| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 23 |
| Horn not working |1.7.3a| | 14 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 10 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 7 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 7 |
| Direction indicators not working |1.5.1c| | 7 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Stop lamp remains on when the brake is released |1.3.1e| | 6 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 6 |
| Steering headbearing has excessive free play |2.2.2| | 6 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 6 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 6 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 4 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 4 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 4 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 3 |
| Direction indicator not working |1.5.1c| | 3 |
| Front Direction indicators not working |1.5.1c| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Rear Wheel spoke excessively corroded |4.2.1b| | 3 |
| Exhaust excessively deteriorated |7.1.1a| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Rear Wheel spoke missing |4.2.1b| | 3 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 3 |
| Rear position lamp insecure |1.1.1c| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 2 |
| Rear Direction indicators not working |1.5.1c| | 2 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 2 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 2 |
| Rear Brake lever cannot be released smoothly |3.1.3d| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Nearside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Nearside Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 2 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 2 |
| Offside Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Front Brake lever is inoperative |3.1.3c| | 2 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 2 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Rear Direction indicator insecure |1.5.3b| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Offside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Rear Wheel fixing loose |single fixing| |5.2.1 |a| |ii|| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear Floor brake test indicates a severely grabbing brake |3.3.C2d| | 1 |
| Rear Brake linkage has abnormal movement due to excessive wear |3.2.A1i| | 1 |
| All direction indicators adversely affected by the operation of another lamp |4.4.3 |b|| | 1 |
| Steering linkage component insecure to the motorcycle structure (2.1.3 (a) (i)) | 1 |
| Rear Direction indicator likely to become detached |4.4.1 |c| |ii|| | 1 |
| Suspension component ball joint excessively worn rear swinging arm bushes excessive sidepaly |5.3.4 |a| |i|| | 1 |
| Rear Wheel excessively distorted |5.2.2 |c| |i|| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Rear Brake drum|s| securing bolt|s| missing |3.2.A1g| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Handlebar so insecure it is likely to become detached (2.2.1 (b) (ii)) | 1 |
| Central Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Upper Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Front Front suspension assembly excessive wear or free play in a front suspension component fork bottom bush |2.3.4| | 1 |
| Offside Front Front suspension assembly excessive wear or free play in a front suspension component fork bottom bush |2.3.4| | 1 |
| Rear Wheel spoke excessively bent |4.2.1b| | 1 |
| Direction indicators not working all indicators |1.5.1c| | 1 |
| Nearside Rear Brake lever insecure |3.1.2a| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Nearside Front suspension has severe distortion of a load bearing member or its supporting structure. |2.3.8| | 1 |
| Offside Front suspension has severe distortion of a load bearing member or its supporting structure. |2.3.8| | 1 |
| Front Wheel spoke excessively corroded |4.2.1b| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Front Brake cable excessively corroded cable sticking |3.2.A1b| | 1 |
| Rear Brake lagging in operation |1.2.1 |d|| | 1 |
| Front suspension assembly component excessively corroded. bottom yoke/upper fork |2.3.1| | 1 |
| Nearside Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Horn not working (7.7 (a)) | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Brake performance not tested (1.2.1 (g)) | 1 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Fork yoke excessively deformed (2.2.2 (d) (i)) | 1 |
| Rear Shock absorber likely to become detached (5.3.2 (a) (ii)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Front Headlamp aim not tested (4.1.2 (b)) | 1 |
| Rear Footrest insecure (6.2.12 (a)) | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Rear Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Brake cable knotted |3.2.A1b| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Front Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Offside Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Riders seat insecure |6.2.5 |a| |ii|| | 1 |
| Nearside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Offside Exhaust has part of the system missing |7.1.1a| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Rear position lamp insecure |1.1.1c| | 1 |
| Nearside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Lower Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Centre Rear Upper Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Nearside Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Offside Rear Footrest insecure (6.2.12 (a)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Offside Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Front Upper Horn not working |1.7.3a| | 1 |
| Front Upper Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Offside Rear Lower Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Rear Rear wheel bearings are excessively tight |2.4.A.2c| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Rear Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Front Steering lock stop ineffective |2.1.3| | 1 |
| Nearside Lower Fuel system component leaking |7.2.1a| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Nearside Rear Direction indicator likely to become detached |4.4.1 |c| |ii|| | 1 |
| Rear Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear suspension component seized rear shock absorbers seized |2.4A2a|ii|| | 1 |
| Fuel cap missing |7.2.2a| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Rear Plate brake test indicates a sticking brake |3.3.B1a| | 1 |
| Nearside Rear Shock absorber has negligible damping effect Seized (5.3.2 (b)) | 1 |
| Offside Rear Shock absorber has negligible damping effect Seized (5.3.2 (b)) | 1 |
| Front Position lamp missing (4.2.1 (a)) | 1 |
| Stop lamp adversely affected by the operation of another lamp Rear position and stop lamp incorrect fitment (4.3.3 (b)) | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Rear Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Offside Rear Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Engine mounting/bracket bracket excessively loose |6.1.8 |a| |ii|| | 1 |