| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 49 |
| Registration plate lamp issues | 39 |
| Registration plate issues | 38 |
| Rear reflector missing (4.8.2 (a) (ii)) | 31 |
| Rear reflector on motorcycle missing |1.4.1| | 22 |
| Drive chain excessively loose |6.2.1d| | 14 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 13 |
| Rear reflector missing |4.8.2 |a| |ii|| | 11 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 9 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 7 |
| Stop lamp remains on when the brakes are released | 6 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 5 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 5 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 5 |
| Throttle operating incorrectly |6.2.1f| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 4 |
| Rear Brake excessively binding (1.2.1 (f)) | 4 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Headlamp aim not tested (4.1.2 (b)) | 3 |
| Nearside Rear Direction indicator missing (4.4.1 (a) (ii)) | 3 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Nearside Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 3 |
| Offside Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 3 |
| Rear Position lamp adversely affected by the operation of another lamp (4.2.3 (b)) | 3 |
| 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| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 3 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 3 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 3 |
| All direction indicators missing (4.4.1 (a) (ii)) | 2 |
| Nearside Rear Direction indicator obviously incorrectly positioned |4.4.3 |a|| | 2 |
| Offside Rear Direction indicator obviously incorrectly positioned |4.4.3 |a|| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Riders seat insecure (6.2.5 (a) (ii)) | 2 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Nearside Rear Direction indicator incorrect colour (4.4.3 (a)) | 2 |
| Offside Rear Direction indicator incorrect colour (4.4.3 (a)) | 2 |
| Offside Rear Footrest missing (6.2.12 (a)) | 2 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Rear Direction indicator obviously incorrectly positioned too close together (4.4.3 (a)) | 2 |
| Front Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 2 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 2 |
| Headlamp aim not tested |4.1.2 |b|| | 2 |
| Offside Rear Direction indicator with a multiple light source more than 1/2 not functioning (4.4.1 (a) (ii)) | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Nearside Rear Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Nearside Front Direction indicator adversely affected by the operation of another lamp |4.4.3 |b|| | 2 |
| Offside Footrest missing |6.2.12 |a|| | 2 |
| Front Brake master cylinder leaking |1.1.10 |b| |ii|| | 2 |
| Stop lamp emits other than a steady red light (4.3.3 (a) (ii)) | 2 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Front Direction indicator adversely affected by the operation of another lamp (4.4.3 (b)) | 1 |
| Brake hose fouling |3.2.B3b| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Front Direction indicators affected by the operation of another lamp Both front direction indicators flash with switched power to either side |1.5.1c| | 1 |
| Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Position lamp lens seriously defective |4.2.1 |b|| | 1 |
| Rear Position lamp light intensity significantly reduced |4.2.3 |a| |ii|| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Front Direction indicator affected by the operation of another lamp Staying on |1.5.1c| | 1 |
| Rear Stop lamp not working spring missing (4.3.1 (a) (ii)) | 1 |
| Drive chain worn to excess seized links |6.2.1e| | 1 |
| Front Direction indicator obviously incorrectly positioned not correct distance apart (4.4.3 (a)) | 1 |
| Nearside Front Direction indicator light intensity significantly reduced (4.4.3 (a)) | 1 |
| Offside Front Direction indicator light intensity significantly reduced (4.4.3 (a)) | 1 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Rear Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Nearside Footrest insecure (6.2.12 (a)) | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts not secure in clamp |3.2.B2c| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Nearside Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Nearside Rear Direction indicator lens defective such that the emitted light is adversely affected (4.4.1 (b) (ii)) | 1 |
| Offside Rear Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Nearside Front Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Offside Front Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Rear Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Front Wheel spindle loose |5.2.1 |c| |i|| | 1 |
| Front Brake caliper leaking bleed nipple |1.1.16 |b| |i|| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Offside Front Throttle operating incorrectly throttle swich moving with throttle |6.2.1f| | 1 |
| Rear Direction indicator obviously incorrectly positioned |4.4.3 |a|| | 1 |
| Direction indicator not working |1.5.1c| | 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 |
| Central Rear Lower Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Rear Brake hose damaged and likely to fail (1.1.12 (a)) | 1 |
| Rear Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Front Brake component inadequately mounted reservoir not mounted (1.1.21 (c)) | 1 |
| Offside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Nearside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear All direction indicators obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Rear Brake caliper inadequately mounted and braking performance affected seized (1.1.16 (c) (ii)) | 1 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Drive chain sprocket worn to excess front (6.1.7 (c) (i)) | 1 |
| Rear Brake hose leaking rear master cylinder. |1.1.12 |c|| | 1 |
| Brake performance not tested |1.2.1 |g|| | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Offside Rear Direction indicator likely to become detached |4.4.1 |c| |ii|| | 1 |
| Position lamp showing white light to the rear reg plate light showing direct white light to rear |4.2.3 |a| |ii|| | 1 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Rear All direction indicators obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Offside Rear All direction indicators obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Valve stem seriously damaged Both (5.2.3 (j)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Handlebar mounting insecure (2.2.1 (a) (i)) | 1 |
| Stop lamp adversely affected by the operation of another lamp both (4.3.3 (b)) | 1 |
| Stop lamp missing on secondary rear brake (4.3.1 (a) (ii)) | 1 |
| Handlebar grip insecure to handlebar both (2.2.1 (d) (ii)) | 1 |
| Rear Suspension arm insecurely attached swinging arm pivot slack (5.3.3 (a) (i)) | 1 |
| Rear Brake lagging in operation (1.2.1 (d)) | 1 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Rear Brake fluid reservoir fluid not visible (1.1.10 (d) (iii)) | 1 |
| Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 1 |
| Horn sound not in accordance with requirements bulb horn fitted,,, bulb horns only ok on vehicles reg before 1/8/1973 (7.7 (c)) | 1 |
| Clutch lever shortened so it cannot be readily operated (6.2.7 (b)) | 1 |
| Steering linkage locking device ineffective o/s and n/s chain adjustors (2.1.3 (d)) | 1 |
| Offside Front Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Rear Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Handlebar deformed |2.1.1b| | 1 |
| Stop lamp not working x2 |4.3.1 |a| |ii|| | 1 |
| Stop lamp does not illuminate immediately a brake applies REAR OPERATED. |1.3.1a| | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Steering headbearing excessively stiff or notchy excessively notchy (2.2.2 (f) (i)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Rear All direction indicators obviously incorrectly positioned |4.4.3 |a|| | 1 |
| Front All direction indicators obviously incorrectly positioned |4.4.3 |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 |
| Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Nearside Front Direction indicator with a multiple light source more than 1/2 not functioning (4.4.1 (a) (ii)) | 1 |
| Offside Front Direction indicator with a multiple light source more than 1/2 not functioning (4.4.1 (a) (ii)) | 1 |
| Front All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Rear All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Offside Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |
| Rear Outer Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Direction indicator missing Both (4.4.1 (a) (ii)) | 1 |
| Offside 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 |
| Front Handlebar mounting insecure (2.2.1 (a) (i)) | 1 |
| Front Direction indicator adversely affected by the operation of another lamp Both (4.4.3 (b)) | 1 |
| Exhaust markings indicating not for road use or similar wording (6.1.2 (c)) | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Direction indicator not working BOTH (4.4.1 (a) (ii)) | 1 |
| Chain guard insecure (6.1.7 (i)) | 1 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Offside Front Steering linkage locking device missing |2.1.3 |d|| | 1 |
| Front Direction indicator obviously incorrectly positioned both (4.4.3 (a)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Indicator switch inoperative |4.4.2 |a| |ii|| | 1 |
| Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Offside Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Nearside Front Suspension attachment bracket/mounting insecure bolt missing from top yoke (5.3.3 (a) (i)) | 1 |
| Stop lamp adversely affected by the operation of another lamp |4.3.3 |b|| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Clutch lever bent so it cannot be readily operated. |6.2.1g| | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| 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 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Central Inner Exhaust system insecure (6.1.2 (a)) | 1 |
| Nearside Front position lamp incorrect colour orange |1.1.2a| | 1 |
| Offside Front position lamp incorrect colour orange |1.1.2a| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Rear Brake grabbing severely (1.2.1 (c)) | 1 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Central Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Brake grabbing severely (1.2.1 (c)) | 1 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Brake pedal is bent and the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Nearside Front Horn not working |7.7 |a| |ii|| | 1 |
| Rear All direction indicators incorrect colour front indicators remain on |4.4.3 |a|| | 1 |
| Rear Brake locking device insecure rear brake caliper |3.2.A1e| | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Horn not working |1.7.3a| | 1 |
| Rear Stop lamp not working footbrake (4.3.1 (a) (ii)) | 1 |
| Exhaust silencer likely to become detached |8.1.1 |b| |ii|| | 1 |
| Drive chain horseshoe locking device incorrectly fitted wrong for direction of travel, open end against the drive (6.1.7 (j) (i)) | 1 |