| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 20 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 8 |
| Horn not working |1.7.3a| | 6 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Registration plate issues | 5 |
| Front suspension has inadequate damping effect. |2.3.6c| | 5 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Riders seat insecure |6.2.1a| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Brake hose excessively deteriorated | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Headlamp switch faulty |1.2.4| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Fuel system component insecure |7.2.1b| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Front mudguard insecure |2.3.7| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Indicator tell tale not functioning |1.5.2| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Centre Front Indicator tell tale not functioning |1.5.2| | 1 |
| Nearside Front Direction indicator missing |1.5.1a| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Offside Rear Direction indicator missing |1.5.1a| | 1 |
| Offside Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Offside Front Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Outer Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Brake master cylinder leaking |1.1.10 |b| |ii|| | 1 |
| Nearside Steering linkage locking device ineffective |2.1.3 |d|| | 1 |
| Offside Steering linkage locking device ineffective |2.1.3 |d|| | 1 |
| Steering lock stop ineffective |2.1.3| | 1 |
| Rear Brake linkage clevis joint excessively worn |3.2.A1d| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Rear Wheel fixing loose |single fixing| |5.2.1 |a| |ii|| | 1 |
| Front Brake fluid reservoir fluid level significantly below minimum level |1.1.10 |d| |ii|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak fork |5.3.2 |b|| | 1 |
| Nearside Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear Rear suspension component excessively corroded. |2.4.A.1a| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear Brake performance not tested |3.3| | 1 |
| Headlamp missing |1.2.3a| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Front Brake disc|s| securing bolt|s| missing locking devise |3.2.A1g| | 1 |
| Rear Brake hose leaking fluid |3.2.B4| | 1 |
| Brake performance not tested |3.3| | 1 |
| Exhaust silencer likely to become detached (8.1.1 (b) (ii)) | 1 |
| Brake hose is likely to be fouled or trapped by moving parts Back |3.2.B2c| | 1 |
| Brake hose fouling Back |3.2.B3b| | 1 |
| Wheel alignment incorrect which adversely affects the steering Back wheel out of alignment |2.5.1| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Front wheel spindle securing nut locking device insecure |2.3.3a| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Fuel system component insecure |7.2.1b| | 1 |
| Nearside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Brake master cylinder severely corroded |3.2.B1b| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride split pin missing rear wheel |6.2.1h| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Throttle operating incorrectly excessive free play |6.2.7 |a| |i|| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Offside Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Brake hose fouling |3.2.B3b| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Seat insecure |6.2.1a| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Offside Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Offside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Nearside Front Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Headlamp aim not tested lights not working |1.6| | 1 |
| Rear Brake performance not tested brake not working |3.3| | 1 |
| Rear Brake locking device missing torque arm bolt |3.2.A1e| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front Front wheel spindle loose spindle cap |2.3.5a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling wheel |2.5.1| | 1 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |