| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 52 |
| Registration plate issues | 26 |
| Rear reflector on motorcycle missing |1.4.1| | 25 |
| Rear reflector missing (4.8.2 (a) (ii)) | 9 |
| Horn not working |1.7.3a| | 7 |
| Drive chain excessively loose |6.2.1d| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Drive chain excessively tight |6.2.1d| | 5 |
| Registration plate lamp issues | 5 |
| Throttle operating incorrectly |6.2.1f| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Offside Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| 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| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls brake switch (4.3.2 (a) (iii)) | 1 |
| Central Rear Lower Suspension arm pin or bush excessively worn shock/swingarm linkage excessive play (5.3.4 (a) (i)) | 1 |
| Central Rear Suspension arm pin or bush excessively worn swingarm mounting has excessive play (5.3.4 (a) (i)) | 1 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Offside Rear Upper Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Rear Footrest insecure split pin missing |6.2.1a| | 1 |
| Handlebar fouling on the fuel tank or bodywork on full lock HITTING FAIRING BOTH SIDES (2.1.4 (b)) | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Offside Front Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Front Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Offside Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Headlamp light intensity severely reduced (4.1.4 (a)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Headlamp not working on dipped beam bulb blown (4.1.1 (a) (ii)) | 1 |
| Front Brake master cylinder insecure (1.1.10 (c)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Offside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 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 Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Centre Front Horn not working |1.7.3a| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock |2.1.4 |b|| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Brake hose damaged | 1 |
| Offside Front Upper Throttle operating incorrectly |6.2.1f| | 1 |
| Offside Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Throttle operating incorrectly Throttle tube tight to bar. (6.2.7 (a) (i)) | 1 |
| Rear Brake component inadequately mounted caliper carrier not located correctly (1.1.21 (c)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Nearside Front Position lamp missing (4.2.1 (a)) | 1 |
| Offside Front Position lamp missing (4.2.1 (a)) | 1 |
| Brake component has an inadequate repair |3.1.5| | 1 |
| Rear Stop lamp not working brake control 1 on rear stop lamp |4.3.1 |a| |ii|| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Rear Shock absorber likely to become detached (5.3.2 (a) (ii)) | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Nearside Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Inner Position lamp not working (4.2.1 (a)) | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |