| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 35 |
| Drive chain excessively loose |6.2.1d| | 26 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 21 |
| Drive chain worn to excess |6.2.1e| | 14 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 11 |
| Front wheel bearings are excessively rough |2.3.5b| | 10 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 9 |
| Registration plate issues | 9 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 8 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 8 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Stop lamp remains on when the brake is released |1.3.1e| | 7 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 6 |
| Front wheel bearings have excessive free play |2.3.5b| | 6 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 6 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Front Brake excessively binding (1.2.1 (f)) | 5 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 4 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 4 |
| Rear Drive chain excessively loose |6.2.1d| | 4 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 4 |
| Handlebar deformed |2.1.1b| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Horn not working |1.7.3a| | 4 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Rear Wheel spoke missing |4.2.1b| | 2 |
| Brake pedal is inoperative |3.1.3c| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Brake locking device missing |3.2.A1e| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear 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 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear Wheel spoke cracked. |4.2.1b| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Indicator tell tale not functioning |1.5.2| | 2 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 2 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Offside Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Rear Brake cable excessively corroded |3.2.A1b| | 1 |
| Centre Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Offside Rear Lower Drive chain excessively loose |6.2.1d| | 1 |
| Front Indicator tell tale not functioning |1.5.2| | 1 |
| Offside Rear Direction indicator missing |1.5.1a| | 1 |
| Outer Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Gradient brake test indicates a binding brake |3.3.D1c| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Upper Fuel system component insecure |7.2.1b| | 1 |
| Nearside Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Nearside Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Rear Wheel spoke excessively corroded |4.2.1b| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Pillion seat insecure (6.2.6 (a) (ii)) | 1 |
| Rear Stop lamp not working cntroll 1 (4.3.1 (a) (ii)) | 1 |
| Front Brake grabbing severely (1.2.1 (c)) | 1 |
| Rear Exhaust system insecure (6.1.2 (a)) | 1 |
| Rear Suspension arm corroded and seriously weakened (5.3.3 (b) (i)) | 1 |
| Position lamp switch does not operate the front and rear position lamps |1.1.4c| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Brake linkage clevis joint excessively worn |3.2.A1d| | 1 |
| Rear Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Handlebar excessively deformed (2.2.1 (c) (i)) | 1 |
| Rear Lower Brake locking device missing torque arm bolt |3.2.A1e| | 1 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 1 |
| Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Handlebar deformed |2.1.1b| | 1 |
| Rear Brake grabbing severely |1.2.1 |c|| | 1 |
| Handlebar so insecure it is likely to become detached |2.2.1 |b| |ii|| | 1 |
| Gradient brake test No brake control achieves an efficiency of 30% |1.2.2 |a| |i|| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Nearside Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Offside Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear Pillion seat with a defective supporting structure (6.2.6 (a) (i)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Stop lamp not working rear operation (4.3.1 (a) (ii)) | 1 |
| Rear Suspension component pin or bush excessively worn swing arm (5.3.4 (a) (i)) | 1 |
| Rear Drive chain sprocket worn to excess sprocket carrier (6.1.7 (c) (i)) | 1 |
| Drive chain horseshoe locking device likely to become detached (6.1.7 (j) (ii)) | 1 |
| Rear Brake cable guide defective and affecting operation |1.1.15 |d|| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Stop lamp remains on when the brake is released (1.3.1e) | 1 |
| Rear Brake locking device missing (3.2.A1e) | 1 |
| All direction indicators missing all (4.4.1 (a) (ii)) | 1 |
| Nearside Rear Direction indicators not working (1.5.1c) | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort (3.3.A1c) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. (3.3.A2b) | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Rear Brake cable has restricted free movement (1.1.15 (e)) | 1 |
| Direction indicator missing |1.5.1a| | 1 |
| Front Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Nearside Indicator tell tale not functioning |1.5.2| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Built up wheel has a loose bolt/s |4.2.1c| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Stop lamp does not illuminate immediately a brake applies Brake pedal does not operate stop lamp. |1.3.1a| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Front Stop lamp not working Front brake light switch inoperative (4.3.1 (a) (ii)) | 1 |
| Rear Wheel fixing loose (single fixing) (5.2.1 (a) (ii)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Offside Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Offside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake locking device missing split pin missing from torque reaction arm |3.2.A1e| | 1 |
| Nearside Brake component has restricted free movement and operation is likely to be impeded rear brake cable seized |3.2.A1h| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Brake master cylinder leaking |1.1.10 |b| |ii|| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Offside Front shock absorber seal failed and leaking oil fork seal |2.3.3| | 1 |
| Offside Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear Lower Brake locking device missing |3.2.A1e| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Brake fluid reservoir severely damaged |3.2.B1b| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Rear suspension component misaligned |2.4.A.1a| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Rear Direction indicator incorrect colour |4.4.3 |a|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Stop lamp not working rear brake switch |4.3.1 |a| |ii|| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Nearside Front Lower Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Wheel fixing missing (single fixing) split pin missing rear brake anchor (5.2.1 (a) (ii)) | 1 |
| Nearside Front Indicator switch inoperative (4.4.2 (a) (ii)) | 1 |
| Offside Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |