| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 23 |
| Steering headbearing has excessive free play |2.2.2| | 14 |
| Rear reflector on motorcycle missing |1.4.1| | 12 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 7 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 6 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Registration plate issues | 5 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 4 |
| Handlebar mounting clamp loose |2.1.1a| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Direction indicators not working |1.5.1c| | 3 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 3 |
| Brake hose damaged | 3 |
| Horn not working |1.7.3a| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Headlamp aim not tested |1.6| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Front Direction indicator not working |1.5.1c| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| An item not tested |Manual| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Centre Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| All direction indicators not working (4.4.1 (a) (ii)) | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Offside Steering lock stop maladjusted |2.1.3| | 1 |
| Front Lower Front mudguard insecure |2.3.7| | 1 |
| Front Upper Handlebar mounting clamp loose |2.1.1a| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Nearside Front Upper Direction indicators not working |1.5.1c| | 1 |
| Inner Front Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Rear Lower Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Inner Front Fairings so located that it is likely to impede the steering |2.1.2e| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Offside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Rear position lamp insecure lens |1.1.1c| | 1 |
| Nearside Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 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 |
| Upper Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake lever mounting insecure |3.1.2a| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Centre Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Front Front position lamp insecure |1.1.1c| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Centre Front Lower Motorcycle structure cracked |6.1.1a| | 1 |
| Front Handlebar mounting clamp loose |2.1.1a| | 1 |
| Front Steering lock stop ineffective |2.1.3| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Rear Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Rear Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Steering linkage has excessive free play |2.2.2| | 1 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Nearside Front Brake hose damaged and likely to fail |1.1.12 |a|| | 1 |
| Front Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Direction indicators not working all |1.5.1c| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Nearside Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking side plate insecure |6.1.1c| | 1 |
| Offside Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking side plate insecure |6.1.1c| | 1 |
| Riders seat insecure bucket not bolted down |6.2.1a| | 1 |
| Rear suspension bush has excessive free play rear shock top mount |2.4.A2a|i|| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Nearside Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Centre Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Leg shield insecure and likely to impede the steering |2.1.2e| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Nearside Rear Direction indicator incorrect colour |4.4.3 |a|| | 1 |
| Offside Rear Direction indicator incorrect colour |4.4.3 |a|| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Brake lever is inoperative |3.1.3c| | 1 |
| Rear Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Fuel pipe leaking excessively or a risk of fire (6.1.3 (b) (ii)) | 1 |
| Brake performance not tested (1.2.1 (g)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Handlebar mounting clamp bolt loose bolt loose on top of steering column (2.1.1a) | 1 |
| Front Throttle operating incorrectly revs up when turned right (6.2.7 (a) (i)) | 1 |
| Rear Fuel hose leaking fuel hose leaking at carb (6.1.3 (b) (i)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen incorrect beam pattern (4.1.2 (a)) | 1 |
| Forks in such a condition that steering control is adversely affected steering system loose (2.2.2 (d) (ii)) | 1 |
| Stop lamp not working when operated from left hand side handle bar lever (4.3.1 (a) (ii)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |