| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 61 |
| Registration plate lamp issues | 15 |
| Drive chain excessively loose |6.2.1d| | 14 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Front Brake excessively binding (1.2.1 (f)) | 11 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 9 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 9 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 9 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Drive chain excessively tight |6.2.1d| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Drive chain worn to excess |6.2.1e| | 6 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 6 |
| Rear reflector on motorcycle missing |1.4.1| | 6 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 6 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Registration plate issues | 5 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 5 |
| Rear Brake excessively binding (1.2.1 (f)) | 5 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 5 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 4 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Rear reflector on motorcycle obscured |1.4.1| | 4 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 3 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 3 |
| Horn not working |1.7.3a| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Nearside Front Direction indicator insecure |1.5.3b| | 3 |
| Rear Drive chain worn to excess |6.2.1e| | 3 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Headlamp insecure (4.1.1 (c)) | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| All direction indicators not working (4.4.1 (a) (ii)) | 2 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 2 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Rear Brake pedal is bent and the brake cannot be readily applied (1.1.2 (d)) | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Nearside Handlebar deformed |2.1.1b| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 2 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 2 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Riders seat insecure (6.2.5 (a) (ii)) | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Front Brake excessively binding |1.2.1 |f|| | 2 |
| Horn not working (7.7 (a)) | 2 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Front position lamp incorrect colour |1.1.2a| | 2 |
| Rear suspension fouling which affects the movement of the rear suspension Exhaust |2.4.A.3a| | 2 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Offside Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Stop lamp does not illuminate by the operation of both brake controls lever not operating lamp (4.3.2 (a) (iii)) | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Offside Handlebar fractured |2.1.1b| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Motorcycle structure joining/attachment plate or fastening so insecure that structural rigidity is seriously reduced Grab Rail (6.1.1 (b) (ii)) | 1 |
| Offside Front Motorcycle structure inadequately repaired such that it is likely to adversely affect braking or steering Fairing Panel (6.1.1 (d) (ii)) | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Front Lower Motorcycle structure is deformed and structural rigidity is significantly reduced Belly Pan (6.1.1 (a) (i)) | 1 |
| Rear Exhaust silencer insecure Insecure Fixing (8.1.1 (b) (i)) | 1 |
| Nearside Front Motorcycle structure inadequately repaired such that structural rigidity is significantly reduced (6.1.1 (d) (i)) | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Rear Wheel spindle or securing nut(s) so insecure that wheel security or steering control is adversely affected (5.2.1 (c) (ii)) | 1 |
| Direction indicator incorrect colour both front (4.4.3 (a)) | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Direction indicator adversely affected by the operation of another lamp (4.4.3 (b)) | 1 |
| Rear Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Front Front mudguard can easily contact the wheel |2.3.7| | 1 |
| Nearside Front Footrest missing grip rubber |6.2.1a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Nearside Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 1 |
| All direction indicators obviously incorrectly positioned both fronts wedged back on mountings (4.4.3 (a)) | 1 |
| Rear Brake pedal insecure |3.1.2a| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Nearside Rear Lower Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Offside Front Upper Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Rear Brake component is excessively corroded |3.1.5| | 1 |
| Front Brake component is excessively corroded |3.1.5| | 1 |
| Rear Brake component is fractured pad friction material parting from backing plate |3.1.5| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Rear Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 1 |
| Offside Footrest insecure (6.2.12 (a)) | 1 |
| Offside Rear Direction indicator with a multiple light source more than 1/2 not functioning (4.4.1 (a) (ii)) | 1 |
| Stop lamp does not illuminate immediately a brake applies Rear brake switch needs adjustment |1.3.1a| | 1 |
| Drive chain excessively tight |6.1.7 |k| |i|| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected on right lock |6.2.7 |a| |ii|| | 1 |
| Offside Handlebar excessively deformed |2.2.1 |c| |i|| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride split link |6.2.1h| | 1 |
| Offside Front Brake fluid reservoir fluid level significantly below minimum level (1.1.10 (d) (ii)) | 1 |
| Central Front Headlamp insecure headlamp is loose in housing |1.2.3b| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Nearside Drive chain worn to excess |6.2.1e| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Nearside Front Steering operation restricted in free movement from lock to lock fouling on horn bracket (2.1.4 (c)) | 1 |
| Rear Exhaust system insecure mount broken (6.1.2 (a)) | 1 |
| Front Wheel damaged or distorted to the extent that control of the motorcycle is likely to be adversely affected three places (5.2.2 (c) (ii)) | 1 |
| Rear Footrest missing both rear missing (6.2.12 (a)) | 1 |
| All direction indicators not working All not working (4.4.1 (a) (ii)) | 1 |
| Rear All direction indicators missing missing (4.4.1 (a) (ii)) | 1 |
| Front Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Exhaust mounting missing centre mount missing |7.1.1c| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort 20 kgf deflection |3.3.A1d| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Chain guard insecure (6.1.7 (i)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Throttle operating incorrectly not returning (6.2.7 (a) (i)) | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Offside Fork yoke insecure fork tube pinch bolt loose (2.2.2 (d) (i)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected revs increase on full lock (6.2.7 (a) (ii)) | 1 |
| Rear Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Front Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Rear Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Rear Stop lamp switch with a delay in operation |4.3.2 |a| |ii|| | 1 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Nearside Direction indicator with a multiple light source more than 1/2 not functioning (4.4.1 (a) (ii)) | 1 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Offside Rear Footrest insecure locking pin missing (6.2.12 (a)) | 1 |
| Front Brake performance not tested brake seized (1.2.1 (g)) | 1 |
| Offside Front Handlebar restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Offside Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Central Front Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| An item not tested |Manual| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride split link in chain fastener fitted wrongly |6.2.1h| | 1 |
| Front Gradient brake test indicates a binding brake |3.3.D1c| | 1 |
| Stop lamp does not illuminate immediately a brake applies rear brake |1.3.1a| | 1 |
| Rear Brake lever excessively corroded |3.2.A1c| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Front Brake lining|s| less than 1.0 mm thick |1.1.13 |a|| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Offside Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Nearside Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort disc warped (1.2.1 (e)) | 1 |
| Front Brake excessively binding unable to check wheel bearings (1.2.1 (f)) | 1 |
| Rear Brake excessively binding unable to check wheel bearings (1.2.1 (f)) | 1 |
| Nearside Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride chain adjuster |6.2.1h| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Offside Front Direction indicator incorrect colour (4.4.3 (a)) | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Front Upper Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Exhaust mounting does not fully support the exhaust system Baffle loose |7.1.1.c| | 1 |
| Offside Front Shock absorber has a serious fluid leak fork (5.3.2 (b)) | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Shock absorber has a serious fluid leak both fork seals leaking |5.3.2 |b|| | 1 |
| Nearside Front Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Nearside Rear Footrest missing |6.2.12 |a|| | 1 |
| Offside Rear Footrest missing |6.2.12 |a|| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride chain split link. |6.2.1h| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort pedal pressure leaks away. |3.3.A1c| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Fuel cap mounting flange/sealing method defective |7.2.2c| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Lower Brake component is severely distorted |3.1.5| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Offside Front Motorcycle structure joining/attachment plate or fastening insecure fairing (6.1.1 (b) (i)) | 1 |
| Front Brake caliper has no reserve travel and braking performance affected (1.1.16 (e) (ii)) | 1 |
| Rear Brake caliper has no reserve travel and braking performance affected (1.1.16 (e) (ii)) | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Nearside Rear Drive chain excessively tight |6.2.1d| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Nearside Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Direction indicators not working |1.5.1c| | 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 |
| Offside Handlebar deformed |2.1.1b| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Rear Wheel bearing play so excessive it is likely to break up sprocket carrier bearing u/s causing excessive wear to chain and sprockets |5.1.3 |a| |ii|| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Stop lamp not working From front brake control (4.3.1 (a) (ii)) | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Offside Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Rear All direction indicators obviously incorrectly positioned |4.4.3 |a|| | 1 |
| Fuel cap leaking (6.1.3 (b) (i)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Roller brake test indicates a sticking brake (3.3.A1a) | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Offside Front Handlebar deformed |2.1.1b| | 1 |
| Rear Brake pedal mounting insecure |3.1.2a| | 1 |
| Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 1 |
| Offside Rear Footrest missing (6.2.12 (a)) | 1 |
| Nearside Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Offside Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Nearside Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |