| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 39 |
| Registration plate issues | 34 |
| Rear reflector on motorcycle missing |1.4.1| | 24 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 19 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 11 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Front wheel bearings have excessive free play |2.3.5b| | 10 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 9 |
| Front wheel bearings are excessively rough |2.3.5b| | 9 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 8 |
| Horn not working |1.7.3a| | 7 |
| Rear Brake disc|s| cracked |3.2.A1g| | 7 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 7 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 6 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Rear Footrest missing |6.2.1a| | 6 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 5 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Offside Front Brake disc|s| cracked |3.2.A1g| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 2 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 2 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 2 |
| Headlamp switch faulty |1.2.4| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear Exhaust markings indicating not for road use or similar wording |7.1.4| | 2 |
| Offside Front Steering lock stop ineffective |2.1.3| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Brake hose damaged | 2 |
| Indicator switch defective |1.5.4| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 2 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Nearside Steering lock stop ineffective |2.1.3| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Offside Front Brake component leaking fluid |3.2.B4| | 1 |
| Offside Front Brake disc fractured (1.1.14 (a) (ii)) | 1 |
| Wheel fixing loose (single fixing) rear wheel adjuster (5.2.1 (a) (ii)) | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Front Plate brake test indicates a sticking brake |3.3.B1a| | 1 |
| Rear reflector on sidecar missing |1.4.1| | 1 |
| Nearside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Nearside Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Offside Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Stop lamp not working front lever |4.3.1 |a| |ii|| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Horn missing |1.7.1| | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Fuel tank leaking |7.2.1a| | 1 |
| Nearside Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Offside Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Offside Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Offside Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Offside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Rear position lamp insecure |1.1.1c| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Front Brake hose excessively twisted |3.2.B3a| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Nearside Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Steering lock stop missing |2.1.3| | 1 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 1 |
| Offside Rear Footrest missing (6.2.12 (a)) | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Brake pedal insecure |3.1.2a| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Front Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Brake hose excessively deteriorated | 1 |
| Rear Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Stop lamp does not illuminate immediately a brake applies pedal |1.3.1a| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Footrest insecure damaged |6.2.12 |a|| | 1 |
| Front Direction indicator insecure |1.5.3b| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Nearside Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Offside Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Wheel fixing loose |multiple fixings| |5.2.1 |a| |i|| | 1 |
| Offside Handlebar deformed |2.1.1b| | 1 |
| Nearside Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Offside Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Nearside Fairing insecure and likely to impede the steering |2.1.2e| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Offside Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Offside Front Footrest insecure (6.2.12 (a)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Nearside Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Centre Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Motorcycle structure adversely modified |6.1.1b| | 1 |
| Rear Brake fluid reservoir insecurely mounted |3.2.B1a| | 1 |
| Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Offside Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Rear Upper Motorcycle structure cracked |6.1.1a| | 1 |
| Rear Upper Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Rear Brake pedal insecure |3.1.2a| | 1 |
| Front Brake hose stretched by steering movement |3.2.B3b| | 1 |
| Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Front Horn control defective |1.7.2a| | 1 |
| Offside Front Handlebar deformed |2.1.1b| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Fuel system component leaking |7.2.1a| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 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 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Nearside Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Registration plate lamp issues | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Offside Front Brake disc fractured cracked |1.1.14 |a| |ii|| | 1 |
| Rear Brake disc fractured cracked |1.1.14 |a| |ii|| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Stop lamp insecure |1.3.3b| | 1 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Front Stop lamp does not illuminate immediately a brake applies Stop lamp does not work when front brake is applied |1.3.1a| | 1 |
| Rear Rear reflector on motorcycle missing Rear reflector missing |1.4.1| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Central Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Front Horn not working |1.7.3a| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Footrest insecure |6.2.1a| | 1 |
| Front Brake lever cracked |3.1.2c| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Offside Rear Upper Direction indicators not working |1.5.1c| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Rear Brake hose damaged and likely to fail |1.1.12 |a|| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Nearside Rear Footrest insecure |6.2.12 |a|| | 1 |
| Offside Rear Footrest insecure |6.2.12 |a|| | 1 |
| Nearside Front Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Nearside Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front shock absorber seal failed and leaking oil (2.3.3) | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp (1.2.2b(i)) | 1 |
| Nearside Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Offside Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Headlamp aim not tested headlamps not working (4.1.2 (b)) | 1 |
| Front position lamp does not illuminate immediately when switched on (1.1.3a) | 1 |
| Rear Front position lamp does not illuminate immediately when switched on (1.1.3a) | 1 |
| Offside Headlamp at least one does not illuminate on dipped beam (1.2.2a(i)) | 1 |
| Offside Headlamp at least one does not illuminate on main beam (1.2.2a(ii)) | 1 |
| Offside Front shock absorber seal failed and leaking oil (2.3.3) | 1 |
| Rear reflector on motorcycle missing (1.4.1) | 1 |
| Front Floor brake test indicates a binding brake (3.3.C2c) | 1 |
| Nearside Front Exhaust excessively deteriorated |7.1.1a| | 1 |
| Offside Front Lower Brake component is fractured |3.1.5| | 1 |
| Offside Front Lower Brake hose leaking fluid |3.2.B4| | 1 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 1 |
| Nearside Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Offside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Brake pipe union leaking fluid |3.2.B4| | 1 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Offside Front Upper Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Brake master cylinder has a seized master cylinder pivot. |3.2.B5| | 1 |
| Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |