| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 485 |
| Headlamp aim out of alignment | 311 |
| Registration plate issues | 285 |
| Horn not working |1.7.3a| | 131 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 127 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 127 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 98 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 96 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 93 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 89 |
| Riders seat insecure |6.2.1a| | 86 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 86 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 85 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 77 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 67 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 66 |
| Drive chain excessively tight |6.2.1d| | 66 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 55 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 55 |
| Drive chain excessively loose |6.2.1d| | 51 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 50 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 47 |
| 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| | 42 |
| Rear reflector missing (4.8.2 (a) (ii)) | 42 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 38 |
| Nearside Front Direction indicator not working |1.5.1c| | 36 |
| Offside Front Footrest insecure |6.2.1a| | 36 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 34 |
| Offside Front Direction indicator not working |1.5.1c| | 32 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 31 |
| Steering headbearing has excessive free play |2.2.2| | 30 |
| Drive chain worn to excess |6.2.1e| | 29 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 29 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 28 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 28 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 28 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 27 |
| Nearside Rear Direction indicator not working |1.5.1c| | 27 |
| Headlamp aim beam image kick up to the offside |1.6| | 24 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 24 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 24 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 23 |
| Offside Front Direction indicators not working |1.5.1c| | 23 |
| Nearside Rear Direction indicators not working |1.5.1c| | 21 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 19 |
| Front Brake excessively binding (1.2.1 (f)) | 18 |
| Stop lamp remains on when the brake is released |1.3.1e| | 18 |
| Front position lamp incorrect colour |1.1.2a| | 18 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 18 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 18 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 18 |
| Front Horn not working |1.7.3a| | 16 |
| Offside Rear Direction indicator not working |1.5.1c| | 16 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 16 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 16 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 15 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 15 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 15 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 14 |
| Throttle operating incorrectly |6.2.1f| | 14 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 14 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 14 |
| Front wheel bearings have excessive free play |2.3.5b| | 13 |
| Headlamp insecure |1.2.3b| | 13 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 13 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 13 |
| Nearside Front Direction indicators not working |1.5.1c| | 13 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 13 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 13 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 13 |
| Nearside Front Footrest insecure |6.2.1a| | 12 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 12 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 12 |
| Offside Rear Direction indicators not working |1.5.1c| | 12 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 11 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 11 |
| Front wheel bearings are excessively rough |2.3.5b| | 11 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 11 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 11 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 11 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 11 |
| Horn not working (7.7 (a)) | 10 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 10 |
| Registration plate lamp issues | 10 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 10 |
| Rear reflector missing |4.8.2 |a| |ii|| | 10 |
| Offside Footrest insecure |6.2.1a| | 10 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 10 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 10 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 10 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 10 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 10 |
| Rear 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| | 9 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 9 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 9 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 9 |
| Offside Front Brake disc|s| has excessive run out |3.2.A1m| | 9 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 9 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 9 |
| Rear Exhaust markings indicating not for road use or similar wording |7.1.4| | 9 |
| Brake lever has inadequate reserve travel |3.1.3b| | 9 |
| Front Riders seat insecure |6.2.1a| | 9 |
| Horn not working (7.7 (a) (ii)) | 9 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 9 |
| Front Steering headbearing has excessive free play |2.2.2| | 9 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 9 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 9 |
| Nearside Steering lock stop ineffective |2.1.3| | 9 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 9 |
| An item not tested |Manual| | 9 |