| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 27 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 11 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Horn not working |1.7.3a| | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Registration plate issues | 3 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Headlamp switch insecure |1.2.4| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Centre Front Upper Steering headbearing has excessive free play |2.2.2| | 2 |
| Nearside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Centre Horn not working |1.7.3a| | 1 |
| Nearside Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Front Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Rear Wheel more than one fixing missing (5.2.1 (a) (ii)) | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Front Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Nearside Rear Direction indicator not working New bulb inserted. (4.4.1 (a) (ii)) | 1 |
| Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 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 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Brake pedal is inoperative |3.1.3c| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Offside Front Upper Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Offside Front Lower Footrest insecure |6.2.1a| | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear Wheel spindle locking device missing (5.2.1 (d)) | 1 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 1 |
| Headlamp aim projected beam image obviously incorrect beam kick up to the right (4.1.2 (c)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Stop lamp not working |Foot Brake| |4.3.1 |a| |ii|| | 1 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Front Brake cylinder severely damaged |3.2.B1b| | 1 |
| Rear Drive belt excessively loose. |6.2.1d| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Front Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Nearside Rear Chain guard insecure |6.2.1c| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Brake lever insecure (1.1.2 (e) (i)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Headlamp light intensity severely reduced Main beam (4.1.4 (a)) | 1 |
| Brake component defective due to a deliberate modification which significantly reduces the original strength front pads |3.1.5| | 1 |
| Front wheel insecure front wheel bearings |4.2.3b| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Offside Front Shock absorber has a serious fluid leak fork |5.3.2 |b|| | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |
| Rear Position lamp light intensity significantly reduced |4.2.3 |a| |ii|| | 1 |
| Rear reflector defective or damaged by more than 50% of the reflecting surface |4.8.1 |a| |ii|| | 1 |
| Nearside Rear All direction indicators light intensity significantly reduced |4.4.3 |a|| | 1 |
| Brake pedal has insufficient reserve travel |1.1.2 |a|| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Nearside Rear Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Rear Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Nearside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Rear Lower Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Rear Lower Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Offside Rear 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 |
| Offside Rear Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Offside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Rear Motorcycle structure cracked |6.1.1a| | 1 |
| Offside Indicator switch insecure |1.5.4| | 1 |
| Nearside Headlamp switch insecure |1.2.4| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 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 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Footrest insecure |6.2.1a| | 1 |