| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 48 |
| Rear reflector on motorcycle missing |1.4.1| | 13 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Drive chain excessively loose |6.2.1d| | 10 |
| Drive chain worn to excess |6.2.1e| | 7 |
| Horn not working |1.7.3a| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 2 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Registration plate issues | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear reflector on motorcycle obscured |1.4.1| | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front Headlamp aim so that beam "kick up" is not visible on the screen headlight incorrect patterns |4.1.2 |a|| | 1 |
| Steering headbearing has excessive free play headstock nut loose |2.2.2| | 1 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Rear An item not tested |Manual| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Front Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Centre Front Horn not working |1.7.3a| | 1 |
| Centre Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Offside Handlebar deformed |2.1.1b| | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Exhaust system insecure (6.1.2 (a)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Nearside Inner Motorcycle structure cracked |6.1.1a| | 1 |
| Steering lock stop ineffective |2.1.3| | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| All direction indicators light intensity significantly reduced indicators work intermittently and lose intensity when engine rpm rises (4.4.3 (a)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Centre Front Motorcycle structure excessively corroded frame |6.1.1a| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Offside Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Rear Brake lever pivot excessively tight |1.1.1 |a|| | 1 |
| Stop lamp not working FRONT |4.3.1 |a| |ii|| | 1 |
| Offside Front Suspension arm attachment bracket/mounting fractured |5.3.3 |b| |ii|| | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Offside Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Throttle operating incorrectly does not return immediately |6.2.1f| | 1 |
| Handlebar handgrip not secure to handlebars. left hand grip insecure |2.1.1c| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Fuel cap mounting flange/sealing method defective excessive paint on seal |7.2.2c| | 1 |
| Horn missing |1.7.1| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Front Headlamp aim projected beam image obviously incorrect LED bulb fitted to halogen lens. (4.1.2 (c)) | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Exhaust system insecure Silencer and link pipe loose (6.1.2 (a)) | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Front Wheel bearing play so excessive that directional control is impaired (5.1.3 (a) (ii)) | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Front Brake disc contaminated oil (1.1.14 (b)) | 1 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Offside Rear suspension component loose |2.4.A.1a| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Front Brake hose fouling |3.2.B3b| | 1 |
| Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Front An item not tested |Manual| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Nearside Front Footrest insecure lock clip missing (6.2.12 (a)) | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 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 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Stop lamp not working From front control (4.3.1 (a) (ii)) | 1 |
| Centre Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Offside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Steering headbearing excessively stiff or notchy stiff and notchy (2.2.2 (f) (i)) | 1 |
| Front Position lamp missing (4.2.1 (a)) | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Central Front Horn control defective |1.7.2a| | 1 |