| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 37 |
| Drive chain excessively loose |6.2.1d| | 28 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Stop lamp remains on when the brakes are released | 13 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 10 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 8 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 8 |
| Front wheel bearings are excessively rough |2.3.5b| | 7 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 7 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 6 |
| Drive chain worn to excess |6.2.1e| | 6 |
| Registration plate issues | 6 |
| Rear Position lamp not working (4.2.1 (a)) | 6 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 5 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 5 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 5 |
| Drive chain excessively tight |6.2.1d| | 5 |
| Headlamp aim beam image kick up to the offside |1.6| | 5 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Registration plate lamp issues | 5 |
| Front Brake excessively binding (1.2.1 (f)) | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Handlebar deformed |2.1.1b| | 4 |
| Rear reflector on motorcycle missing |1.4.1| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 3 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 3 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 3 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Nearside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 3 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 2 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 2 |
| Headlamp aim not tested (4.1.2 (b)) | 2 |
| Front Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 2 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| 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)) | 2 |
| Handlebar mounting clamp loose |2.1.1a| | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Front Brake excessively binding |1.2.1 |f|| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Headlamp lens seriously defective (4.1.1 (b) (ii)) | 1 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride horse shoe fitted the wrong way |6.2.1h| | 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 |
| Central Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Stop lamp not working footbrake micro switch not connected |4.3.1 |a| |ii|| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Stop lamp does not illuminate by the operation of both brake controls foot brake (4.3.2 (a) (iii)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Handlebar handgrip missing |2.1.1c| | 1 |
| Offside Handlebar handgrip missing |2.1.1c| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Drive belt excessively loose |6.1.7 |c| |i|| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Front Brake fluid reservoir severely damaged |3.2.B1b| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride Rear chain link clip incorrectly fitted. |6.2.1h| | 1 |
| Horn not working |1.7.3a| | 1 |
| Stop lamp does not illuminate immediately a brake applies Not working from rear brake. |1.3.1a| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Exhaust system insecure (6.1.2 (a)) | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Front Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Front Horn not working (7.7 (a)) | 1 |
| Parking brake efficiency below requirements (1.4.2 (a) (i)) | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Hazard warning switch missing |1.4.B.1d| | 1 |
| Rear Suspension component attachment bracket/mounting insecure and impairing directional stability axle loose |5.3.3 |a| |ii|| | 1 |
| Nearside Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Nearside Rear Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Parking (secondary brake) on a single line braking system has no recorded effort at a wheel (1.3.1 (a) (ii)) | 1 |
| Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Motorcycle structure is so deformed it is likely to adversely affect braking or steering steering bent so front and back wheels are not in line |6.1.1 |a| |ii|| | 1 |
| Handlebar deformed to the extent that steering is affected |2.2.1 |c| |ii|| | 1 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied |1.1.2 |d|| | 1 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Handlebar grip insecure to handlebar both grips loose (2.2.1 (d) (ii)) | 1 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Headlamp light intensity severely reduced (4.1.4 (a)) | 1 |
| Brake hose is likely to be fouled or trapped by moving parts mount insecure |3.2.B2c| | 1 |
| Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Wheel alignment incorrect which adversely affects the handling front yoke misaligned |2.5.1| | 1 |
| Front Brake hose leaking (1.1.12 (c)) | 1 |
| Brake caliper leaking and braking performance affected (1.1.16 (b) (ii)) | 1 |
| Brake performance not tested (1.2.1 (g)) | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Roller brake test indicates a binding brake rear brake lever sticking in brake drum |3.3.A1a| | 1 |
| Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Rear Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Throttle operating incorrectly throttle hanging on at full right lock |6.2.1f| | 1 |
| Nearside Motorcycle structure excessively damaged gear lever bent and cant be operated properly |6.1.1a| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Offside Rear Lower Stop lamp likely to become detached (4.3.1 (c) (ii)) | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Wheel spindle or securing nut(s) so insecure that wheel security or steering control is adversely affected (5.2.1 (c) (ii)) | 1 |
| Position lamp not working |4.2.1 |a|| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Motorcycle structure excessively distorted |6.1.1a| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Brake pedal not releasing correctly and functionality of brakes affected BRAKE STICKING ON (1.1.2 (b) (ii)) | 1 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Rear Brake effort inadequate at a wheel |1.2.1 |a| |i|| | 1 |
| Nearside Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Steering headbearing has excessive wear or free play notchy |2.2.2 |f| |i|| | 1 |
| Headlamp not working on dipped beam no sided light |4.1.1 |a| |ii|| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Offside Shock absorber has a serious fluid leak (5.3.2 (b)) | 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 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Nearside Rear Direction indicator incorrect colour lens |1.5.1b| | 1 |
| Offside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Stop lamp does not illuminate immediately a brake applies from front brake lever |1.3.1a| | 1 |
| Brake reaction bracket insecure |3.2.A1j| | 1 |
| Brake lever cracked |3.1.2c| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Centre Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Throttle operating incorrectly not returning |6.2.7 |a| |i|| | 1 |
| Rear Brake effort inadequate at a wheel excessive travel |1.2.1 |a| |i|| | 1 |
| Rear Stop lamp missing |1.3.3a| | 1 |
| Rear Stop lamp remains on when the brake is released Cable seized |1.3.1e| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Drive chain excessively tight |6.1.7 |k| |i|| | 1 |
| Nearside Rear Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Shock absorber likely to become detached off side top nut missing |5.3.2 |a| |ii|| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Rear Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Rear Stop lamp not working rear brake switch broken (4.3.1 (a) (ii)) | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Nearside Rear Drive chain excessively tight |6.2.1d| | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Offside Position lamp switch insecure |1.1.4b| | 1 |
| Front Brake hose connection leaking (1.1.12 (c)) | 1 |
| Front Brake fluid not visible (1.1.10 (d) (iii)) | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Steering linkage component deformed Headset bearings (2.1.3 (c) (i)) | 1 |
| Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Nearside Rear Direction indicator obviously incorrectly positioned |4.4.3 |a|| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Offside Front Throttle control functioning such that safe operation of the motorcycle is adversely affected revs rise bars turned (6.2.7 (a) (ii)) | 1 |
| Offside Rear Brake rod insecure split pin missing (1.1.15 (c)) | 1 |
| Nearside Rear Lower Drive chain so loose it is likely to fail Drive chain loose adjusted on test PRS |6.1.7 |c| |ii|| | 1 |
| Rear Brake pedal is inoperative |3.1.3c| | 1 |
| Stop lamp remains on when the brake is released REAR BRAKE |1.3.1e| | 1 |