| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 35 |
| Registration plate lamp issues | 15 |
| Rear reflector missing (4.8.2 (a) (ii)) | 14 |
| Rear reflector on motorcycle missing |1.4.1| | 14 |
| Registration plate issues | 13 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 8 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 6 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 6 |
| Rear reflector missing |4.8.2 |a| |ii|| | 5 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 5 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear Wheel spindle locking device missing (5.2.1 (d)) | 3 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition (8.1.1 (a)) | 3 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Offside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 3 |
| Horn not working |1.7.3a| | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Offside Front Position lamp not working (4.2.1 (a)) | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Stop lamp adversely affected by the operation of another lamp Indicators (4.3.3 (b)) | 1 |
| Rear Wheel fixing missing (single fixing) Spindle split-pin (5.2.1 (a) (ii)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Front Stop lamp not working Switch failure |4.3.1 |a| |ii|| | 1 |
| Rear Wheel excessively damaged (5.2.2 (c) (i)) | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Rear Wheel fixing missing (single fixing) split pin missing (5.2.1 (a) (ii)) | 1 |
| Central Front Brake excessively binding both brakes |1.2.1 |f|| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected throttle sticks on full right hand lock (6.2.7 (a) (ii)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Riders seat with a defective supporting structure (6.2.5 (a) (i)) | 1 |
| Drive chain worn to excess seized links (6.1.7 (c) (i)) | 1 |
| Nearside Rear Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Nearside Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Handlebar restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front suspension assembly component excessively bent forks |2.3.1| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 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 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Central Lower Exhaust system insecure (6.1.2 (a)) | 1 |
| Rear Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition |8.1.1 |a|| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Front Brake lagging in operation (1.2.1 (d)) | 1 |
| Nearside Rear Footrest insecure (6.2.12 (a)) | 1 |
| Rear Stop lamp switch with a delay in operation not working at all (4.3.2 (a) (ii)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Offside Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Fuel cap mounting flange/sealing method defective |7.2.2c| | 1 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Upper Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Rear Stop lamp missing |1.3.3a| | 1 |
| All direction indicators obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Brake disc contaminated (1.1.14 (b)) | 1 |
| Brake lining(s) contaminated (1.1.13 (b)) | 1 |
| Offside Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Direction indicator flashing more than 120 times per minute all |1.5.1c| | 1 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Front Direction indicator damaged and function impaired both |1.5.3a| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Front Steering lock stop missing replaced |2.1.3| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Nearside Headlamp insecure |1.2.3b| | 1 |
| Front Stop lamp does not emit a steady light stop light goes out when fully pulled on |1.3.1b| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Lower Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear Brake hose leaking |1.1.12 |c|| | 1 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders operation of the controls brake lever |2.1.2b| | 1 |
| Front Stop lamp switch with a delay in operation |4.3.2 |a| |ii|| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Throttle operating incorrectly sticks |6.2.1f| | 1 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Horn not working (7.7 (a) (ii)) | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Central Front Exhaust excessively deteriorated |7.1.1a| | 1 |
| Central Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Stop lamp not working front brake light just flashing ,not showing a steady light (4.3.1 (a) (ii)) | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Motorcycle structure corroded to the extent that the rigidity of the assembly is significantly reduced swing arm (6.1.1 (c) (i)) | 1 |
| Stop lamp not working Front brake light not working (4.3.1 (a) (ii)) | 1 |
| Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Nearside Front Upper Shock absorber has a serious fluid leak Fork Seal Leaking Oil On The Leg (5.3.2 (b)) | 1 |
| Central Rear Upper Brake hose excessively twisted Brake Hose From Master Cylinder is set at extreme angle under tension (1.1.12 (b) (ii)) | 1 |
| Offside Rear Lower Stop lamp not working Rear Brake Light Not Working (4.3.1 (a) (ii)) | 1 |
| Brake hose damaged | 1 |
| Central Rear Upper Position lamp likely to become detached Rear Light Bracket Held On One Side And Not The Other Insecure (4.2.1 (c) (ii)) | 1 |
| Central Front Brake excessively binding Brakes Front Binding Badly (1.2.1 (f)) | 1 |
| Offside Front Throttle operating incorrectly Throttle hard to close (6.2.7 (a) (i)) | 1 |
| Nearside Rear Wheel spindle or securing nut|s| so insecure that wheel security or steering control is adversely affected split pin missing |5.2.1 |c| |ii|| | 1 |
| Central Front Lower Brake excessively binding Front Brake Binding And Fluctuating Possible Seized Caliper (1.2.1 (f)) | 1 |
| Central Rear Direction indicator obviously incorrectly positioned Indicators Both Groped together to close
Mandatory direction indicators must have minimum separation distances between the illuminating surfaces of:
solo motorcycles - 240mm at the front and 180mm at the rear (4.4.3 (a)) | 1 |
| Front Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Brake pedal cannot be released smoothly siezed pivot |3.1.3d| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Drive chain excessively loose chain excessively loose (6.1.7 (c) (i)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected throttle sticking (6.2.7 (a) (ii)) | 1 |
| Rear Wheel bearing play so excessive it is likely to break up sprocket carrier bearing (5.1.3 (a) (ii)) | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Front Brake locking device missing brake lever locking device |3.2.A1e| | 1 |
| Nearside Front Direction indicator missing |1.5.1a| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Central Front Fuel cap ineffective does not open |6.1.3 |b| |i|| | 1 |
| Nearside Rear Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Nearside Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Nearside Rear Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 1 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 1 |
| Drive chain excessively loose has tight spots (6.1.7 (c) (i)) | 1 |
| Central Front Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Handlebar mounting insecure (2.2.1 (a) (i)) | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Nearside Front Position lamp not working (4.2.1 (a)) | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Stop lamp remains on when the brake is released pedal sticking |1.3.1e| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Stop lamp remains on when the brake is released brake control 2 foot brake |1.3.1e| | 1 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |