| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 63 |
| Registration plate issues | 17 |
| Horn not working |1.7.3a| | 13 |
| Drive chain excessively loose |6.2.1d| | 11 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 11 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Headlamp aim beam image kick up to the offside |1.6| | 8 |
| Registration plate lamp issues | 7 |
| Drive chain worn to excess |6.2.1e| | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 5 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Headlamp insecure |1.2.3b| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Drive chain excessively tight |6.2.1d| | 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 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Rear Brake excessively binding (1.2.1 (f)) | 3 |
| Rear Exhaust markings indicating not for road use or similar wording |7.1.4| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 2 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 2 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Position lamp not working |4.2.1 |a|| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Offside Rear Rear wheel bearing has excessive play |2.6.2| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Offside Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Handlebar mounting excessively deteriorated |flexible type| |2.1.1d| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Brake cylinder severely corroded |3.2.B1b| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Offside Rear Direction indicator not working offside rear flasher not working |4.4.1 |a| |ii|| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Offside Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Front Brake component leaking fluid |3.2.B4| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake pivot has restricted free movement |1.1.15 |e|| | 1 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Centre Rear Lower Wheel spoke missing |4.2.1b| | 1 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Horn sound not in accordance with requirements |7.7 |c|| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Direction indicator flashing more than 120 times per minute Approx 180 times/min |1.5.1c| | 1 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Nearside Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Front Footrest missing |6.2.1a| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Stop lamp with a multiple light source more than 1/2 not functioning Rear bulb blown and replaced |4.3.1 |a| |ii|| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Headlamp not working on main beam also cuts out engine |4.1.1 |a| |ii|| | 1 |
| All direction indicators not working all and interfering with other lights |4.4.1 |a| |ii|| | 1 |
| Shock absorber has a serious fluid leak both forks leaking |5.3.2 |b|| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen unable to check |4.1.2 |a|| | 1 |
| Stop lamp not working With front brake |4.3.1 |a| |ii|| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Brake master cylinder defective but brake still operating |1.1.10 |b| |i|| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Front Wheel spoke cracked |5.2.2 |d|| | 1 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Front Wheel spoke missing |4.2.1b| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Stop lamp does not illuminate immediately a brake applies rear brake |1.3.1a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Brake performance not tested |3.7.A.1| | 1 |
| Hazard warning switch faulty |1.4.B.1d| | 1 |
| Rear Stop lamp not working |1.2.1b| | 1 |
| Rear Rear position lamp|s| not working |1.1.A.3b| | 1 |
| Offside Rear Lower Rear wheel bearing has excessive play |2.6.2| | 1 |
| Service brake: efficiency below requirements |3.7.B.7| | 1 |
| Parking brake: efficiency below requirements |3.7.B.7| | 1 |
| Front Horn not working |7.7 |a| |ii|| | 1 |
| Rear Wheel spoke cracked. |4.2.1b| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Stop lamp does not illuminate immediately a brake applies rear brake bulb
|1.3.1a| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Front Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Exhaust markings indicating not for road use or similar wording |6.1.2 |c|| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Offside Indicator tell tale not functioning |1.5.2| | 1 |
| Nearside Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Offside Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride brake reaction arm securing bolts locking devices not evident. |6.2.1h| | 1 |
| Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Headlamp damaged and function impaired |1.2.3a| | 1 |
| Nearside Position lamp light intensity significantly reduced |4.2.3 |a| |ii|| | 1 |
| Engine mounting/bracket missing bolt missing engine to frame. |6.1.8 |a| |ii|| | 1 |
| Steering operation linkage fouling when handlebars turned from lock to lock wiring and battery inseure |2.1.4 |a|| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Front Position lamp switch insecure (4.2.2 (b)) | 1 |
| Nearside Front Wheel more than one fixing loose spindle clamp bolts loose (5.2.1 (a) (ii)) | 1 |
| Stop lamp does not illuminate immediately a brake applies from rear control (1.3.1a) | 1 |
| Handlebar mounting insecure (2.2.1 (a) (i)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Rear All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Fuel tank insecure (6.1.3 (a) (i)) | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Front Stop lamp(s) not working sticky (4.3.1 (a) (ii)) | 1 |
| Rear Brake linkage has abnormal movement of levers indicating excessive wear or maladjustment fell apart on test (1.1.15 (f)) | 1 |
| Rear Brake pedal so insecure that the brake cannot be readily applied (1.1.2 (e) (ii)) | 1 |
| Central Rear Lower Suspension arm pin or bush excessively worn shock bush. (5.3.4 (a) (i)) | 1 |
| Fuel system component leaking carbs flooding (6.1.3 (b) (i)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Fuel cap ineffective (6.1.3 (b) (i)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |