| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 34 |
| Drive chain excessively loose |6.2.1d| | 14 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 12 |
| Front wheel bearings have excessive free play |2.3.5b| | 12 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| 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| | 9 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 9 |
| Drive chain worn to excess |6.2.1e| | 8 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 8 |
| Registration plate issues | 7 |
| Horn not working |1.7.3a| | 7 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 4 |
| Rear suspension component excessively corroded. |2.4.A.1a| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Rear reflector on motorcycle missing |1.4.1| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 3 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 3 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 3 |
| Horn not working (7.7 (a)) | 3 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Front Brake excessively binding |1.2.1 |f|| | 2 |
| Fuel hose leaking |7.2.1a| | 2 |
| Nearside Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 2 |
| Rear Rear suspension component excessively corroded. |2.4.A.1a| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Steering linkage locking device missing (2.1.3 (d)) | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Offside Front Direction indicator incorrect colour |4.4.3 |a|| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Rear Lower Rear suspension component excessively corroded. |2.4.A.1a| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Footrest insecure |6.2.1a| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Centre Lower Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Centre Lower Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Front Horn not working (7.7 (a)) | 1 |
| Offside Front Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Brake grabbing severely |1.2.1 |c|| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Nearside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Brake disc|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Sidecar rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Nearside Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front wheel spindle securing nut|s| loose |2.3.3a| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Handlebar mounting so insecure that steering is adversely affected (2.2.1 (a) (ii)) | 1 |
| Front All direction indicators incorrect colour (4.4.3 (a)) | 1 |
| Rear All direction indicators incorrect colour (4.4.3 (a)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Nearside Rear Road spring mounting insecure (5.3.1 (a) (i)) | 1 |
| Offside Rear Road spring mounting insecure (5.3.1 (a) (i)) | 1 |
| Brake caliper insecurely mounted and braking performance affected (1.1.16 (c) (ii)) | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Nearside Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Nearside Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Brake hose excessively deteriorated | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Front Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Nearside Rear All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Central Front Headlamp insecure (4.1.1 (c)) | 1 |
| Motorcycle structure excessively corroded swinging arm webbing excessively corroded |6.1.1a| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Brake cylinder severely corroded |3.2.B1b| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Front Brake pipe likely to become detached or damaged (1.1.11 (d) (ii)) | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Front Brake hose leaking fluid |3.2.B4| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. Swing arm |2.4.A.2d| | 1 |
| Rear wheel spindle securing nut locking device insecure Split pin missing |2.4.A.2b| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Lower Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Front Hydraulic brake control creeps under load. |3.1.4a| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Front wheel insecure |4.2.3b| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Rear Lower Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Offside Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front suspension fouling which affects the movement of the front suspension. |2.3.6a| | 1 |
| Rear Wheel spoke cracked |5.2.2 |d|| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Nearside Front Brake back plate|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Front Brake component is excessively corroded |3.1.5| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Rear Brake back plate|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear Lower Motorcycle structure corroded to the extent that the rigidity of the assembly is significantly reduced |6.1.1 |c| |i|| | 1 |
| Offside Steering operation fouling on the fuel tank or bodywork on full lock |2.1.4 |b|| | 1 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Brake locking device insecure |3.2.A1e| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |