| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 30 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 24 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 17 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 16 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 13 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 13 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 11 |
| Drive chain excessively loose |6.2.1d| | 10 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Registration plate issues | 10 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Horn not working |1.7.3a| | 7 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 7 |
| Offside Front Direction indicator not working |1.5.1c| | 6 |
| Rear Brake disc|s| cracked |3.2.A1g| | 6 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 6 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 5 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 4 |
| Nearside Front Footrest insecure |6.2.1a| | 4 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Rear Brake excessively binding (1.2.1 (f)) | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Offside Front Footrest insecure |6.2.1a| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Nearside Front Direction indicator not working |1.5.1c| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Nearside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Rear suspension component cracked |2.4.A.1a| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Offside Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Floor brake test indicates a severely grabbing brake |3.3.C2d| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Nearside Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Position lamp not working 2x fuses i x bulb |4.2.1 |a|| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Rear Brake component is excessively corroded |3.1.5| | 1 |
| Nearside Fuel hose leaking |7.2.1a| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Offside Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Front Brake hose leaking fluid |3.2.B4| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear suspension component seized |2.4A2a|ii|| | 1 |
| Offside Handlebar deformed |2.1.1b| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Offside Front Lower Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Nearside Front Fuel hose leaking |7.2.1a| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Drive chain excessively tight seized links |6.2.1d| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Wheel spoke cracked. |4.2.1b| | 1 |
| Sidecar front position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Sidecar wheel alignment has excessive toe-out |5.3.1a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Rear position lamp insecure |1.1.1c| | 1 |
| Nearside Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Rear Brake pipe union leaking fluid |3.2.B4| | 1 |
| Offside Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Nearside Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Offside Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Rear Inner Suspension arm pin or bush excessively worn Swing arm to linkage |5.3.4 |a| |i|| | 1 |
| Stop lamp does not illuminate immediately a brake applies rear brake |1.3.1a| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Chain guard insecure |6.2.1c| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Offside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Front Position lamp switch insecure |1.1.4b| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Nearside Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Nearside Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Offside Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Offside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Nearside Front Direction indicator missing |1.5.1a| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 1 |
| Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Drive chain excessively tight Tight spot in chain |6.2.1d| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Shock absorber has negligible damping effect Siezed (5.3.2 (b)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Nearside Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Nearside Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Wheel more than one fixing missing (5.2.1 (a) (ii)) | 1 |
| Handlebar fouling on the fuel tank or bodywork on full lock lock stop replaced (2.1.4 (b)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Brake caliper insecure (1.1.16 (c) (i)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Nearside Front Lower Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Lower Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Rear Lower Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Central Rear Upper Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Rear Stop lamp not working stop lamp inoperative when rear brake applied (4.3.1 (a) (ii)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Rear Brake grabbing severely (1.2.1 (c)) | 1 |
| Rear Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Central Exhaust has a major leak of exhaust gases n/s (6.1.2 (a)) | 1 |
| Nearside Footrest insecure (6.2.12 (a)) | 1 |