| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 35 |
| Drive chain excessively loose |6.2.1d| | 15 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 14 |
| Registration plate issues | 11 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Rear reflector on motorcycle missing |1.4.1| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear Position lamp not working (4.2.1 (a)) | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Nearside Front Footrest insecure |6.2.1a| | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 2 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 2 |
| Drive chain excessively tight |6.2.1d| | 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 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 2 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 2 |
| Rear Brake disc fractured (1.1.14 (a) (ii)) | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 2 |
| Horn not working (7.7 (a)) | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Front Position lamp not working |4.2.1 |a|| | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| All direction indicators not working (4.4.1 (a) (ii)) | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Throttle operating incorrectly sticking |6.2.1f| | 1 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Brake fluid reservoir fluid level dangerously low not seen in level sight glass |3.2.B1d| | 1 |
| Drive chain excessively tight chain links, tight spots |6.2.1d| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Rear Stop lamp not working using front brake lever (4.3.1 (a) (ii)) | 1 |
| Brake fluid reservoir fluid level significantly below minimum level (1.1.10 (d) (ii)) | 1 |
| Nearside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Rear Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 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 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Headlamp damaged and function impaired |1.2.3a| | 1 |
| Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Nearside Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Rear Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies switch faulty |1.3.1a| | 1 |
| Direction indicator insecure |1.5.3b| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Offside Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Front Brake hose damaged and likely to fail fouling on front suspension (1.1.12 (a)) | 1 |
| Fuel cap ineffective (6.1.3 (b) (i)) | 1 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition (8.1.1 (a)) | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Fuel system component leaking Carburettor (6.1.3 (b) (i)) | 1 |
| Nearside Front All direction indicators obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Offside Front All direction indicators obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Exhaust silencer likely to become detached silencers mounted to swinging arm |8.1.1 |b| |ii|| | 1 |
| Brake master cylinder severely corroded |3.2.B1b| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear position lamp incorrect colour rear light lens loose,showing white light to back |1.1.2b| | 1 |
| Nearside Rear Direction indicator insecure bracket loose |1.5.3b| | 1 |
| Nearside Indicator switch insecure not in a fixed position on bar,needs to be pegged |1.5.4| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Headlamp switch insecure not fixed on handlebar,switch needs to be pegged. whole unit moves |1.2.4| | 1 |
| Brake hose fouling front brake hose gets trapped between forks and ignition lock,needs to be re-routed |3.2.B3b| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Seat insecure pillion seat not fixed at front |6.2.1a| | 1 |
| Stop lamp emits other than a steady red light rear light lens loose,stoplight showing white to rear |1.3.1b| | 1 |
| Headlamp light source and lamp not compatible (4.1.4 (c)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Horn not working |1.7.3a| | 1 |
| Nearside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Front All direction indicators incorrect colour (4.4.3 (a)) | 1 |
| Chain guard insecure (6.1.7 (i)) | 1 |
| Fuel system component leaking CARBEURATOR (6.1.3 (b) (i)) | 1 |
| Handlebar excessively deformed (2.2.1 (c) (i)) | 1 |
| Footrest insecure hanging too low (6.2.12 (a)) | 1 |
| Nearside Fuel hose leaking pipe from fuel tap to carb insecure and leaking |7.2.1a| | 1 |
| Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Nearside Footrest missing |6.2.1a| | 1 |
| Offside Footrest missing |6.2.1a| | 1 |
| Central Rear Stop lamp adversely affected by the operation of another lamp (4.3.3 (b)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Brake lever insecure front brake lever and rear brake lever security nuts are missing off the pivot bolts (1.1.2 (e) (i)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Rear Shock absorber has an excessively worn bush right hand lower bush (5.3.2 (c)) | 1 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Front Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Nearside Front Engine mounting/bracket excessively loose (6.1.8 (a) (ii)) | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Rear Stop lamp not working Pedal (4.3.1 (a) (ii)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Centre Front Upper Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Rear Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Rear All direction indicators obviously incorrectly positioned to close together. (4.4.3 (a)) | 1 |
| Front All direction indicators obviously incorrectly positioned to close together. (4.4.3 (a)) | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Stop lamp does not illuminate immediately a brake applies Front |1.3.1a| | 1 |
| Stop lamp does not illuminate immediately a brake applies Rear |1.3.1a| | 1 |
| Headlamp aim not tested |4.1.2 |b|| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Nearside Direction indicator not working front & rear |1.5.1c| | 1 |
| Offside Direction indicator not working front & rear |1.5.1c| | 1 |
| Stop lamp does not illuminate immediately a brake applies front brake lever and rear |1.3.1a| | 1 |
| Offside Front Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Central Front Motorcycle structure has a fracture which is likely to adversely affect braking or steering handlebar mount cracked |6.1.1 |a| |ii|| | 1 |
| Throttle operating incorrectly sticking on full lock |6.2.7 |a| |i|| | 1 |
| Central Front Wheel bearing rough when rotated front wheel hard to rotate wheel bearings bad possibly excessive brake binding |5.1.3 |b| |i|| | 1 |
| Central Front Brake caliper leaking and braking performance affected front caliper leaking |1.1.16 |b| |ii|| | 1 |
| Central Rear Brake caliper insecurely mounted and braking performance affected rear caliper insecure |1.1.16 |c| |ii|| | 1 |
| Motorcycle structure is fractured and structural rigidity is significantly reduced UNDER SEAT CROSS MEMBER |6.1.1 |a| |i|| | 1 |
| All direction indicators missing |4.4.1 |a| |ii|| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Rear Brake master cylinder leaking (1.1.10 (b) (ii)) | 1 |
| Front Lower Brake hose bulging under pressure (1.1.12 (d)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Front Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Centre Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Centre Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Centre Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Centre Front Throttle operating incorrectly |6.2.1f| | 1 |
| Front Brake lever not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Nearside Rear Direction indicator incorrect colour |4.4.3 |a|| | 1 |
| Offside Rear Direction indicator incorrect colour |4.4.3 |a|| | 1 |
| Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear All position lamps not working |4.2.1 |a|| | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |
| Nearside Footrest insecure |6.2.12 |a|| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Headlamp aim beam image kick up to the offside No beam pattern |1.6| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Brake pipe union leaking fluid Caliper to hose union |3.2.B4| | 1 |
| Rear Brake pipe union leaking fluid caliper to hose union loose |3.2.B4| | 1 |
| Nearside Front Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Brake caliper has no reserve travel and braking performance affected |1.1.16 |e| |ii|| | 1 |
| Stop lamp not working not working from brake lever or foot pedal |4.3.1 |a| |ii|| | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Steering linkage ball joint worn to the extent there is a serious risk of detachment |2.1.3 |b| |ii|| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.4 |a|| | 1 |
| Front Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 1 |
| Front Headlamp aim not tested (4.1.2 (b)) | 1 |
| Rear Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Rear Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition (8.1.1 (a)) | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Nearside Rear Lower Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Rear Brake has no recorded effort at a wheel |1.2.1 |a| |ii|| | 1 |
| Brake pedal insecure |1.1.2 |e| |i|| | 1 |
| Stop lamp not working rear brake |4.3.1 |a| |ii|| | 1 |
| Nearside Rear Footrest insecure |6.2.12 |a|| | 1 |
| Rear Brake caliper insecure |1.1.16 |c| |i|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Offside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Central Fuel pipe so insecure there is a risk of fire (6.1.3 (a) (ii)) | 1 |