| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 29 |
| Headlamp aim out of alignment | 26 |
| Drive chain excessively loose |6.2.1d| | 15 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 13 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 12 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Fuel system component insecure |7.2.1b| | 11 |
| Registration plate issues | 10 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 9 |
| Front 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 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 6 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Steering headbearing has excessive free play |2.2.2| | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Offside Rear Footrest missing |6.2.1a| | 5 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 5 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Rear Footrest missing |6.2.1a| | 4 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 4 |
| Nearside Rear Footrest missing |6.2.1a| | 4 |
| Horn not working |1.7.3a| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Offside Rear Direction indicator not working |1.5.1c| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Fuel system component leaking |7.2.1a| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Front position lamp incorrect colour |1.1.2a| | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 3 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Horn missing |1.7.1| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 2 |
| Rear position lamp insecure |1.1.1c| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Headlamp switch faulty |1.2.4| | 2 |
| Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Rear Brake component leaking fluid |3.2.B4| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Offside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front Front position lamp missing |1.1.1a| | 1 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Throttle operating incorrectly sticks due to cable incorrectly routed and fouling on fuel tank |6.2.1f| | 1 |
| Front Brake pipe union leaking fluid brake caliper union leaking |3.2.B4| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease brake fluid on disc |3.2.A1k| | 1 |
| Offside Steering lock stop maladjusted bar can crush right hand against fuel tank |2.1.3| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Brake disc|s| securing bolt|s| loose |3.2.A1g| | 1 |
| Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear 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 |
| Nearside Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Nearside Front Upper Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Centre Front Upper Headlamp aim not tested |1.6| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Rear Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Brake pedal is inoperative NOT ABLE TO CHECK CORRECTLY |3.1.3c| | 1 |
| Front Brake locking device missing lever pivot bolt nut |3.2.A1e| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Nearside Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Centre Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Rear Brake pipe union leaking fluid |3.2.B4| | 1 |
| Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Front Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Nearside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Front Direction indicator missing |1.5.1a| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Nearside Front Steering lock stop ineffective |2.1.3| | 1 |
| Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Offside Front Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Nearside Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Brake pipe likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Rear reflector on sidecar missing |1.4.1| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| 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 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front Upper Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Footrest insecure |6.2.1a| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Front Headlamp incorrect colour |1.2.1| | 1 |
| Offside Front suspension assembly component loose |2.3.1| | 1 |
| Offside Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Front Exhaust mounting missing |7.1.1c| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Nearside Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Offside Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Nearside Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Front Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front position lamp does not illuminate immediately when switched on both |1.1.3a| | 1 |
| Nearside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Front Brake lining|s| contaminated by oil or grease |3.2.A1k| | 1 |
| Offside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Offside Front Footrest insecure |6.2.12 |a|| | 1 |
| Brake pedal pivot excessively worn |1.1.1 |b|| | 1 |
| Nearside Engine mounting/bracket missing bolt missing from engine mount |6.1.8 |a| |ii|| | 1 |
| Brake component has an inadequate repair |3.1.5| | 1 |
| Nearside Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Footrest missing |6.2.1a| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Offside Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Shock absorber has a serious fluid leak both seals |5.3.2 |b|| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Offside Brake lever has insufficient reserve travel front brake |1.1.2 |a|| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Front Brake fluid reservoir fluid level dangerously low (3.2.B1d) | 1 |
| Clutch lever shortened so it cannot be readily operated (6.2.7 (b)) | 1 |
| Stop lamp not working not working when rear brake is applied (4.3.1 (a) (ii)) | 1 |
| Rear Position lamp adversely affected by the operation of another lamp rear light adversely affected when front brake is applied (4.2.3 (b)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen no beam pattern due to incorrect bulb type fitted (4.1.2 (a)) | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear Drive chain sprocket so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Offside Rear Brake pedal insecure (1.1.2 (e) (i)) | 1 |
| Offside Rear Brake pedal pivot excessively worn (1.1.1 (b)) | 1 |
| Offside Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Offside Rear Footrest insecure (6.2.12 (a)) | 1 |
| Front Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Offside Front Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 1 |
| Front Brake lever has insufficient reserve travel Lever stops against throttle housing (1.1.2 (a)) | 1 |
| Fuel tank insecure (6.1.3 (a) (i)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |