| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 45 |
| Registration plate lamp issues | 28 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Drive chain excessively loose |6.2.1d| | 14 |
| Rear Brake excessively binding (1.2.1 (f)) | 14 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 13 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 13 |
| Registration plate issues | 11 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 11 |
| Drive chain worn to excess |6.2.1e| | 11 |
| Stop lamp remains on when the brakes are released | 10 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 10 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 9 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 8 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 8 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 8 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 8 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 8 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 8 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 8 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Throttle operating incorrectly |6.2.1f| | 7 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 7 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 7 |
| Front Brake excessively binding (1.2.1 (f)) | 7 |
| Stop lamp remains on when the brake is released |1.3.1e| | 7 |
| Horn not working |1.7.3a| | 7 |
| Rear Brake excessively binding |1.2.1 |f|| | 7 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 6 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 6 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 6 |
| Rear Position lamp not working (4.2.1 (a)) | 6 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 5 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 5 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 5 |
| Drive chain excessively tight |6.2.1d| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Offside Rear Footrest missing (6.2.12 (a)) | 4 |
| Riders seat insecure (6.2.5 (a) (ii)) | 4 |
| Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 4 |
| Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 4 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 4 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Rear Position lamp not working |4.2.1 |a|| | 4 |
| Horn not working (7.7 (a) (ii)) | 4 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 4 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Nearside Front Direction indicator likely to become detached (4.4.1 (c) (ii)) | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 3 |
| Headlamp insecure (4.1.1 (c)) | 3 |
| Nearside Rear Footrest missing |6.2.12 |a|| | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 3 |
| Rear position lamp incorrect colour |1.1.2b| | 3 |
| Rear Stop lamp emits other than a steady red light |1.3.1b| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 3 |
| Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 3 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 3 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 3 |
| Stop lamp does not illuminate immediately a brake applies rear brake |1.3.1a| | 2 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Indicator switch insecure |1.5.4| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 2 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Nearside Handlebar deformed |2.1.1b| | 2 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 2 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 2 |
| Front Stop lamp emits other than a steady red light |1.3.1b| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Rear Stop lamp emits other than a steady red light (4.3.3 (a) (ii)) | 2 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 2 |
| Riders seat insecure |6.2.5 |a| |ii|| | 2 |
| Rear Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 2 |
| Offside Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 2 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 2 |
| Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Handlebar deformed to the extent that steering is affected (2.2.1 (c) (ii)) | 2 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 2 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 2 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 2 |
| 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)) | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 2 |
| Front Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 2 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking r/h switch insecure and could jam front brake lever travel |6.1.1c| | 2 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Rear Brake caliper insecurely mounted and braking performance affected (1.1.16 (c) (ii)) | 2 |
| All direction indicators not working |4.4.1 |a| |ii|| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Horn not working (7.7 (a)) | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 2 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 2 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 2 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 2 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 2 |
| Offside Front Direction indicator likely to become detached (4.4.1 (c) (ii)) | 2 |