| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 26 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 22 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 19 |
| Front wheel bearings have excessive free play |2.3.5b| | 18 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 13 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 8 |
| Drive chain excessively loose |6.2.1d| | 8 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 8 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 7 |
| Throttle operating incorrectly |6.2.1f| | 7 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Front Brake excessively binding (1.2.1 (f)) | 6 |
| Front wheel bearings are excessively rough |2.3.5b| | 5 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Registration plate issues | 5 |
| Horn not working |1.7.3a| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Headlamp switch faulty |1.2.4| | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Rear Brake disc|s| cracked |3.2.A1g| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 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| | 2 |
| Offside Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Nearside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Steering headbearing in such a condition that steering control is adversely affected |2.2.2 |f| |ii|| | 2 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Front Brake excessively binding |1.2.1 |f|| | 2 |
| Rear Drive chain excessively tight |6.2.1d| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Front Brake disc|s| cracked |3.2.A1g| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Nearside Front Direction indicator missing |1.5.1a| | 2 |
| Offside Front Direction indicator missing |1.5.1a| | 2 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Horn not working (7.7 (a)) | 2 |
| Front Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Centre Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Plate brake test indicates a severely grabbing brake |3.3.B1b| | 1 |
| Indicator tell tale not operating correctly |1.5.2| | 1 |
| Nearside Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Offside Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Stop lamp does not illuminate immediately a brake applies front |1.3.1a| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Offside Front Lower Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Exhaust has a major leak of exhaust gases Complete system corroded |6.1.2 |a|| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Stop lamp does not illuminate immediately a brake applies replace bulb |1.3.1a| | 1 |
| Offside Throttle operating incorrectly |6.2.1f| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Stop lamp insecure |1.3.3b| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Brake pedal mounting insecure |3.1.2a| | 1 |
| Brake pedal is inoperative |3.1.3c| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Nearside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Nearside Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Nearside Front Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Stop lamp does not illuminate immediately a brake applies when rear brake applied |1.3.1a| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Lower Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Nearside Front Lower Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Front Lower Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Centre Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Offside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Front An item not tested |Manual| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Inner Front Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Centre Lower Exhaust excessively deteriorated |7.1.1a| | 1 |
| Nearside Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Offside Front Front wheel spindle securing nut|s| loose |2.3.5a| | 1 |
| Offside Rear Brake cylinder insecurely mounted |3.2.B1a| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Exhaust is leaking and excessively noisey silencer gasket |7.1.1b| | 1 |
| Exhaust mounting does not fully support the exhaust system silencer mount |7.1.1.c| | 1 |
| Rear Brake hose leaking fluid |3.2.B4| | 1 |
| Rear Brake hose fouling |3.2.B3b| | 1 |
| Front Floor brake test indicates a severely juddering brake |3.3C2d.| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Stop lamp does not illuminate immediately a brake applies from front |1.3.1a| | 1 |
| Brake disc|s| cracked |3.2.A1g| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on right |1.1.3a| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Fuel system component leaking Fuel leaking onto exhaust |7.2.1a| | 1 |
| Fairings so located that it is likely to impede the steering |2.1.2e| | 1 |
| Nearside Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Front Indicator tell tale not operating correctly |1.5.2| | 1 |
| Front Front mudguard can easily contact any fixed point of the motor bicycle. |2.3.7| | 1 |
| Nearside Front Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Nearside Brake disc|s| cracked |3.2.A1g| | 1 |
| Offside Brake disc|s| cracked |3.2.A1g| | 1 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Rear Wheel damaged or distorted to the extent that control of the motorcycle is likely to be adversely affected (5.2.2 (c) (ii)) | 1 |
| Rear Stop lamp not working Rear brake light switch adjusted (4.3.1 (a) (ii)) | 1 |
| Nearside Front Brake disc fractured (1.1.14 (a) (ii)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Throttle operating incorrectly throttle speed increases when steering turned to l/h/s (6.2.7 (a) (i)) | 1 |
| Rear Brake fluid not visible (1.1.10 (d) (iii)) | 1 |
| Headlamp incorrect colour (4.1.4 (a)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Riders seat missing (6.2.5 (a) (ii)) | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Offside Front Upper Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen beam mask fitted at time of test (4.1.2 (a)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Stop lamp not working does not operate from front brake switch (4.3.1 (a) (ii)) | 1 |
| Rear Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Front Brake lever is bent and the brake cannot be readily applied (1.1.2 (d)) | 1 |