| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 46 |
| Headlamp aim beam image kick up to the offside |1.6| | 13 |
| Horn not working |1.7.3a| | 9 |
| Drive chain excessively loose |6.2.1d| | 9 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 9 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 8 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 8 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 8 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Registration plate issues | 6 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Throttle operating incorrectly |6.2.1f| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 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| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Registration plate lamp issues | 3 |
| Rear Brake disc|s| is excessively distorted |3.2.A1m| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 3 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 2 |
| Nearside Direction indicators not working |1.5.1c| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Offside Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Central Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Chain guard insecure |6.2.1c| | 2 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 2 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Rear Floor brake test indicates a sticking brake brake light remains on |3.3.C2c| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Rear suspension bearing has excessive free play Suspension linkage |2.4.A2a|i|| | 1 |
| Nearside Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Offside Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Front Valve stem seriously damaged perished excessively (5.2.3 (j)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Nearside Direction indicator not working nearside front and back not working |4.4.1 |a| |ii|| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Chain guard insecure (6.1.7 (i)) | 1 |
| Offside Handlebar deformed to the extent that steering is affected (2.2.1 (c) (ii)) | 1 |
| Offside Front Direction indicator lens defective such that the emitted light is adversely affected (4.4.1 (b) (ii)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Position lamp likely to become detached (4.2.1 (c) (ii)) | 1 |
| Suspension component pin or bush excessively worn lower rear shock pivot bearing/sleeve |5.3.4 |a| |i|| | 1 |
| Steering headbearing excessively stiff or notchy excessively notchy |2.2.2 |f| |i|| | 1 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition |8.1.1 |a|| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Front suspension assembly component loose |2.3.1| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Front Stop lamp missing switch missing |1.3.3a| | 1 |
| Stop lamp not working Front brake switch replaced |4.3.1 |a| |ii|| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Horn not working (7.7 (a)) | 1 |
| Offside Handlebar deformed |2.1.1b| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Nearside Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Offside Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Rear Shock absorber has negligible damping effect rear shock does not operate correctly (5.3.2 (b)) | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Nearside Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Front Brake disc|s| excessively worn bobbins |3.2.A1l| | 1 |
| Nearside Rear Motorcycle structure cracked footpeg |6.1.1a| | 1 |
| Stop lamp does not illuminate immediately a brake applies not working on rear control |1.3.1a| | 1 |
| Lower Rear mono-shock pivot excessively worn shock mount |2.4.B.4| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Lower Rear suspension bush has excessive free play Shock absorber |2.4.A2a|i|| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Offside Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Suspension component attachment bracket/mounting damaged and seriously weakened shocker lower mounting (5.3.3 (b) (i)) | 1 |
| Rear Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Motorcycle structure is fractured and structural rigidity is significantly reduced front near exhaust headers (6.1.1 (a) (i)) | 1 |
| Front Motorcycle structure inadequately repaired such that structural rigidity is significantly reduced near exhaust headers (6.1.1 (d) (i)) | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Lower Rear mono-shock pivot excessively worn shockabsorber |2.4.B.4| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Brake disc|s| insecure |3.2.A1g| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Exhaust system insecure Clamp loose |6.1.2 |a|| | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Suspension component attachment bracket/mounting corroded and seriously weakened rear shock absorber lower mounting |5.3.3 |b| |i|| | 1 |
| Offside Rear Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Direction indicator flashing more than 120 times per minute all |1.5.1c| | 1 |
| Offside Front Brake hose leaking fluid |3.2.B4| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Brake cylinder insecurely mounted |3.2.B1a| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Lower Suspension arm ball joint excessively worn (5.3.4 (a) (i)) | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Front Brake fluid reservoir insecurely mounted |3.2.B1a| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Lower Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Front Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Brake performance not tested |3.3| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Rear Drive chain excessively tight Tight links on chain |6.2.1d| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Brake pedal anti-slip provision loose (1.1.2 (c)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake pedal anti-slip provision missing brake lever rubber missing (1.1.2 (c)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Drive chain horseshoe locking device likely to become detached rivot broken |6.1.7 |j| |ii|| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Nearside Rear Position lamp not working (4.2.1 (a)) | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Centre Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Chain guard insecure |6.2.1c| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Fork yoke deformed |2.1.1b| | 1 |
| Nearside Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Offside Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front Steering headbearing excessively stiff or notchy stiff and notchy (2.2.2 (f) (i)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls rear not working (4.3.2 (a) (iii)) | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |