| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 54 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 14 |
| Rear reflector on motorcycle missing |1.4.1| | 13 |
| Horn not working |1.7.3a| | 13 |
| Registration plate issues | 13 |
| Steering headbearing has excessive free play |2.2.2| | 11 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 10 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 9 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 9 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 8 |
| Fuel cap sealing washer torn |7.2.2c| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 7 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 7 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 7 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 6 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 5 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Front wheel bearings are excessively rough |2.3.5b| | 5 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Handlebar mounting clamp loose |2.1.1a| | 4 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 4 |
| Front Position lamp not working (4.2.1 (a)) | 4 |
| Brake hose excessively deteriorated | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear position lamp insecure |1.1.1c| | 3 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 3 |
| Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| An item not tested |Manual| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| All direction indicators not working (4.4.1 (a) (ii)) | 3 |
| Offside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Nearside Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 2 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Brake hose damaged | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Offside Rear Direction indicator insecure |1.5.3b| | 2 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Direction indicator not working |1.5.1c| | 2 |
| Rear Direction indicator not working |1.5.1c| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Front Front mudguard insecure |2.3.7| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Rear Rear wheel has a loose wheel nut|s| |4.2.3a| | 2 |
| Front Brake hose excessively twisted |3.2.B3a| | 2 |
| Rear position lamp damaged and function impaired |1.1.1b| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Offside Front Steering lock stop ineffective |2.1.3| | 2 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Indicator switch defective |1.5.4| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Rear Brake lagging in operation (1.2.1 (d)) | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Horn sound not in accordance with requirements (7.7 (c)) | 2 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Brake excessively binding Rear brake sticks intermittently after loading. suspect loose lining |1.2.1 |f|| | 1 |
| Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Rear Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Front Brake lever pivots excessively worn |3.1.3a| | 1 |
| Nearside Rear Fairings so located that it is likely to impede the steering |2.1.2e| | 1 |
| Nearside Front Upper Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Offside Front Upper Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Front Upper Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Rear Lower Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Fuel cap ineffective seal broken |6.1.3 |b| |i|| | 1 |
| Dipswitch does not operate immediately when selected on main beam switch wired wrong way round |4.1.3 |b|| | 1 |
| Front Brake hose damaged and likely to fail |1.1.12 |a|| | 1 |
| Front Steering headbearing in such a condition that steering control is adversely affected |2.2.2 |f| |ii|| | 1 |
| Front Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Central Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Nearside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Brake hose excessively kinked |3.2.B3a| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Brake lever has inadequate reserve travel rear |3.1.3b| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Rear Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Fairings insecure and likely to impede the steering front mudguard stay broken |2.1.2e| | 1 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Front Headlamp light intensity severely reduced Dip beam |4.1.4 |a|| | 1 |
| Centre Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Centre Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Valve stem seriously damaged perished |5.2.3 |j|| | 1 |
| Front Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front An item not tested |Manual| | 1 |
| Rear An item not tested |Manual| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Rear Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Position lamp switch faulty |1.1.4a| | 1 |
| Rear Upper Exhaust mounting missing |7.1.1c| | 1 |
| Nearside Front Headlamp switch faulty |1.2.4| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Front Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Steering linkage has excessive free play |2.2.2| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Centre Steering headbearing has excessive free play |2.2.2| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Front Handlebar mounting clamp loose |2.1.1a| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Floor brake test Neither brake control achieves an efficiency of 25% |3.3.C1b| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Rear wheel rotation likely to be impeded mudguard loose |6.2.1b| | 1 |
| Stop lamp insecure |1.3.3b| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Nearside Front Brake component is fractured |3.1.5| | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Offside Rear Upper Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Offside Indicator switch defective |1.5.4| | 1 |
| Front mudguard can easily contact the wheel |2.3.7| | 1 |
| Nearside Rear Direction indicator damaged and function impaired shows white light |1.5.3a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Throttle operating incorrectly not returning fully |6.2.1f| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Position lamp switch insecure |1.1.4b| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Roller brake test No brake control achieves an efficiency of 30% |1.2.2 |a| |i|| | 1 |
| All position lamps do not illuminate immediately when switched on front and rear |1.1.3a| | 1 |
| Front wheel spindle loose |2.3.3a| | 1 |
| Nearside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Central Front Handlebar deformed |2.1.1b| | 1 |
| Central Front Front suspension assembly component excessively bent STEERING STEM BENT |2.3.1| | 1 |
| Central Front Lower Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Rear All position lamps not working (4.2.1 (a)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Front Brake lever is bent and the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Offside Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Handlebar mounting so insecure that steering is adversely affected handle bars insecure (2.2.1 (a) (ii)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Rear Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Handlebar so insecure it is likely to become detached (2.2.1 (b) (ii)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Nearside Steering operation fouling on the fuel tank or bodywork on full lock bodywork (2.1.4 (b)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Steering operation linkage fouling when handlebars turned from lock to lock (2.1.4 (a)) | 1 |
| Front Wheel spindle or securing nut(s) so insecure that wheel security or steering control is adversely affected (5.2.1 (c) (ii)) | 1 |
| Rear Brake lever has insufficient reserve travel adjusted. (1.1.2 (a)) | 1 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Central Rear Brake grabbing severely (1.2.1 (c)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Rear Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Nearside Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Rear Shock absorber has an excessively worn bush Upper bush (5.3.2 (c)) | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls Neither control working (4.3.2 (a) (iii)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Front Headlamp aim not tested (4.1.2 (b)) | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Throttle operating incorrectly tick over too high (6.2.7 (a) (i)) | 1 |
| Fuel cap ineffective seal deteriorated (6.1.3 (b) (i)) | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Direction indicator lens defective such that the emitted light is adversely affected glass broken (4.4.1 (b) (ii)) | 1 |