| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 21 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 7 |
| Drive chain excessively loose |6.2.1d| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Rear reflector on motorcycle missing |1.4.1| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 3 |
| Rear reflector on motorcycle obscured |1.4.1| | 3 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Chain guard insecure |6.2.1c| | 3 |
| Rear reflector on motorcycle obscured |1.4.2b| | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Horn not working |1.7.3a| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Front Footrest insecure |6.2.1a| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 2 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Riders seat insecure (6.2.5 (a) (ii)) | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Registration plate issues | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Steering lock stop ineffective |2.1.3| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride split link fitted on wrong side of chain and wrong direction |6.2.1h| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Front position lamp incorrect colour |1.1.2a| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Nearside Front Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Nearside Rear Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Central Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Central Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Offside Front Steering lock stop ineffective |2.1.3| | 1 |
| Offside Rear Brake linkage has abnormal movement due to maladjustment excessive moment |3.2.A1i| | 1 |
| Nearside Front Brake locking device insecure locking nut flap not secured over nut |3.2.A1e| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Rear Footrest missing Both (6.2.12 (a)) | 1 |
| Exhaust system insecure (6.1.2 (a)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Chain guard insecure |6.1.7 |i|| | 1 |
| Nearside Rear Direction indicator likely to become detached |4.4.1 |c| |ii|| | 1 |
| Rear Motorcycle structure is so deformed it is likely to adversely affect braking or steering |6.1.1 |a| |ii|| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Headlamp light intensity severely reduced (4.1.4 (a)) | 1 |
| Engine mounting/bracket excessively loose (6.1.8 (a) (ii)) | 1 |
| Rear Footrest missing Rear foot rests missing (6.2.12 (a)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear Suspension arm pin or bush excessively worn Swinging arm mount movement (5.3.4 (a) (i)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Rear Brake pedal has insufficient reserve travel too much travel on pedal (1.1.2 (a)) | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front Brake lever has inadequate reserve travel pulls back to bars |3.1.3b| | 1 |
| Throttle operating incorrectly sticks open |6.2.1f| | 1 |
| Clutch lever positioned so it cannot be readily operated. no pivot bolt fitted,hole in lever worn through |6.2.1g| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Rear Brake component has an inadequate repair rear brake arm barrel missing,tape and cable tie holding rod on to arm |3.1.5| | 1 |
| Rear Brake locking device missing torque arm split pin missing |3.2.A1e| | 1 |
| Front Stop lamp damaged and function impaired not working |1.3.3a| | 1 |
| Rear Stop lamp damaged and function impaired not working |1.3.3a| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride clip on split link worn |6.2.1h| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride rear sprocket nut loose |6.2.1h| | 1 |
| Fuel cap mounting flange/sealing method defective |7.2.2c| | 1 |
| Headlamp aim headlamp damaged and function impaired no beam to test |1.2.3a| | 1 |
| Steering linkage has excessive free play front yoke nuts loose. |2.2.2| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Brake pedal has inadequate reserve travel foot brake |3.1.3b| | 1 |
| Rear Plate brake test indicates a severely grabbing brake |3.3.B1b| | 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 |
| Steering operation fouling on the fuel tank or bodywork on full lock on right lock (2.1.4 (b)) | 1 |
| Motorcycle structure joining/attachment plate or fastening insecure |6.1.1 |b| |i|| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Offside Motorcycle structure joining/attachment plate or fastening insecure side panel (6.1.1 (b) (i)) | 1 |
| Offside Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Offside Handlebar deformed |2.1.1b| | 1 |
| Central Rear Rear reflector reflecting white to the rear (4.8.2 (a) (ii)) | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Offside Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Nearside Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick no reserve travel in pedal and brake adjustment fully adjusted |3.2.A1f|i|| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Throttle operating incorrectly twist open both ways no stop |6.2.1f| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp both hi and low beam operate at same time |1.2.2b|i|| | 1 |
| Front Lower Brake hose leaking fluid banjo bolt to calipre not secure |3.2.B4| | 1 |
| Brake pedal is inoperative excessive travel |3.1.3c| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Wheel alignment incorrect which adversely affects the handling requires adjustment to left |2.5.1| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Brake rod has restricted free movement |1.1.15 |e|| | 1 |
| Stop lamp does not illuminate immediately a brake applies hand |1.3.1a| | 1 |
| Stop lamp does not illuminate immediately a brake applies foot |1.3.1a| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Rear Wheel more than one fixing loose (5.2.1 (a) (ii)) | 1 |
| Offside Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Direction indicator insecure both |1.5.3b| | 1 |
| Handlebar mounting clamp bolt loose both |2.1.1a| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Front suspension has a modification which reduces the strength of a load bearing member or its supporting structure. |2.3.8| | 1 |
| Front suspension assembly component missing |2.3.1| | 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 locking device missing |3.2.A1e| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Offside Handlebar mounting clamp loose |2.1.1a| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Central Rear Wheel spindle or securing nut(s) so insecure that wheel security or steering control is adversely affected (5.2.1 (c) (ii)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Offside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Central Front Headlamp insecure |1.2.3b| | 1 |
| Central Front Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |