| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 33 |
| Drive chain excessively loose |6.2.1d| | 20 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 14 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 12 |
| Rear 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 shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Rear reflector on motorcycle missing |1.4.1| | 10 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 9 |
| Headlamp aim beam image kick up to the offside |1.6| | 7 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 6 |
| Drive chain worn to excess |6.2.1e| | 6 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 5 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Rear Brake locking device missing |3.2.A1e| | 5 |
| Horn not working |1.7.3a| | 5 |
| Drive chain excessively tight |6.2.1d| | 5 |
| Registration plate issues | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 3 |
| Fuel system component leaking |7.2.1a| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 3 |
| Front Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Front position lamp missing |1.1.1a| | 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 Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Offside Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Rear Brake hose which buldges |3.2.B4| | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear Brake master cylinder insecurely mounted |3.2.B1a| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear Brake hose leaking fluid |3.2.B4| | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Rear Suspension component mounting has an unsafe modification (5.3.3 (c) (i)) | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Offside Front suspension assembly component loose |2.3.1| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Nearside Rear Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Rear Lower Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Front Brake component leaking fluid |3.2.B4| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Offside Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Brake caliper insecurely mounted and braking performance affected Mounting bolts loose |1.1.16 |c| |ii|| | 1 |
| Front Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Shock absorber has a serious fluid leak fork seals |5.3.2 |b|| | 1 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Centre Fuel tank leaking |7.2.1a| | 1 |
| Centre Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Rear Rear position lamp does not illuminate immediately when it is switched on Tail light bulb out |1.1.3a| | 1 |
| 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| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front Direction indicators not working both |1.5.1c| | 1 |
| Front Shock absorber has a serious fluid leak both |5.3.2 |b|| | 1 |
| Centre Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Centre Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Centre Rear Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Offside Handlebar deformed |2.1.1b| | 1 |
| Offside Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Front Brake fluid significantly below minimum mark |1.1.10 |d| |ii|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear 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 |
| Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Centre Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Offside Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Fairings so located that it is likely to impede the steering |2.1.2e| | 1 |
| Front Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Front Brake lever pivots excessively worn |3.1.3a| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Shock absorber has a serious fluid leak offside and nearside. (5.3.2 (b)) | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Offside Steering lock stop maladjusted |2.1.3| | 1 |
| Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Front Steering lock stop missing |2.1.3| | 1 |
| Floor brake test indicates a sticking brake slight sticking |3.3.C2c| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Outer Rear Lower Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Outer Rear Lower Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Central Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Nearside Handlebar fouling on the fuel tank or bodywork on full lock |2.1.4 |b|| | 1 |
| Nearside Handlebar excessively deformed |2.2.1 |c| |i|| | 1 |
| Rear Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Nearside Indicator tell tale not functioning |1.5.2| | 1 |
| Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Centre Front Headlamp incorrect colour |1.2.1| | 1 |
| Centre Front Horn not working |1.7.3a| | 1 |
| Offside Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Rear suspension component loose |2.4.A.1a| | 1 |
| Centre Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Rear An item not tested |Manual| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Nearside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Brake pipe excessively damaged |3.2.B2a| | 1 |
| Nearside Upper Handlebar mounting clamp bolt missing |2.1.1a| | 1 |
| Offside Upper Handlebar mounting clamp bolt missing |2.1.1a| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Front suspension assembly component missing |2.3.1| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Offside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Offside Front Brake disc|s| securing bolt|s| loose |3.2.A1g| | 1 |
| Offside Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Front shock absorber seal failed and leaking oil (2.3.3) | 1 |
| Front wheel bearings have excessive free play (2.3.5b) | 1 |
| Front wheel bearings are excessively rough (2.3.5b) | 1 |
| Offside Rear Direction indicator not working (1.5.1c) | 1 |
| Front Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Rear Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Front Hydraulic brake control creeps under load. |3.1.4a| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Stop lamp does not illuminate immediately a brake applies Rear pedal switch |1.3.1a| | 1 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| All direction indicators obviously incorrectly positioned |4.4.3 |a|| | 1 |
| Nearside Rear Direction indicator not working not working correctly |4.4.1 |a| |ii|| | 1 |
| Offside Rear Direction indicator not working not working correctly |4.4.1 |a| |ii|| | 1 |
| Rear Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Suspension arm pin or bush excessively worn suspension linkage |5.3.4 |a| |i|| | 1 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Throttle operating incorrectly revs rise on left hand lock |6.2.7 |a| |i|| | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride no split pin in brake anchor |6.2.1h| | 1 |
| Offside Front Lower Front suspension assembly component loose front spindle lock bolt loose |2.3.1| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Front Lower Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |