| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 46 |
| Rear reflector on motorcycle missing |1.4.1| | 24 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 16 |
| Registration plate issues | 15 |
| Drive chain excessively loose |6.2.1d| | 14 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 11 |
| 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| | 10 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 10 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Drive chain worn to excess |6.2.1e| | 9 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 7 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Headlamp aim beam image kick up to the offside |1.6| | 7 |
| Front wheel bearings have excessive free play |2.3.5b| | 7 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 6 |
| Front wheel bearings are excessively rough |2.3.5b| | 5 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Stop lamp remains on when the brakes are released | 4 |
| Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Horn not working |1.7.3a| | 3 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 3 |
| Front Brake excessively binding |1.2.1 |f|| | 3 |
| Offside Front Footrest insecure |6.2.1a| | 3 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Front Brake disc|s| cracked |3.2.A1g| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Indicator switch defective |1.5.4| | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Nearside Front Direction indicator missing |1.5.1a| | 2 |
| Nearside Rear Direction indicator missing |1.5.1a| | 2 |
| Offside Front Direction indicator missing |1.5.1a| | 2 |
| Offside Rear Direction indicator missing |1.5.1a| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 2 |
| Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Offside Front Direction indicator insecure |1.5.3b| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Fuel system component leaking (6.1.3 (b) (i)) | 1 |
| Rear Brake cable has restricted free movement (1.1.15 (e)) | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Offside Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Stop lamp not working loose connection (4.3.1 (a) (ii)) | 1 |
| Rear Position lamp not working loose connection (4.2.1 (a)) | 1 |
| Rear Brake fluid reservoir fluid level significantly below minimum level |1.1.10 |d| |ii|| | 1 |
| Rear suspension bush has excessive free play swing arm |2.4.A2a|i|| | 1 |
| Offside Indicator switch defective |1.5.4| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Direction indicator adversely affected by the operation of another lamp (4.4.3 (b)) | 1 |
| Rear Stop lamp emits other than a steady red light (4.3.3 (a) (ii)) | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Front Front position lamp insecure |1.1.1c| | 1 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Headlamp missing |1.2.3a| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Front Shock absorber has a serious fluid leak also rust on stanchions |5.3.2 |b|| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Front Wheel fixing loose |single fixing| front axle securing bolt loose |5.2.1 |a| |ii|| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Wheel alignment incorrect which adversely affects the steering Chain adjustment. (2.4 (a)) | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Brake pedal not releasing correctly and functionality of brakes affected control #2 (1.1.2 (b) (ii)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected sticking (6.2.7 (a) (ii)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Nearside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Upper Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Nearside Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Wheel spindle loose |5.2.1 |c| |i|| | 1 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear Motorcycle structure excessively distorted |6.1.1a| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Front Brake lining(s) contaminated (1.1.13 (b)) | 1 |
| Plate brake test No brake control achieves an efficiency of 30% (1.2.2 (a) (i)) | 1 |
| Front Brake hose excessively stretched Flexible brake hose stretched when forks are fully extended. (1.1.12 (b) (ii)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Central Front Upper Horn not working |1.7.3a| | 1 |
| Central Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Front Handlebar so insecure it is likely to become detached |2.2.1 |b| |ii|| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear Front mudguard insecure |2.3.7| | 1 |
| Rear Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies lever |1.3.1a| | 1 |
| Rear Footrest missing OS and NS |6.2.1a| | 1 |
| Front shock absorber seal failed and leaking oil both |2.3.3| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Horn not working no sound |1.7.3a| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Offside 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 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Nearside Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Shock absorber has negligible damping effect Both (5.3.2 (b)) | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Front Brake lagging in operation (1.2.1 (d)) | 1 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Offside Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Rear Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Suspension arm pin or bush excessively worn swinging arm (5.3.4 (a) (i)) | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |