| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 52 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 21 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Registration plate issues | 15 |
| Drive chain excessively loose |6.2.1d| | 15 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 12 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 10 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 9 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 9 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Steering headbearing has excessive free play |2.2.2| | 9 |
| Horn not working |1.7.3a| | 8 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Throttle operating incorrectly |6.2.1f| | 8 |
| Front Steering headbearing has excessive free play |2.2.2| | 7 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 6 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 6 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 6 |
| Rear reflector on motorcycle missing |1.4.1| | 5 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 5 |
| Headlamp insecure |1.2.3b| | 5 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 5 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Offside Steering lock stop ineffective |2.1.3| | 4 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Rear Drive chain excessively loose |6.2.1d| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Front Brake excessively binding (1.2.1 (f)) | 4 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Rear Brake disc|s| is excessively distorted |3.2.A1m| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 3 |
| Rear Drive chain worn to excess |6.2.1e| | 3 |
| Nearside Front Footrest insecure |6.2.1a| | 2 |
| Front Brake disc|s| cracked |3.2.A1g| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Front Brake lever insecure |3.1.2a| | 2 |
| Front Headlamp insecure |1.2.3b| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Offside Front Upper Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Rear Direction indicator incorrect colour |1.5.1b| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 2 |
| Brake locking device missing |3.2.A1e| | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Exhaust noise is clearly in excess of that emitted by a similar motor bicycle fitted with a standard silencer in average condition |7.1.2| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Brake pedal cannot be released smoothly |3.1.3d| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Front Position lamp not working |4.2.1 |a|| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Rear Brake disc fractured |1.1.14 |a| |ii|| | 2 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Offside Rear Direction indicator insecure |1.5.3b| | 2 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Chain guard insecure |6.2.1c| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Front Stop lamp missing |1.3.3a| | 2 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Offside Front Direction indicator likely to become detached |4.4.1 |c| |ii|| | 1 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Throttle operating incorrectly sticks on full right lock (6.2.7 (a) (i)) | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Nearside Front suspension assembly component excessively bent |2.3.1| | 1 |
| Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Offside Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear Brake linkage excessively corroded |3.2.A1c| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Central Front Position lamp not working |4.2.1 |a|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Offside Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Front Handlebar mounting clamp loose |2.1.1a| | 1 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Rear Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Front Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Front Upper Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Rear Upper Rear spring corroded and seriously weakened |2.4A1b|ii|| | 1 |
| Offside Rear Upper Rear spring corroded and seriously weakened |2.4A1b|ii|| | 1 |
| Nearside Front Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Nearside Front Lower Steering headbearing has excessive free play |2.2.2| | 1 |
| Nearside Front Upper Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Nearside Front Upper Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Front Upper Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Nearside Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Decelerometer brake test indicates a binding brake |3.3.E1d| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride Rear chain |6.2.1h| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Position lamp not working (4.2.1 (a)) | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Centre Front Upper Horn not working |1.7.3a| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| Position lamp switch insecure |1.1.4b| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Front Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Rear Direction indicator insecure |1.5.3b| | 1 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Front Indicator switch defective |1.5.4| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Fuel pipe leaking (6.1.3 (b) (i)) | 1 |
| Nearside Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Nearside Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Drive chain sprocket worn to excess both |6.1.7 |c| |i|| | 1 |
| Front Brake grabbing severely (1.2.1 (c)) | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Front Brake locking device insecure |3.2.A1e| | 1 |
| Front Brake disc fractured |1.1.14 |a| |ii|| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Footrest insecure |6.2.1a| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Brake pedal is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Headlamp switch insecure |1.2.4| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride Chain link clip fitted wrong way round |6.2.1h| | 1 |
| Front Riders seat insecure |6.2.1a| | 1 |
| Rear Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Centre Headlamp aim beam image too far to the right |1.6.4| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Nearside Drive chain excessively tight |6.2.1d| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Brake disc contaminated Contaminated with suspension fluid (1.1.14 (b)) | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Brake cylinder insecurely mounted |3.2.B1a| | 1 |
| Lower Rear reflector on motorcycle missing |1.4.1| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Centre Riders seat insecure |6.2.1a| | 1 |
| Offside Motorcycle structure cracked |6.1.1a| | 1 |
| Brake reaction bracket insecure |3.2.A1j| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Footrest missing left hand rear (6.2.12 (a)) | 1 |
| Exhaust system insecure left hand (6.1.2 (a)) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Fuel cap ineffective (6.1.3 (b) (i)) | 1 |
| Shock absorber has a serious fluid leak left hand fork seal (5.3.2 (b)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Brake rod insecure (1.1.15 (c)) | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Central Lower Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Wheel spoke excessively loose |5.2.2 |d|| | 1 |
| Drive chain sprocket excessively loose |6.1.7 |c| |i|| | 1 |
| Offside Rear Brake locking device missing |3.2.A1e| | 1 |
| Front Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Offside Rear Locking devices 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 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Lower Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Upper Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Front Headlamp damaged and function impaired |1.2.3a| | 1 |
| Fuel pipe leaking excessively or a risk of fire (6.1.3 (b) (ii)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Position lamp switch does not operate the front and rear position lamps |1.1.4c| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Nearside Rear Indicator tell tale not functioning |1.5.2| | 1 |
| Offside Rear Indicator tell tale not functioning |1.5.2| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Brake pedal is inoperative |3.1.3c| | 1 |
| Offside Rear Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride wheel |6.2.1h| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 1 |
| Dipswitch does not operate immediately when selected on main beam (4.1.3 (b)) | 1 |
| Nearside Rear All direction indicators obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Front Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Front Headlamp switch insecure |1.2.4| | 1 |
| Central Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Indicator switch inoperative (4.4.2 (a) (ii)) | 1 |
| Rear Brake disc|s| cracked |3.2.A1g| | 1 |
| Nearside Rear Motorcycle structure is so deformed it is likely to adversely affect braking or steering footrest bracket |6.1.1 |a| |ii|| | 1 |
| Nearside Rear Lower Shock absorber insecurely attached shock bolt loose |5.3.2 |a| |i|| | 1 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Nearside Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |