| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 50 |
| Horn not working |1.7.3a| | 11 |
| Drive chain excessively loose |6.2.1d| | 11 |
| Rear reflector on motorcycle missing |1.4.1| | 11 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 10 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 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| | 7 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Headlamp insecure |1.2.3b| | 6 |
| Steering headbearing has excessive free play |2.2.2| | 6 |
| Nearside Rear Footrest missing |6.2.1a| | 6 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Offside Rear Footrest missing |6.2.1a| | 5 |
| Handlebar deformed |2.1.1b| | 5 |
| Rear Footrest missing |6.2.1a| | 5 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 5 |
| Offside Rear Direction indicators not working |1.5.1c| | 5 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Front suspension has inadequate damping effect. |2.3.6c| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 2 |
| Front Brake hose leaking fluid |3.2.B4| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 2 |
| An item not tested |Manual| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Headlamp switch faulty |1.2.4| | 2 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front Direction indicator not working |1.5.1c| | 2 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Brake reaction bracket insecure |3.2.A1j| | 2 |
| Nearside Steering lock stop missing |2.1.3| | 2 |
| Offside Steering lock stop missing |2.1.3| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Fuel hose leaking |7.2.1a| | 2 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Offside Exhaust excessively deteriorated |7.1.1a| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Front Wheel spoke excessively corroded |4.2.1b| | 1 |
| Rear Wheel spoke excessively corroded |4.2.1b| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Registration plate lamp issues | 1 |
| Rear Lower Suspension component pin or bush excessively worn shock absorber linkage (5.3.4 (a) (i)) | 1 |
| Offside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear 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 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Brake master cylinder insecure (1.1.10 (c)) | 1 |
| Front Brake lever insecure (1.1.2 (e) (i)) | 1 |
| All direction indicators obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Headlamp light intensity severely reduced (4.1.4 (a)) | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 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 Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Central Rear Position lamp not working (4.2.1 (a)) | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Nearside Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Front Brake component leaking fluid |3.2.B4| | 1 |
| Central Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Fuel hose leaking (6.1.3 (b) (i)) | 1 |
| Suspension component ball joint excessively worn lower pivot linkage bushes and top shock and loer bushes (5.3.4 (a) (i)) | 1 |
| Rear Footrest missing |6.2.12 |a|| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Central Front Fuel cap sealing washer missing |7.2.2c| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Brake caliper|s| insecure locking washers insecure |3.2.A1j| | 1 |
| Rear Brake locking device missing rear brake rod insecure split pin missing |3.2.A1e| | 1 |
| Front Footrest insecure 2 bolts missing |6.2.1a| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Front Brake pipe union leaking fluid |3.2.B4| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Front Horn not working |1.7.3a| | 1 |
| Nearside Front Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Nearside Front Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Offside Front Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Centre Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Offside Front Throttle operating incorrectly |6.2.1f| | 1 |
| Offside Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Rear Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Front Shock absorber has a serious fluid leak both seals blown (5.3.2 (b)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Nearside Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Offside Front mudguard insecure |2.3.7| | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride chain adjusters |6.2.1h| | 1 |
| Rear Lower Locking devices not correctly fitted which may make the motor bicycle dangerous to ride lock nut missing |6.2.1h| | 1 |
| Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride spindle nut insucure |6.2.1h| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Brake linkage clevis joint excessively worn |3.2.A1d| | 1 |
| Front Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Registration plate issues | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Front Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Offside Front Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Offside Front Brake cylinder insecure bolt missing from master cylinder (1.1.16 (c) (i)) | 1 |
| Central Front Fork yoke insecure (2.2.2 (d) (i)) | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Footrest insecure |6.2.1a| | 1 |
| Centre Upper Fuel system component insecure |7.2.1b| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Offside Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Offside Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Rear Lower Brake locking device missing |3.2.A1e| | 1 |
| Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Lower Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Front suspension assembly component missing |2.3.1| | 1 |
| Offside Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Footrest missing |6.2.1a| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Brake lever attachment screws missing |3.1.2b| | 1 |
| Brake pedal insecure |3.1.2a| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Brake hose excessively deteriorated | 1 |
| Front Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Floor brake test indicates a binding brake Front Brake Binding |3.3.C2c| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Lower Suspension arm likely to fail (5.3.3 (b) (ii)) | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Fuel cap mounting flange/sealing method defective |7.2.2c| | 1 |
| Nearside Fuel system component leaking |7.2.1a| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Steering lock stop missing |2.1.3| | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Position lamp not working (4.2.1 (a)) | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Fuel system component leaking excessively or a risk of fire |6.1.3 |b| |ii|| | 1 |
| Headlamp aim not tested |4.1.2 |b|| | 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 |
| Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Exhaust mounting missing |7.1.1c| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Front Indicator tell tale not operating correctly |1.5.2| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Footrest insecure |6.2.1a| | 1 |
| Front Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Nearside Footrest missing |6.2.1a| | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Stop lamp switch with a delay in operation handle bar (4.3.2 (a) (ii)) | 1 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Rear Brake back plate|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Throttle operating incorrectly sticking |6.2.1f| | 1 |
| Handlebar handgrip not secure to handlebars. both |2.1.1c| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Nearside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |