| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 43 |
| Registration plate issues | 12 |
| Steering headbearing has excessive free play |2.2.2| | 10 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 10 |
| Drive chain excessively loose |6.2.1d| | 10 |
| Rear reflector on motorcycle missing |1.4.1| | 10 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 8 |
| Drive chain worn to excess |6.2.1e| | 8 |
| Nearside Rear Footrest missing |6.2.1a| | 8 |
| Horn not working |1.7.3a| | 7 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Offside Rear Footrest missing |6.2.1a| | 6 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 6 |
| Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Headlamp insecure |1.2.3b| | 5 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 5 |
| Nearside Rear Direction indicator not working |1.5.1c| | 5 |
| Brake locking device missing |3.2.A1e| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Front mudguard insecure |2.3.7| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 4 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Offside Rear Direction indicator not working |1.5.1c| | 4 |
| Nearside Rear Footrest insecure |6.2.1a| | 4 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Nearside Front Direction indicator not working |1.5.1c| | 3 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 3 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 3 |
| Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Exhaust excessively deteriorated |7.1.1a| | 3 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Offside Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Fuel system component insecure |7.2.1b| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Indicator tell tale not functioning |1.5.2| | 2 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Nearside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Rear Motorcycle structure excessively corroded |6.1.1a| | 2 |
| Offside Exhaust excessively deteriorated |7.1.1a| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Footrest insecure |6.2.1a| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Exhaust mounting missing |7.1.1c| | 2 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Fuel cap mounting flange/sealing method defective |7.2.2c| | 2 |
| 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 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 2 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 2 |
| Headlamp light intensity severely reduced (4.1.4 (a)) | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Fuel hose insecure (6.1.3 (a) (i)) | 1 |
| Brake drum insecure security pin missing (1.1.14 (a) (ii)) | 1 |
| Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Steering lock stop missing |2.1.3| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Headlamp damaged and function impaired |1.2.3a| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Offside Exhaust mounting missing |7.1.1c| | 1 |
| Nearside Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Offside Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Front Wheel excessively distorted |5.2.2 |c| |i|| | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Rear All direction indicators obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Front Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Front position lamp insecure |1.1.1c| | 1 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Brake pedal insecure |3.1.2a| | 1 |
| Nearside Rear Upper Riders seat insecure |6.2.1a| | 1 |
| Offside Rear Upper Riders seat insecure |6.2.1a| | 1 |
| Nearside Rear Upper Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Nearside Rear Upper Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Offside Rear Upper Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Offside Outer Rear Lower Brake locking device missing |3.2.A1e| | 1 |
| Offside Front Upper Brake locking device missing |3.2.A1e| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Nearside Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Offside Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear Brake back plate|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Front Fuel tank leaking |7.2.1a| | 1 |
| Nearside Front Brake cable badly frayed |3.2.A1b| | 1 |
| Nearside Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Nearside Front Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Nearside Steering lock stop missing |2.1.3| | 1 |
| Offside Steering lock stop missing |2.1.3| | 1 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Fuel tank leaking |7.2.1a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride CHAIN SPLIT LINK |6.2.1h| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Brake linkage clevis joint excessively worn |3.2.A1d| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Brake locking device insecure rear arm |3.2.A1e| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Offside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Brake locking device missing |3.2.A1e| | 1 |
| Front Brake component has an inadequate repair |3.1.5| | 1 |
| Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Rear suspension component excessively corroded. |2.4.A.1a| | 1 |
| Rear Footrest insecure |6.2.1a| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Offside Front Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Steering lock stop maladjusted |2.1.3| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Front Upper Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Lower Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Rear Brake linkage clevis joint excessively worn |3.2.A1d| | 1 |
| Rear Upper Brake locking device missing |3.2.A1e| | 1 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Front Steering lock stop ineffective |2.1.3| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear Drive belt excessively tight, so that it is likely to fail |6.1.7 |k| |ii|| | 1 |
| Front Headlamp switch faulty |1.2.4| | 1 |
| Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Nearside Rear Lower Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Front suspension assembly component loose |2.3.1| | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Offside Rear Direction indicator obscured |1.5.1a| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Front Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Front Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Front Brake lever attachment screws loose |3.1.2b| | 1 |
| Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Nearside Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Footrest missing |6.2.1a| | 1 |
| Rear suspension component excessively corroded. SWINGING ARM AS MARKED |2.4.A.1a| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Offside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Direction indicator incorrect colour |1.5.1b| | 1 |
| Nearside Rear Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Offside Front Brake lever cracked |3.1.2c| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Handlebar so insecure it is likely to become detached (2.2.1 (b) (ii)) | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Front Brake lever mounting insecure |3.1.2a| | 1 |
| 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| | 1 |
| Centre Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Front Brake lever attachment screws missing |3.1.2b| | 1 |
| Rear Brake component is excessively corroded |3.1.5| | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Front suspension assembly component missing |2.3.1| | 1 |
| Nearside Front Steering lock stop ineffective |2.1.3| | 1 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |