| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 31 |
| Headlamp aim out of alignment | 25 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 17 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Horn not working |1.7.3a| | 17 |
| Registration plate issues | 16 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 15 |
| Drive chain worn to excess |6.2.1e| | 15 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 13 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 13 |
| Drive chain excessively loose |6.2.1d| | 12 |
| Direction indicators not working |1.5.1c| | 11 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 11 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 11 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 10 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 9 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 9 |
| Headlamp insecure |1.2.3b| | 8 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 7 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 6 |
| Front wheel bearings have excessive free play |2.3.5b| | 6 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Front Steering headbearing has excessive free play |2.2.2| | 6 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 5 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 5 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front Wheel spoke excessively loose |4.2.1b| | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 5 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Offside Rear Direction indicator not working |1.5.1c| | 5 |
| Drive chain excessively tight |6.2.1d| | 4 |
| 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| | 4 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 4 |
| Nearside Rear Direction indicators not working |1.5.1c| | 4 |
| Offside Rear Direction indicators not working |1.5.1c| | 4 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 4 |
| Rear Drive chain worn to excess |6.2.1e| | 4 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 4 |
| Nearside Rear Footrest missing |6.2.1a| | 4 |
| Offside Rear Footrest missing |6.2.1a| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Front Headlamp insecure |1.2.3b| | 4 |
| Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Handlebar deformed |2.1.1b| | 3 |
| Nearside Front Direction indicator not working |1.5.1c| | 3 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Rear Wheel spoke excessively loose |4.2.1b| | 3 |
| Front Direction indicators not working |1.5.1c| | 3 |
| Rear Direction indicators not working |1.5.1c| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Rear Brake cylinder leaking hydraulic fluid |3.2.B1e| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Fuel tank leaking |7.2.1a| | 2 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 2 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 2 |
| Brake performance not tested |3.3| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 2 |
| Offside Steering lock stop ineffective |2.1.3| | 2 |
| Clutch lever bent so it cannot be readily operated. |6.2.1g| | 2 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Front Steering lock stop ineffective |2.1.3| | 2 |
| Horn control defective |1.7.2a| | 2 |
| Rear Brake disc|s| cracked |3.2.A1g| | 2 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Nearside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 2 |
| Offside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 2 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Rear Suspension rod pin or bush excessively worn (5.3.4 (a) (i)) | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Exhaust mounting missing |7.1.1c| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Brake pedal mounting insecure |3.1.2a| | 1 |
| Rear Brake component defective due to a deliberate modification which significantly reduces the original strength |3.1.5| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Front position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Front Brake lever is inoperative |3.1.3c| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| An item not tested |Manual| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Rear Brake disc|s| insecure |3.2.A1g| | 1 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Centre Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Nearside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Brake hose excessively kinked |3.2.B3a| | 1 |
| Front Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Riders seat missing |6.2.1a| | 1 |
| Headlamp missing |1.2.3a| | 1 |
| Offside Handlebar handgrip missing |2.1.1c| | 1 |
| Position lamp switch insecure |1.1.4b| | 1 |
| Centre Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear suspension component excessively bent |2.4.A.1a| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Rear Stop lamp missing |1.3.3a| | 1 |
| Front Direction indicator obscured |1.5.1a| | 1 |
| Stop lamp does not illuminate by the operation of both brake controls Rear brake control (4.3.2 (a) (iii)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Handlebar mounting excessively deteriorated |flexible type| |2.1.1d| | 1 |
| Front Wheel spoke missing |4.2.1b| | 1 |
| Front Wheel modified significantly reducing the original strength |4.2.1a| | 1 |
| Front Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Front wheel spindle loose |2.3.3a| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Outer Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Front wheel spindle securing nut locking device insecure |2.3.3a| | 1 |
| Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front suspension fouling which affects the movement of the front suspension. |2.3.6a| | 1 |
| Brake component leaking fluid |3.2.B4| | 1 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Nearside Rear Indicator switch insecure |1.5.4| | 1 |
| Front Wheel damaged significantly reducing the original strength |4.2.1a| | 1 |
| Front All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Nearside Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Offside Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Rear Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Centre Front Horn not working |1.7.3a| | 1 |
| Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Centre Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Vehicle identification number not legible |6.3.5a| | 1 |
| Motorcycle structure excessively distorted |6.1.1a| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Fuel cap leaking |6.1.3 |b| |i|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Brake lever pivot has excessive free play Front brake adjuster bolt insecure |1.1.1 |b|| | 1 |
| Exhaust silencer insecure |8.1.1 |b| |i|| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Front wheel spindle securing nut|s| loose |2.3.5a| | 1 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Headlamp incorrect colour |1.2.1| | 1 |
| Front Upper Handlebar mounting clamp loose |2.1.1a| | 1 |
| Rear Rear reflector on motorcycle damaged and function impaired |1.4.2a| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Brake hose damaged | 1 |
| Rear suspension has an inadequate repair of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Offside Front Upper Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Steering lock stop missing |2.1.3| | 1 |
| Offside Steering lock stop missing |2.1.3| | 1 |
| Fuel cap missing |7.2.2a| | 1 |
| Nearside Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Handlebar mounting clamp bolt missing |2.1.1a| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Floor brake test Neither brake control achieves an efficiency of 25% |3.3.C1b| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Offside Rear Direction indicator missing |1.5.1a| | 1 |
| Front Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Nearside Front Horn control not readily accesible. |1.7.2a| | 1 |
| Outer Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Outer Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Centre Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Nearside Front Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Centre Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Rear Brake disc|s| cracked |3.2.A1g| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Inner Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Front Front position lamp insecure |1.1.1c| | 1 |
| Nearside Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Offside Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Nearside Front Fairing so located that it is likely to impede the steering |2.1.2e| | 1 |
| Centre Fuel system component insecure |7.2.1b| | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 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 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear Lower Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |