| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 27 |
| Registration plate issues | 16 |
| Drive chain excessively loose |6.2.1d| | 15 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Horn not working |1.7.3a| | 9 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 5 |
| Rear Brake disc|s| cracked |3.2.A1g| | 5 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 4 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 3 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front position lamp incorrect colour |1.1.2a| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| 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|| | 2 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| 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| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear Drive chain excessively tight |6.2.1d| | 2 |
| Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear brake disc in such a condition that it is seriously weakened | 2 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Headlamp aim not tested (4.1.2 (b)) | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 2 |
| Rear Suspension arm likely to fail rear suspension seized (5.3.3 (b) (ii)) | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Clutch lever positioned so it cannot be readily operated |6.2.7 |b|| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Offside Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Headlamp aim not tested led bulbs fitted-no testable pattern (4.1.2 (b)) | 1 |
| Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Nearside Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Offside Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Centre Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front Brake lever is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Nearside Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Nearside Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Nearside Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Drive chain horseshoe locking device likely to become detached |6.1.7 |j| |ii|| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front wheel spindle securing nut|s| loose |2.3.5a| | 1 |
| Rear Brake hose leaking fluid |3.2.B4| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Nearside Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Offside Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Exhaust markings indicating not for road use or similar wording (6.1.2 (c)) | 1 |
| Suspension component pin or bush excessively worn Linkage to shock bearing (5.3.4 (a) (i)) | 1 |
| Rear Exhaust is leaking and excessively noisey (7.1.1b) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 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 |
| Suspension component pin or bush likely to become detached shocker lower linkage all bushes in dog link (5.3.4 (a) (ii)) | 1 |
| Handlebar handgrip not secure to handlebars. Both side`s. |2.1.1c| | 1 |
| Front shock absorber seal failed and leaking oil l/h |2.3.3| | 1 |
| Front shock absorber seal failed and leaking oil r/h |2.3.3| | 1 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Nearside Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Nearside Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Offside Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak fork stanchion (5.3.2 (b)) | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Front All position lamps not working (4.2.1 (a)) | 1 |
| Nearside Front Lower Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Front Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Rear Brake disc fractured |1.1.14 |a| |ii|| | 1 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Front Brake component inadequately mounted (1.1.21 (c)) | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Nearside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Horn missing |1.7.1| | 1 |
| Offside Exhaust has part of the system missing exhaust clamp missing |7.1.1a| | 1 |
| Headlamp insecure bulb loose |1.2.3b| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Brake disc significantly and obviously worn cracked (1.1.14 (a) (i)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front Stop lamp does not emit a steady light brake |1.3.1b| | 1 |
| Front Brake lever is so short that the brake cannot be readily applied |1.1.2 |d|| | 1 |
| Rear suspension bearing excessively deteriorated |2.4A.2a|i|| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Nearside Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Front wheel has a loose wheel bolt|s| |4.2.3a| | 1 |
| Rear Brake disc fractured (1.1.14 (a) (ii)) | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front shock absorber seal failed and leaking oil Both Front Leaking Oil, O/S Leaking Oil on to caliper |2.3.3| | 1 |
| Front Horn not working (7.7 (a)) | 1 |
| Rear Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Drive chain excessively tight |6.1.7 |k| |i|| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Rear Suspension component pin or bush excessively worn shock linkage (5.3.4 (a) (i)) | 1 |
| Front Stop lamp not working Control (4.3.1 (a) (ii)) | 1 |
| Nearside Front Brake disc contaminated fork oil |1.1.14 |b|| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Rear Brake fluid significantly below minimum mark |1.1.10 |d| |ii|| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Central Front Headlamp aim not tested low beam bulb not working |4.1.2 |b|| | 1 |
| Central Rear Position lamp not working |4.2.1 |a|| | 1 |
| Central Rear Stop lamp not working both on front and rear brake not working |4.3.1 |a| |ii|| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Headlamp switch insecure |1.2.4| | 1 |
| Rear Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Offside Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Offside Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Rear Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Nearside Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |