| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 40 |
| Drive chain excessively loose |6.2.1d| | 15 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 11 |
| Registration plate issues | 11 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 10 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Front wheel bearings have excessive free play |2.3.5b| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Throttle operating incorrectly |6.2.1f| | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Drive chain excessively tight |6.2.1d| | 5 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear reflector on motorcycle missing |1.4.1| | 4 |
| Rear Drive chain excessively loose |6.2.1d| | 4 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Exhaust excessively deteriorated |7.1.1a| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| 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| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 3 |
| Rear Brake locking device missing |3.2.A1e| | 3 |
| 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 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 1 |
| Offside Rear Footrest missing (6.2.12 (a)) | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Nearside Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Offside Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. swingarm rotted through brace next to brake arm mount. |2.4.A.2d| | 1 |
| Offside Front Motorcycle structure cracked riders footrest mount is cracked but appears to be secure. |6.1.1a| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Fairing so located that it is likely to impede the steering |2.1.2e| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Rear Brake pedal is bent and the brake cannot be readily applied pedal fouling exhaust when applied |3.1.3c| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride chain split link incorrectly fitted |6.2.1h| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride split pin missing from rear torque arm |6.2.1h| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Nearside Rear Drive chain excessively tight |6.2.1d| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Offside Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Stop lamp not working REAR CONTROL (4.3.1 (a) (ii)) | 1 |
| Position lamp lens seriously defective LED FLASHING (4.2.1 (b)) | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Front Upper All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Nearside Rear Upper All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Central Rear Lower Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| An item not tested |Manual| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Nearside Front Brake caliper insecure bolt loose |1.1.16 |c| |i|| | 1 |
| Offside Front Brake caliper insecure bolt loose |1.1.16 |c| |i|| | 1 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Stop lamp with a multiple light source more than 1/2 not functioning stop switch required adjusting (4.3.1 (a) (ii)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Nearside Front Front position lamp incorrect colour |1.1.2a| | 1 |
| Offside Front Front position lamp incorrect colour |1.1.2a| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Nearside Front Front position lamp insecure |1.1.1c| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Centre Front Upper Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Centre Front Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Front Upper Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Centre Rear Upper Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Centre Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Rear Exhaust system insecure (6.1.2 (a)) | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Front Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Nearside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Offside Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Nearside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies front stop light switch |1.3.1a| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Footrest missing |6.2.1a| | 1 |
| Nearside Rear Rear suspension component loose |2.4.A.1a| | 1 |
| Offside Rear Rear suspension component loose |2.4.A.1a| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Nearside Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Offside Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Offside Front Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Footrest missing |6.2.12 |a|| | 1 |
| Rear Drive chain excessively tight, so that it is likely to fail |6.1.7 |k| |ii|| | 1 |
| Centre Rear Upper Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Brake pipe inadequately supported |3.2.B2b| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Brake component is excessively corroded |3.1.5| | 1 |
| Centre Rear Upper Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Exhaust excessively deteriorated Leaking at front four into one joint |7.1.1a| | 1 |
| Offside Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Position lamp switch faulty |1.1.4a| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Headlamp aim beam image too far to the right |1.6.4| | 1 |
| Fairing insecure and likely to impede the steering |2.1.2e| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Stop lamp not working front brake (4.3.1 (a) (ii)) | 1 |
| Throttle operating incorrectly throttle sticks on right hand lock |6.2.1f| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. left hand grip loose |2.1.1c| | 1 |
| Front brake disc in such a condition that it is seriously weakened | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Clutch lever positioned so it cannot be readily operated (6.2.7 (b)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Lower Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Drive chain excessively loose and is worn |6.2.1d| | 1 |
| Front Brake lever attachment screws loose |3.1.2b| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Front Brake caliper inadequately mounted (1.1.16 (c) (i)) | 1 |
| Front Shock absorber has a serious fluid leak fork seals leaking. (5.3.2 (b)) | 1 |
| Exhaust silencer insecure (8.1.1 (b) (i)) | 1 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |