| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 46 |
| Registration plate lamp issues | 24 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 11 |
| Stop lamp remains on when the brakes are released | 9 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 8 |
| Drive chain excessively loose |6.2.1d| | 8 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 8 |
| Registration plate issues | 6 |
| Horn not working (7.7 (a)) | 6 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 6 |
| Rear Brake excessively binding (1.2.1 (f)) | 5 |
| Brake hose excessively deteriorated | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 5 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 4 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 3 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 3 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 3 |
| Horn not working |1.7.3a| | 3 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 3 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Rear Brake excessively binding |1.2.1 |f|| | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Brake lever excessively worn (1.1.15 (b)) | 2 |
| Brake lever pivot excessively worn (1.1.1 (b)) | 2 |
| Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Suspension arm pin or bush excessively worn rear swinging arm excessive movement (5.3.4 (a) (i)) | 2 |
| Shock absorber has a serious fluid leak right hand rear (5.3.2 (b)) | 2 |
| Front Brake lagging in operation |1.2.1 |d|| | 2 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 2 |
| Front Position lamp not working |4.2.1 |a|| | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Rear Drive chain sprocket so loose it is likely to fail |6.1.7 |c| |ii|| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 2 |
| Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 2 |
| Offside Front Position lamp not working (4.2.1 (a)) | 2 |
| Rear Drive chain sprocket so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Nearside Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 2 |
| Offside Rear Footrest missing (6.2.12 (a)) | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Front Brake lever is so short that the brake cannot be readily applied |1.1.2 |d|| | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 2 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Brake lever pivots excessively worn |3.1.3a| | 1 |
| Rear brake binding | 1 |
| Offside Steering lock stop maladjusted when turning right |2.1.3| | 1 |
| Fuel system component leaking carb |6.1.3 |b| |i|| | 1 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Nearside Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Fuel tank leaking excessively or a risk of fire (6.1.3 (b) (ii)) | 1 |
| Rear Suspension arm attachment bracket/mounting insecure engine nut o/s (5.3.3 (a) (i)) | 1 |
| Stop lamp adversely affected by the operation of another lamp (4.3.3 (b)) | 1 |
| Handlebar deformed to the extent that steering is affected (2.2.1 (c) (ii)) | 1 |
| Brake clevis joint excessively worn Rear brake pedal (1.1.15 (b)) | 1 |
| Steering headbearing in such a condition that steering control is adversely affected |2.2.2 |f| |ii|| | 1 |
| Clutch lever bent so it cannot be readily operated |6.2.7 |b|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Drive chain sprocket carrier worn to excess CUSH DRIVE EXCESSIVE PLAY |6.2.1e| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride rear sprocket insecure |6.2.1h| | 1 |
| Motorcycle structure is so deformed it is likely to adversely affect braking or steering frame & forks/wheel not aligned (6.1.1 (a) (ii)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Front Handlebar deformed to the extent that steering is affected (2.2.1 (c) (ii)) | 1 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Drive chain worn to excess carrier bearing (6.1.7 (c) (i)) | 1 |
| Rear Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Front Brake component insecure disc pad pin retaining clip missing (1.1.21 (c)) | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride rear sprocket nut tab washers |6.2.1h| | 1 |
| Nearside Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Front Wheel spindle loose incorrectly fitted. offside |5.2.1 |c| |i|| | 1 |
| Rear Drive chain sprocket carrier worn to excess sprocket loose |6.2.1e| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Brake fluid reservoir severely corroded |3.2.B1b| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Headlamp light intensity severely reduced (4.1.4 (a)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Offside Front Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Nearside Front Direction indicator light intensity significantly reduced (4.4.3 (a)) | 1 |
| Nearside Rear Direction indicator light intensity significantly reduced (4.4.3 (a)) | 1 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Forks excessively deformed Front forks not compressing as they should, causing front suspension to have minimal/severely stiff movement (2.2.2 (d) (i)) | 1 |
| Rear Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Offside Front Headlamp insecure Bolt not long enough to secure headlight unit! |1.2.3b| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Brake fluid reservoir fluid level significantly below minimum level |1.1.10 |d| |ii|| | 1 |
| Drive chain sprocket so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Offside Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Steering headbearing excessively stiff or notchy centering (2.2.2 (f) (i)) | 1 |
| Offside Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Front brake disc in such a condition that it is seriously weakened | 1 |
| Brake performance not tested Front master cylinder leaking (1.2.1 (g)) | 1 |
| Rear Suspension arm ball joint excessively worn swing arm movment |5.3.4 |a| |i|| | 1 |
| Rear Brake grabbing severely |1.2.1 |c|| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| All direction indicators adversely affected by the operation of another lamp (4.4.3 (b)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Front Brake disc insecure securing bolt missing (1.1.14 (a) (ii)) | 1 |
| Rear Footrest missing Double seat, no seat grab handle or footrests fitted for pillion! (6.2.12 (a)) | 1 |
| Brake lever is so short that the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Brake lever insecure (1.1.2 (e) (i)) | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Central Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 1 |
| Central Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Central Rear Brake cylinder operating mechanism has excessive travel (1.1.16 (e) (i)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected rpm increasing when turned to right (6.2.7 (a) (ii)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Suspension component pin or bush excessively worn Swing arm bolt loose (5.3.4 (a) (i)) | 1 |
| Nearside Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Front Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Nearside Rear Lower Drive chain worn to excess |6.2.1e| | 1 |
| Nearside Rear Lower Drive chain excessively loose |6.2.1d| | 1 |
| Central Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Stop lamp does not illuminate immediately a brake applies control 1 |1.3.1a| | 1 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Rear Wheel fixing missing |multiple fixings| |5.2.1 |a| |i|| | 1 |
| Rear Brake pedal is bent and the brake cannot be readily applied |1.1.2 |d|| | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Rear Direction indicator with a multiple light source more than 1/2 not functioning (4.4.1 (a) (ii)) | 1 |
| Nearside Rear Lower Locking devices not correctly fitted which may make the motor bicycle dangerous to ride rear sprocket fastening nut missing |6.2.1h| | 1 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Offside Front Wheel fixing missing (multiple fixings) (5.2.1 (a) (i)) | 1 |
| Nearside Front Position lamp not working (4.2.1 (a)) | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Brake component insecure Brake pin missing (1.1.21 (c)) | 1 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Suspension component ball joint excessively worn Rear swinging arm bushes excessively worn/loose (5.3.4 (a) (i)) | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Drive chain sprocket carrier worn to excess and loose |6.2.1e| | 1 |
| Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Fuel cap leaking (6.1.3 (b) (i)) | 1 |
| Rear Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 1 |
| Nearside Rear Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Front Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Drive chain sprocket so loose it is likely to fail Cush hub (6.1.7 (c) (ii)) | 1 |
| Front Shock absorber has a serious fluid leak Both (5.3.2 (b)) | 1 |
| Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Suspension arm ball joint excessively worn |5.3.4 |a| |i|| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Brake lagging in operation when brake lever applied (1.2.1 (d)) | 1 |
| Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Handlebar deformed to the extent that steering is affected are misaligned (2.2.1 (c) (ii)) | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Suspension arm insecure and control of the motorcycle impaired |5.3.3 |a| |ii|| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Stop lamp emits other than a steady red light From rear brake control (4.3.3 (a) (ii)) | 1 |
| Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Brake pedal pivot excessively worn |1.1.1 |b|| | 1 |
| Fuel system component leaking (6.1.3 (b) (i)) | 1 |
| Rear Brake pedal is bent and the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Rear Footrest missing Pillion Pegs Missing (6.2.12 (a)) | 1 |
| Front Brake component insecure Pad Pin Retaining Clip Missing (1.1.21 (c)) | 1 |
| Drive chain sprocket so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Brake hose excessively damaged |1.1.12 |b| |ii|| | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls front brake (4.3.2 (a) (iii)) | 1 |
| Nearside Front Forks in such a condition that steering control is adversely affected hits fuel tank (2.2.2 (d) (ii)) | 1 |
| Nearside Rear Pillion seat insecure grab rail lose (6.2.6 (a) (ii)) | 1 |
| Offside Front Brake lever insecure bolt lose lock nut missing (1.1.2 (e) (i)) | 1 |
| Front Wheel alignment incorrect which adversely affects the handling forks out of alinment (2.4 (a)) | 1 |
| Footrest missing Both Passenger (6.2.12 (a)) | 1 |
| Rear Brake caliper operating mechanism has excessive travel |1.1.16 |e| |i|| | 1 |
| Front Stop lamp switch with a delay in operation |4.3.2 |a| |ii|| | 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 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Steering headbearing excessively stiff or notchy notch in center (2.2.2 (f) (i)) | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Rear Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front Brake disc contaminated greasy residue contaminating brake disc |1.1.14 |b|| | 1 |
| Front Stop lamp not working stop lamp not working from front brake |4.3.1 |a| |ii|| | 1 |
| Stop lamp does not illuminate immediately a brake applies rear brake |1.3.1a| | 1 |
| Stop lamp does not emit a steady light front brake |1.3.1b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride chain link clip |6.2.1h| | 1 |
| Front Wheel fixing loose (single fixing) (5.2.1 (a) (ii)) | 1 |
| Nearside Rear Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Drive chain sprocket so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Front Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Front Position lamp not working |4.2.1 |a|| | 1 |
| Front Wheel has a missing rivet/s or bolts 1x spindle pinch bolt broken off |5.2.2 |e| |i|| | 1 |
| Roller brake test No brake control achieves an efficiency of 30% |1.2.2 |a| |i|| | 1 |
| Brake component leaking fluid front master cylinder |3.2.B4| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on number plate lamp |1.1.3a| | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Front Brake fluid reservoir fluid not visible (1.1.10 (d) (iii)) | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride Rear Sprocket loose |6.2.1h| | 1 |
| Rear Drive chain sprocket excessively loose has bolt missing |6.1.7 |c| |i|| | 1 |
| Nearside Front Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Rear Suspension arm pin or bush excessively worn swing arm bushings |5.3.4 |a| |i|| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Handlebar excessively deformed (2.2.1 (c) (i)) | 1 |
| Suspension arm ball joint excessively worn swinging arm loose (5.3.4 (a) (i)) | 1 |
| Rear Brake component insecure rear brake cam bolt missing (1.1.21 (c)) | 1 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected |1.1.2 |b| |ii|| | 1 |
| Offside Front Forks in such a condition that steering control is adversely affected left hand fork leg bent |2.2.2 |d| |ii|| | 1 |
| Handlebar fouling on the fuel tank or bodywork on full lock |2.1.4 |b|| | 1 |
| Direction indicators flashing more than 120 times per minute all |1.5.1c| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |