| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 30 |
| Horn not working |1.7.3a| | 25 |
| Registration plate issues | 18 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 14 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 14 |
| Steering headbearing has excessive free play |2.2.2| | 14 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 11 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 10 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 9 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 8 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 8 |
| Rear reflector on motorcycle missing |1.4.1| | 7 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 7 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 6 |
| Drive chain worn to excess |6.2.1e| | 6 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 6 |
| Brake locking device missing |3.2.A1e| | 6 |
| Direction indicators not working |1.5.1c| | 6 |
| Fuel system component leaking |7.2.1a| | 6 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Brake lever has inadequate reserve travel |3.1.3b| | 5 |
| Throttle operating incorrectly |6.2.1f| | 5 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Nearside Rear Direction indicators not working |1.5.1c| | 4 |
| Rear Brake locking device missing |3.2.A1e| | 4 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 4 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 4 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 4 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 4 |
| Direction indicator not working |1.5.1c| | 4 |
| Offside Rear Direction indicator not working |1.5.1c| | 4 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 4 |
| Fuel pipe leaking |7.2.1a| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Nearside Rear Footrest missing |6.2.1a| | 3 |
| Offside Rear Footrest missing |6.2.1a| | 3 |
| Nearside Front Direction indicator not working |1.5.1c| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 3 |
| Parking brake lever has no reserve travel |3.1.6b| | 3 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Headlamp switch faulty |1.2.4| | 3 |
| Rear position lamp incorrect colour |1.1.2b| | 3 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Fuel system component insecure |7.2.1b| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Front Wheel spoke excessively loose |4.2.1b| | 2 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Handlebar mounting clamp loose |2.1.1a| | 2 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 2 |
| Front Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 2 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Nearside Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Front Front suspension fouling which affects the movement of the front suspension. |2.3.6a| | 2 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 2 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Nearside Steering lock stop ineffective |2.1.3| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Brake hose excessively deteriorated | 2 |
| Front Steering lock stop ineffective |2.1.3| | 2 |
| Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 2 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Front suspension assembly component loose |2.3.1| | 2 |
| Exhaust has part of the system missing |7.1.1a| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 2 |
| Rear suspension bush has excessive free play swingarm |2.4.A2a|i|| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Horn missing |1.7.1| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear Direction indicators affected by the operation of another lamp both flashing at the same time |1.5.1c| | 1 |
| Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Rear suspension component seized |2.4A2a|ii|| | 1 |
| Nearside Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Centre Front Upper Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Centre Rear Upper Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Centre Front Upper Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Nearside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Nearside Front suspension has a fracture of a load bearing member or its supporting structure. |2.3.8| | 1 |
| Offside Front suspension has a fracture of a load bearing member or its supporting structure. |2.3.8| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Upper Direction indicator not working |1.5.1c| | 1 |
| Front Upper Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear Footrest insecure |6.2.1a| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Nearside Rear Shock absorber insecure |2.7.2b| | 1 |
| Offside Rear Brake pipe fouled by moving parts |3.6.B.2a| | 1 |
| Brake pipe inadequately supported |3.6.B.1| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Nearside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear Brake linkage clevis joint excessively worn |3.2.A1d| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Offside Front Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Drive chain excessively loose and dry |6.2.1d| | 1 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Position lamp switch faulty |1.1.4a| | 1 |
| Rear Rear suspension bush has excessive free play Swingarm Spindle Nut Loose |2.4.A2a|i|| | 1 |
| Front wheel spindle securing nut locking device insecure |2.3.5a| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Nearside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Headlamp main beam affected by the operation of the horn |1.2.2c| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Rear Chain guard fouling another component |6.2.1c| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Rear Brake linkage has abnormal movement due to excessive wear |3.2.A1i| | 1 |
| Front Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Offside Upper Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Front wheel spindle loose |2.3.3a| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Offside Lower Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Rear Lower Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Offside Rear Lower Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Offside Rear Brake locking device missing |3.2.A1e| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear Rear position lamp insecure |1.1.1c| | 1 |
| Nearside Front Direction indicator lens defective such that the emitted light is adversely affected |4.4.1 |b| |ii|| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Nearside Lower Front suspension assembly excessive wear or free play in a front suspension component torque arm |2.3.4| | 1 |
| Offside Lower Front suspension assembly excessive wear or free play in a front suspension component torque arm |2.3.4| | 1 |
| Nearside Front Brake locking device missing |3.2.A1e| | 1 |
| An item not tested |Manual| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Rear reflector on motorcycle insecure |1.4.2c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Nearside Front Brake hose leaking fluid |3.2.B4| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 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 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Floor brake test Neither brake control achieves an efficiency of 25% |3.3.C1b| | 1 |
| Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Front Brake lever attachment screws loose |3.1.2b| | 1 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Upper Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Wheel spoke excessively corroded |4.2.1b| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Handlebar mounting excessively deteriorated |flexible type| |2.1.1d| | 1 |
| Offside Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Rear Brake component is excessively corroded |3.1.5| | 1 |
| Front Headlamp switch faulty |1.2.4| | 1 |
| Centre Headlamp not working on dipped beam |1.7.5a| | 1 |
| Centre Headlamp not working on main beam |1.7.5a| | 1 |
| Nearside Stop lamp not working |1.2.1b| | 1 |
| Offside Stop lamp not working |1.2.1b| | 1 |
| Horn not working |1.6.2a| | 1 |
| Direction indicators not working |1.4.A.2c| | 1 |
| Hazard warning lamps not flashing in phase, with ignition on |1.4.B.1f| | 1 |
| Hazard warning lamps not flashing in phase, with ignition off |1.4.B.1f| | 1 |
| Hazard warning tell tale not working correctly |1.4.B.1e| | 1 |
| Offside Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Handlebar deformed |2.1.1b| | 1 |
| Centre Throttle operating incorrectly |6.2.1f| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Nearside Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Brake pedal is inoperative |3.1.3c| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Brake lever mounting insecure |3.1.2a| | 1 |
| Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Offside Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Brake pedal has inadequate reserve travel foot peddle hits exhaust on full travel |3.1.3b| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Front Brake linkage has abnormal movement due to excessive wear |3.2.A1i| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Front wheel insecure |4.2.3b| | 1 |
| Headlamp switch insecure |1.2.4| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Offside Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Nearside Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Plate brake test No brake control achieves an efficiency of 30%. |3.3.B2a| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Offside Rear Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Central Rear Position lamp not working |4.2.1 |a|| | 1 |
| Nearside Front Fuel hose insecure petrol tap /pipe needed clip to secure. |6.1.3 |a| |i|| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Front Horn is not continous or uniform |1.7.3c| | 1 |
| Front Footrest missing |6.2.1a| | 1 |
| Brake linkage has abnormal movement due to excessive wear |3.2.A1i| | 1 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Position lamp switch faulty rear lights do not turn off |1.1.4a| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Rear Brake pedal mounting insecure |3.1.2a| | 1 |
| Steering lock stop ineffective |2.1.3| | 1 |
| Offside Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride footrest clevis pin end broken off |6.2.1h| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Rear position lamp deteriorated and function impaired very dim |1.1.1b| | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Nearside Rear Footrest insecure (6.2.12 (a)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Upper Fork yoke insecure Upper steering yoke fixing nut loose ,[ tightened at station.] (2.2.2 (d) (i)) | 1 |
| Horn not working (7.7 (a)) | 1 |