| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 18 |
| Steering headbearing has excessive free play |2.2.2| | 18 |
| Drive chain excessively loose |6.2.1d| | 15 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Horn not working |1.7.3a| | 9 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Nearside Rear Footrest missing |6.2.1a| | 5 |
| Offside Rear Footrest missing |6.2.1a| | 5 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 5 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 4 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 4 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 4 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Drive chain worn to excess |6.2.1e| | 3 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 3 |
| Nearside Footrest missing |6.2.1a| | 2 |
| Offside Footrest missing |6.2.1a| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 2 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 2 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Brake hose excessively deteriorated | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Brake has no recorded effort at a wheel |1.2.1 |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 Footrest insecure |6.2.1a| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Offside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 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 |
| Nearside Indicator tell tale not functioning |1.5.2| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Chain guard insecure |6.1.7 |i|| | 1 |
| Drive chain sprocket excessively loose cush drive worn out |6.1.7 |c| |i|| | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Rear suspension bush has excessive free play Swinging Arm |2.4.A2a|i|| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Centre Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Footrest missing (6.2.12 (a)) | 1 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Stop lamp showing white light to the rear |4.3.3 |a| |ii|| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Registration plate issues | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Brake back plate|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Rear Brake pedal is inoperative |3.1.3c| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Rear wheel rotation likely to be impeded drive chain seized |6.2.1b| | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Brake rod insecure rear brake arm onto cam missing securing bolt (1.1.15 (c)) | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Nearside Front Direction indicator with a multiple light source more than 1/2 not functioning (4.4.1 (a) (ii)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Front Shock absorber has a serious fluid leak both |5.3.2 |b|| | 1 |
| Front Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Centre Front Lower Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Front Headlamp aim not tested |1.6| | 1 |
| Centre Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear Floor brake test indicates a severely grabbing brake |3.3.C2d| | 1 |
| Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Brake master cylinder severely damaged |3.2.B1b| | 1 |
| Front Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Stop lamp not working rear brake control |4.3.1 |a| |ii|| | 1 |
| Front Brake lever mounting insecure |3.1.2a| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Offside Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Front Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Brake hose damaged | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Rear Riders seat insecure |6.2.1a| | 1 |
| Front Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Front Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Front Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Chain guard fouling another component |6.2.1c| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Rear suspension has a fracture of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 1 |
| Offside Rear Footrest missing (6.2.12 (a)) | 1 |
| Brake pedal is positioned so that the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Centre Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Nearside Horn control defective |1.7.2a| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Upper Brake component has an inadequate repair |3.1.5| | 1 |
| Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Front Footrest missing |6.2.1a| | 1 |
| Offside Steering lock stop maladjusted |2.1.3| | 1 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Rear spring corroded and seriously weakened both |2.4A1b|ii|| | 1 |
| Motorcycle structure excessively corroded rear swinging arm badly corroded and holed |6.1.1a| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Throttle operating incorrectly loose |6.2.1f| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Front Brake hose fouling |3.2.B3b| | 1 |
| Rear position lamp incorrect colour lens faded |1.1.2b| | 1 |
| Fuel cap mounting flange/sealing method defective |7.2.2c| | 1 |
| Front Brake hose bulging under pressure |1.1.12 |d|| | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |