| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 30 |
| Steering headbearing has excessive free play |2.2.2| | 11 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 7 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 6 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 6 |
| Rear brake binding | 5 |
| Parking brake: efficiency below requirements |3.7.B.7| | 5 |
| Horn not working |1.6.2a| | 4 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 4 |
| Rear parking brake recording little or no effort | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Brake performance not tested |3.7.A.1| | 3 |
| Offside front brake binding |3.7.B.1| | 3 |
| Horn not working |1.7.3a| | 3 |
| Rear Mechanical brake component has restricted free movement | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 3 |
| Windscreen wiper does not clear the windscreen effectively | 3 |
| Registration plate lamp issues | 3 |
| Offside rear brake recording little or no effort |3.7.B.5a| | 3 |
| Service brake: efficiency below requirements |3.7.B.7| | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Direction indicators not working |1.4.A.2c| | 3 |
| Fuel system component leaking |7.2.3| | 2 |
| Parking brake: efficiency below requirements |3.7.C.1b| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Offside Front Wheel insecure |4.2.A.1c| | 2 |
| Rear Exhaust system not adequately supported |7.1.1| | 2 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Brakes imbalanced across an axle | 2 |
| Offside Rear Direction indicator not working |1.4.A.2c| | 2 |
| Offside Stop lamp not working |1.2.1b| | 2 |
| Offside Rear Footrest insecure |6.2.1a| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Fuel hose leaking |7.2.1a| | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Offside Front Front wheel bearing has excessive play |2.5.A.3c| | 2 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 2 |
| Front wheel spindle loose |2.3.5a| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Front suspension assembly component loose |2.3.1| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Offside Headlamp not working on main beam |1.7.5a| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Service brake: efficiency below requirements |3.7.C.1a| | 1 |
| Nearside Front Track rod end ball joint dust cover missing |2.2.C.1c| | 1 |
| Offside Front Track rod end ball joint dust cover missing |2.2.C.1c| | 1 |
| Centre Exhaust has a major leak of exhaust gases |7.1.2| | 1 |
| Rear Exhaust has a major leak of exhaust gases |7.1.2| | 1 |
| Front Brake lever is inoperative |3.1.3c| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| Nearside Front front brake grabbing severely |3.7.A.2b| | 1 |
| Offside Front Front suspension has a loose unit in the upper support bearing assembly |2.5.B.3b| | 1 |
| Nearside Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 1 |
| Offside Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 1 |
| Offside Steering rack gaiter split |2.2.D.2d| | 1 |
| Offside Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings floor |6.1.B.2| | 1 |
| Driver`s seat insecure |6.2.A.1| | 1 |
| Offside Steering rack gaiter missing or no longer prevents the ingress of dirt (2.1.3 (g) (ii)) | 1 |
| Nearside Front Service brake excessively fluctuating (1.2.1 (e)) | 1 |
| Offside Front Service brake excessively fluctuating (1.2.1 (e)) | 1 |
| Dipswitch operation does not extinguish all main beam headlamps leaving at least one pair of dipped beam headlamps |1.7.4b| | 1 |
| Nearside Front Direction indicator not working |1.4.A.2c| | 1 |
| Nearside Rear Direction indicator not working |1.4.A.2c| | 1 |
| Nearside Front Upper Suspension arm locating pin locking device missing |2.4.G.3b| | 1 |
| Offside Steering arm has relative movement at its fixings |2.2.B.1h| | 1 |
| Front Brake pipe inadequately clipped |3.6.B.1| | 1 |
| Brake cable locking device insecure |3.5.1l| | 1 |
| Front Fuel system component insecure |7.2.1| | 1 |
| Parking brake lever, pawl mechanism pivot|s| retaining device insecure |3.1.4b| | 1 |
| Nearside Front Direction indicators not working |1.4.A.2c| | 1 |
| Offside Front Direction indicators not working |1.4.A.2c| | 1 |
| Nearside Rear Direction indicators not working |1.4.A.2c| | 1 |
| Offside Rear Direction indicators not working |1.4.A.2c| | 1 |
| Nearside Front Passenger`s seat insecure |6.2.A.1| | 1 |
| Nearside Steering arm has relative movement at its fixings |2.2.B.1h| | 1 |
| Upper Fuel cap sealing washer torn |7.2.2c| | 1 |
| Offside Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Horn not working when lights on |1.7.3a| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Nearside Front Body has a sharp edge caused by corrosion |6.1.C.1| | 1 |
| Nearside Front Body has a sharp edge caused by damage |6.1.C.1| | 1 |
| Parking brake lever ratchet mechanism is broken |3.1.5| | 1 |
| Nearside Rear Radius arm attachment bracket/mounting insecure |2.4.G.1| | 1 |
| Front Brake component is fractured |3.1.5| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Offside Front Upper Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Stop lamp(s) not working (4.3.1 (a) (ii)) | 1 |
| Nearside Steering rack gaiter missing or no longer prevents the ingress of dirt (2.1.3 (g) (ii)) | 1 |
| Dipswitch operation does not deflect all main beam headlamps to make them dipped beams (4.1.3 (b)) | 1 |
| Nearside Parking (secondary brake) on a single line braking system has inadequate effort at a wheel (1.3.1 (a) (i)) | 1 |
| Nearside Rear Service brake excessively binding (1.2.1 (f)) | 1 |
| Nearside Front Headlamp not working on main beam |1.7.5a| | 1 |
| Offside Front Headlamp not working on main beam |1.7.5a| | 1 |
| Nearside Vehicle structure has an inadequate repair, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 1 |
| Suspension component mounting prescribed area is excessively corroded |2.4.A.3| | 1 |
| Offside Indicator tell tale inoperative |1.4.A.2a| | 1 |
| Offside Front Direction indicator not working |1.4.A.2c| | 1 |
| Nearside front brake binding |3.7.B.1| | 1 |
| Offside Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d| | 1 |
| Dipswitch operation does not deflect all main beam headlamps to make them dipped beams |1.7.4b| | 1 |
| Fuel cap sealing washer torn |7.2.2c| | 1 |
| Nearside Front Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 1 |
| Front wheel spindle securing nut|s| loose |2.3.3a| | 1 |
| Offside Front Suspension arm has excessive play in a ball joint |2.4.G.2| | 1 |
| Nearside Front Brake hose leaking |3.6.A.1| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Front Brake lining|s| contaminated by oil or grease |3.2.A1k| | 1 |
| Brake pedal creeps down while the pedal is held under pressure |3.3.B.1a| | 1 |
| Parking brake lever has no reserve travel |3.1.6b| | 1 |
| Nearside Front brake disc contaminated by grease |3.5.1h| | 1 |
| Offside Front brake disc contaminated by grease |3.5.1h| | 1 |
| Nearside Front Front wheel bearing has excessive play |2.5.A.3c| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Exhaust excessively deteriorated |7.1.1a| | 1 |
| Offside Front suspension assembly component loose seal bolt |2.3.1| | 1 |
| Front Horn control defective |1.7.2a| | 1 |
| Front Position lamp switch faulty |1.1.4a| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Nearside Front suspension assembly component loose |2.3.1| | 1 |
| Offside Front suspension assembly component loose |2.3.1| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Front Fuel pipe union leaking |7.2.1a| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Front Brake cable has a significantly damaged outer casing. |3.2.A1b| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Brake back plate|s| insecure |3.2.A1j| | 1 |
| Nearside Front Drag link end ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt |2.2.C.1c| | 1 |
| Offside Front Drag link end ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt |2.2.C.1c| | 1 |
| Nearside Front Upper Ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt |2.2.C.1c| | 1 |
| Offside Front Upper Ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt |2.2.C.1c| | 1 |
| Nearside Front Wheel insecure |4.2.A.1c| | 1 |
| Steering box has relative movement between sector shaft and the drop arm |2.2.B.1b| | 1 |
| Offside Rear Wheel insecure |4.2.A.1c| | 1 |
| Nearside Front Brake pipe fouled by moving parts |3.6.B.2a| | 1 |
| Offside Front Brake pipe fouled by moving parts |3.6.B.2a| | 1 |
| Front Exhaust has a major leak of exhaust gases |7.1.2| | 1 |
| Nearside Front wheel bearing has excessive play |2.5.A.3c| | 1 |
| Exhaust emits clearly visible black smoke during acceleration |7.3.A.2c| | 1 |
| Nearside Front Brake hose twisted |found during steering lock to lock check| |2.2.D.2b| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Front suspension assembly component loose |2.3.1| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Intermediate drop arm fractured and unserviceable |2.2.C.1d| | 1 |
| Nearside Front Road wheel bead rim badly distorted |4.2.A.1a| | 1 |
| Nearside Front Steering arm has relative movement at its fixings |2.2.B.1h| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Horn control not readily accesible. |1.7.2a| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Brake lever attachment screws loose |3.1.2b| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Registration plate issues | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Nearside Stop lamp not working |1.2.1b| | 1 |
| Offside Front brake caliper has restricted free movement |3.5.1k| | 1 |
| Front passenger door cannot be opened from outside the vehicle |6.2.B.1b| | 1 |
| Front Brake lever mounting insecure |3.1.2a| | 1 |
| Horn missing |1.7.1| | 1 |
| Front Built up wheel has a loose bolt/s |4.2.1c| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Offside Front front brake binding |3.7.B.1| | 1 |
| Centre Rear Leaf spring saddle is moving relative to the spring |2.4.B.7a| | 1 |
| Front brake disc excessively pitted |3.5.1h| | 1 |
| Exhaust has a major leak of exhaust gases |7.1.2| | 1 |
| Indicator switch faulty does not stop on off side |1.4.A.1| | 1 |
| Nearside Front Track rod end ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt |2.2.C.1c| | 1 |
| Offside Front Track rod end ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt |2.2.C.1c| | 1 |
| Nearside Front Front suspension has excessive play in a lower suspension ball joint |2.5.B.1a| | 1 |
| Offside Front Front suspension has excessive play in a lower suspension ball joint |2.5.B.1a| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Rear Footrest insecure Securing bolt lose |6.2.12 |a|| | 1 |
| Nearside Front suspension assembly component missing |2.3.1| | 1 |
| Rear Rear reflector on sidecar missing |1.4.1| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Nearside Front Service brake indicates brake bind |3.7.D.2a| | 1 |
| Nearside Headlamp not working on dipped beam |1.7.5a| | 1 |
| Offside Headlamp not working on dipped beam |1.7.5a| | 1 |
| Nearside Headlamp not working on main beam |1.7.5a| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Fuel tank insecure |6.1.3 |a| |i|| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Horn sound not in accordance with requirements |7.7 |c|| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Headlamp aim not tested |4.1.2 |b|| | 1 |
| Offside Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Brake fluid reservoir insecurely mounted |3.2.B1a| | 1 |
| Rear Brake fluid reservoir cap missing |3.2.B1c| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Offside Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear wheel insecure |4.2.3b| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Front Brake lever attachment screws loose |3.1.2b| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Front Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 1 |
| Offside Front Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 1 |
| Fuel cap/sealing device sealing washer deteriorated |7.2.4c| | 1 |
| Nearside Front Upper Suspension arm has excessive play in a ball joint |2.4.G.2| | 1 |
| Nearside rear brake grabbing severely |3.7.A.5b| | 1 |
| Nearside front brake grabbing severely |3.7.A.2b| | 1 |
| Offside front brake grabbing severely |3.7.A.2b| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Brake cable badly frayed |3.2.A1b| | 1 |
| Nearside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |