rear brake lever sticking on |3.2.A1c| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Decelerometer brake test indicates a binding brake |3.3.E1d| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride brake plate locking pin missing |6.2.1h| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Brake linkage excessively corroded |3.2.A1c| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear Lower Brake locking device missing |3.2.A1e| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Exhaust excessively deteriorated |7.1.1a| | 1 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Front Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Offside Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Brake component insecure Reaction arm bolt split pin missing (1.1.21 (c)) | 1 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Exhaust has a major leak of exhaust gases Front cylinder exhaust pipe rotted through at cylinder head causing major leak of exhaust gasses. (6.1.2 (a)) | 1 |
| Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Rear Drive chain sprocket excessively loose nuts (6.1.7 (c) (i)) | 1 |
| Brake rod insecure rear tie rod nut missing (1.1.15 (c)) | 1 |
| Roller brake test brake efficiency less than 27.5% overall (1.2.2 (a) (ii)) | 1 |
| Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Rear Pillion seat insecure (6.2.6 (a) (ii)) | 1 |
| Rear Suspension arm pin or bush excessively worn swing arm (5.3.4 (a) (i)) | 1 |
| Exhaust has a major leak of exhaust gases Front down-pipe fractured (6.1.2 (a)) | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Throttle operating incorrectly throttle sticking on (6.2.7 (a) (i)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Road spring corroded so that its cross sectional area is reduced and seriously weakened (5.3.1 (b) (i)) | 1 |
| Exhaust system insecure (6.1.2 (a)) | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear Brake lever has abnormal movement of levers indicating excessive wear or maladjustment Rear brake actuating lever loose on splined shaft, Corrected at station. (1.1.15 (f)) | 1 |
| Brake rod has restricted free movement (1.1.15 (e)) | 1 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Handlebar so insecure it is likely to become detached (2.2.1 (b) (ii)) | 1 |
| Steering headbearing in such a condition that steering control is adversely affected (2.2.2 (f) (ii)) | 1 |
| Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Brake lagging in operation (1.2.1 (d)) | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Brake linkage has abnormal movement of levers indicating excessive wear or maladjustment rear brake arm loose (1.1.15 (f)) | 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 |
| Front Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Rear Brake fluid reservoir fluid not visible (1.1.10 (d) (iii)) | 1 |
| Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front Outer Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |