| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 17 |
| Rear reflector on motorcycle missing |1.4.1| | 11 |
| Registration plate issues | 9 |
| Front wheel bearings have excessive free play |2.3.5b| | 7 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 7 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| 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| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Fuel system component insecure |7.2.1b| | 2 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Horn control defective |1.7.2a| | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear wheel spindle securing nut locking device missing (2.4.A.2b) | 2 |
| Horn not working |1.7.3a| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Nearside Front Brake hose stretched by suspension movement |3.2.B3b| | 1 |
| Offside Front Brake hose stretched by suspension movement |3.2.B3b| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Nearside Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Nearside Fuel pipe leaking |7.2.1a| | 1 |
| Front Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Headlamp main beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Braking system does not have an approriate system/s fitted according to its age |3.1.1| | 1 |
| Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Rear Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Exhaust excessively deteriorated |7.1.1a| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Front Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Offside Rear Brake pipe likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear Brake pedal insecure |3.1.2a| | 1 |
| Front Steering lock stop missing |2.1.3| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Brake disc|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Offside Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Nearside Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Upper Direction indicators not working |1.5.1c| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Front Front position lamp missing |1.1.1a| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Nearside Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Offside Fuel hose leaking |7.2.1a| | 1 |
| Rear position lamp insecure all tail lights |1.1.1c| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Brake lever attachment screws loose |3.1.2b| | 1 |
| Front Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Front Horn control not readily accesible. |1.7.2a| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Centre Fuel system component leaking |7.2.1a| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Nearside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Wheel spindle or securing nut|s| so insecure that wheel security or steering control is adversely affected not cottered |5.2.1 |c| |ii|| | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Direction indicator missing |1.5.1a| | 1 |
| Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Offside Upper Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Centre Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front Hydraulic brake control creeps under load. |3.1.4a| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Stop lamp does not illuminate immediately a brake applies rear operated |1.3.1a| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Rear Brake pipe inadequately supported |3.2.B2b| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Fork yoke deformed |2.1.1b| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Headlamp light intensity severely reduced |4.1.4 |a|| | 1 |
| Headlamp lens seriously defective |4.1.1 |b| |ii|| | 1 |
| Offside Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Nearside Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Front Brake caliper operating mechanism has excessive travel |1.1.16 |e| |i|| | 1 |
| Fuel system component leaking Carburettor float bowls leaking. |6.1.3 |b| |i|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Front Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Rear suspension bearing has excessive free play (2.4.A2a(i)) | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.5.1) | 1 |
| Horn not loud enough to be heard by another road user (1.7.3a) | 1 |
| Fuel pipe union leaking (6.1.3 (b) (i)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Stop lamp affected by the operation of another lamp (1.3.2) | 1 |
| Rear Roller brake test indicates a sticking brake (3.3.A1a) | 1 |
| Rear Brake hose connection leaking at banjo fitting (1.1.12 (c)) | 1 |