| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 27 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 25 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 15 |
| Steering headbearing has excessive free play |2.2.2| | 14 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 11 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 9 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 6 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 5 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 5 |
| Riders seat insecure (6.2.5 (a) (ii)) | 4 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Horn not working |1.7.3a| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Registration plate issues | 4 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Rear Brake lever insecure |3.1.2a| | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Exhaust mounting missing |7.1.1c| | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Front mudguard can easily contact any fixed point of the motor bicycle. |2.3.7| | 2 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 2 |
| Brake hose excessively deteriorated | 2 |
| Rear Brake effort inadequate at a wheel |1.2.1 |a| |i|| | 2 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 2 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Front Brake caliper|s| insecure |3.2.A1j| | 2 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 2 |
| Handlebar so insecure it is likely to become detached (2.2.1 (b) (ii)) | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Nearside Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Rear Brake lagging in operation |1.2.1 |d|| | 2 |
| Brake excessively binding |1.2.1 |f|| | 2 |
| Front Wheel fractured |5.2.2 |a|| | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Headlamp aim not tested (4.1.2 (b)) | 1 |
| Front Brake fluid reservoir fluid not visible (1.1.10 (d) (iii)) | 1 |
| Front Brake master cylinder defective but brake still operating Glass broken (1.1.10 (b) (i)) | 1 |
| Offside Front Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Rear Brake lever has insufficient reserve travel lever pulls back to bars (1.1.2 (a)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension exhaust hitting panel |2.4.A.3a| | 1 |
| Upper Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Headlamp insecure |4.1.1 |c|| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Rear Rear position lamp insecure |1.1.1c| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Motorcycle structure is so deformed it is likely to adversely affect braking or steering kick start fouling main stand and ground |6.1.1 |a| |ii|| | 1 |
| Rear Brake lever has restricted free movement (1.1.15 (e)) | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Brake master cylinder leaking |1.1.10 |b| |ii|| | 1 |
| Stop lamp not working front switch |4.3.1 |a| |ii|| | 1 |
| Shock absorber has an excessively worn bush front lower |5.3.2 |c|| | 1 |
| Shock absorber has negligible damping effect rear |5.3.2 |b|| | 1 |
| Brake lever has inadequate reserve travel rear |3.1.3b| | 1 |
| Brake lever has inadequate reserve travel Rear |3.1.3b| | 1 |
| Stop lamp does not illuminate immediately a brake applies front switch |1.3.1a| | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Front Brake caliper insecurely mounted and braking performance affected (1.1.16 (c) (ii)) | 1 |
| Stop lamp not working front brake |4.3.1 |a| |ii|| | 1 |
| Brake reaction bracket excessively worn upper & lower mount |1.1.15 |b|| | 1 |
| Rear Upper Suspension component pin or bush excessively worn |5.3.4 |a| |i|| | 1 |
| Rear Wheel fixing loose |single fixing| |5.2.1 |a| |ii|| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Nearside Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Front Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Centre Front Front suspension fouling which affects the movement of the front suspension. |2.3.6a| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear Brake lever is inoperative |3.1.3c| | 1 |
| Centre Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Front Suspension component modified so the suspension is inoperative |5.3.3 |c| |ii|| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Rear Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Offside Front Motorcycle structure joining/attachment plate or fastening insecure lower front bodywork insecure |6.1.1 |b| |i|| | 1 |
| Horn sound not in accordance with requirements quiet |7.7 |c|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| All position lamps not working |4.2.1 |a|| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Stop lamp not working FRONT AND REAR (4.3.1 (a) (ii)) | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Headlamp light intensity severely reduced (4.1.4 (a)) | 1 |
| Headlamp light source and lamp not compatible (4.1.4 (c)) | 1 |
| Rear Shock absorber insecurely attached (5.3.2 (a) (i)) | 1 |
| Offside Front Brake master cylinder leaking (1.1.10 (b) (ii)) | 1 |
| Brake excessively binding (1.2.1 (f)) | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Front Suspension component modified so the suspension is inoperative (5.3.3 (c) (ii)) | 1 |
| Roller brake test No brake control achieves an efficiency of 30% (1.2.2 (a) (i)) | 1 |
| Front Brake cylinder damaged (1.1.16 (a) (i)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Front Brake performance not tested (1.2.1 (g)) | 1 |
| Front suspension assembly excessive wear or free play in a front suspension component linkage front bush |2.3.4| | 1 |
| Brake reaction bracket insecure top bush worn |3.2.A1j| | 1 |
| Rear suspension bush has excessive free play top bush |2.4.A2a|i|| | 1 |
| Exhaust is leaking and excessively noisey exhaust down pipe to cylinder |7.1.1b| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front suspension has excessive stiffness in the suspension movement. sieezed solid |2.3.6b| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Handlebar mounting so insecure that steering is adversely affected (2.2.1 (a) (ii)) | 1 |
| Nearside Brake lever has abnormal movement of levers indicating excessive wear or maladjustment (1.1.15 (f)) | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Stop lamp not working rear control |4.3.1 |a| |ii|| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Suspension component modified so the suspension is inoperative not possible to compress front suspension (5.3.3 (c) (ii)) | 1 |
| Rear Shock absorber has negligible damping effect no damping found in suspension (5.3.2 (b)) | 1 |
| Rear Direction indicator incorrect colour both rear turn signals no real amber colour found, mainly white light (4.4.3 (a)) | 1 |
| Offside Front Shock absorber insecurely attached r/h front shock top mounting securing nylock nut not reaching thread. (5.3.2 (a) (i)) | 1 |
| Nearside Brake lever has insufficient reserve travel rear brake lever insufficient reserve travel. (1.1.2 (a)) | 1 |
| Central Front Headlamp light source and lamp not compatible led bulb fitted, no beam found, or difference between dip or main beam. (4.1.4 (c)) | 1 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 1 |
| Offside Rear Footrest missing (6.2.12 (a)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Front Brake caliper|s| insecure bush worn |3.2.A1j| | 1 |
| Front Brake back plate|s| insecure bush worn |3.2.A1j| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Brake lever has abnormal movement of levers indicating excessive wear or maladjustment (1.1.15 (f)) | 1 |
| Offside Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Brake master cylinder leaking |1.1.10 |b| |ii|| | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Engine mounting/bracket damaged or deteriorated resulting in excessive movement |6.1.8 |a| |i|| | 1 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Nearside Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Brake has no recorded effort at a wheel Not adjusted correctly (1.2.1 (a) (ii)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Rear Wheel fixing loose (single fixing) (5.2.1 (a) (ii)) | 1 |
| Nearside Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Offside Rear Footrest insecure (6.2.12 (a)) | 1 |
| Rear wheel insecure |4.2.3b| | 1 |
| Offside Front Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Nearside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Rear Stop lamp does not illuminate immediately a brake applies Fitted new switch |1.3.1a| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Upper Rear suspension bush has excessive free play shock absorber |2.4.A2a|i|| | 1 |
| Front Brake locking device insecure |3.2.A1e| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Front Brake master cylinder severely damaged Fluid level window broken |3.2.B1b| | 1 |
| Headlamp light source and lamp not compatible |4.1.4 |c|| | 1 |
| Front Wheel bearing play so excessive that directional control is impaired |5.1.3 |a| |ii|| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Throttle operating incorrectly sticking |6.2.1f| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Indicator switch inoperative (4.4.2 (a) (ii)) | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Rear Brake lever has inadequate reserve travel brake |3.1.3b| | 1 |
| Front Brake master cylinder leaking (1.1.10 (b) (ii)) | 1 |
| Front Brake master cylinder defective but brake still operating (1.1.10 (b) (i)) | 1 |
| Front Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Rear Direction indicator adversely affected by the operation of another lamp (4.4.3 (b)) | 1 |
| Nearside Rear Footrest missing pillion (6.2.12 (a)) | 1 |