| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 50 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 22 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 20 |
| Registration plate issues | 20 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 18 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 14 |
| Steering headbearing has excessive free play |2.2.2| | 13 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 12 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 11 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 11 |
| Rear reflector on motorcycle missing |1.4.1| | 10 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 10 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 8 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 7 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 7 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 6 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Nearside Front Direction indicator not working |1.5.1c| | 5 |
| 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| | 5 |
| Horn not working |1.7.3a| | 5 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 4 |
| Headlamp aim not tested |1.6| | 4 |
| Riders seat insecure |6.2.1a| | 4 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Indicator tell tale not functioning |1.5.2| | 3 |
| Front Brake caliper|s| insecure |3.2.A1j| | 2 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Rear Seat insecure |6.2.1a| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| An item not tested |Manual| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Horn control defective |1.7.2a| | 2 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Seat insecure |6.2.1a| | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 2 |
| Front Steering lock stop missing |2.1.3| | 2 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Front Riders seat insecure |6.2.1a| | 1 |
| Rear Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Front wheel spindle securing nut locking device insecure |2.3.3a| | 1 |
| Front Fork yoke deformed |2.1.1b| | 1 |
| Brake lever has inadequate reserve travel front brake lever no ressistance motor sound brake normal but a.b.s light and indicator flashing eventually brake lever is back to pressure but then when ignitin is turned off returns to no ressistance on lever |3.1.3b| | 1 |
| Front Front shock absorber seal failed and leaking oil left hand side |2.3.3| | 1 |
| Fuel cap does not fasten securely by a positive means |7.2.2b| | 1 |
| Nearside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake lever is inoperative |3.1.3c| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Offside Front Brake lever is inoperative |3.1.3c| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Offside Front Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Rear Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Offside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Steering lock stop missing |2.1.3| | 1 |
| Offside Steering lock stop missing |2.1.3| | 1 |
| Centre Front Lower Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Brake component is excessively corroded |3.1.5| | 1 |
| Offside Throttle operating incorrectly |6.2.1f| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Brake lever insecure |3.1.2a| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Centre Rear Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Front suspension assembly component excessively bent |2.3.1| | 1 |
| Central Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Central Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Registration plate lamp issues | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Rear Brake lever pivots excessively worn |3.1.3a| | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Rear position lamp obscured more than 50% |1.1.1d| | 1 |
| Front Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Brake lever mounting insecure |3.1.2a| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 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 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Rear Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Suspension component fractured |5.3.3 |b| |ii|| | 1 |
| Fuel system component leaking |6.1.3 |b| |i|| | 1 |
| Front Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Nearside Front Upper Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Centre Rear Upper Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 1 |
| Offside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Offside Rear Motorcycle structure cracked |6.1.1a| | 1 |
| Front Headlamp switch faulty |1.2.4| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Nearside Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Riders seat with a defective supporting structure does not secure in a closed position (6.2.5 (a) (i)) | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Front Brake component damaged and seriously reduced in strength |3.2.A1| | 1 |
| Rear Brake component damaged and seriously reduced in strength |3.2.A1| | 1 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Rear Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Centre Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front wheel spindle securing nut locking device insecure |2.3.5a| | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front Leg shield insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Front Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |