| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 40 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 28 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 27 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 17 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 16 |
| Steering headbearing has excessive free play |2.2.2| | 12 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 12 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 12 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 12 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 11 |
| Horn not working |1.7.3a| | 11 |
| Registration plate issues | 9 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Front Steering headbearing has excessive free play |2.2.2| | 5 |
| Brake pedal insecure |3.1.2a| | 4 |
| Headlamp aim not tested |1.6| | 4 |
| An item not tested |Manual| | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 4 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 4 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 3 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Fuel system component leaking |7.2.1a| | 3 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 3 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Rear position lamp adversely affected by the operation of the horn |1.1.3b| | 3 |
| Rear Brake pedal insecure |3.1.2a| | 3 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Front Horn not working |1.7.3a| | 3 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 2 |
| Rear wheel insecure |4.2.3b| | 2 |
| Front suspension assembly component loose |2.3.1| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Stop lamp affected by the operation of the horn |1.3.2| | 2 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 2 |
| Front suspension assembly component excessively misaligned |2.3.1| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Rear wheel has a missing wheel stud|s| |4.2.3a| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Floor brake test Neither brake control achieves an efficiency of 25% |3.3.C1b| | 2 |
| Brake lever is inoperative |3.1.3c| | 2 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Upper Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 2 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 2 |
| Brake pedal pivots excessively worn |3.1.3a| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 2 |
| Offside Steering lock stop ineffective |2.1.3| | 2 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Fuel cap missing |7.2.2a| | 1 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Offside Front Lower Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Nearside Front suspension assembly component loose |2.3.1| | 1 |
| Offside Front suspension assembly component loose |2.3.1| | 1 |
| Rear wheel has a missing wheel nut|s| |4.2.3a| | 1 |
| Rear Wheel fixing loose |single fixing| |5.2.1 |a| |ii|| | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Plate brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.B2b| | 1 |
| Front Brake component defective due to a deliberate modification which significantly reduces the original strength |3.1.5| | 1 |
| Centre Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear Brake component is severely distorted |3.1.5| | 1 |
| Brake pedal is inoperative |3.1.3c| | 1 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Brake hose excessively deteriorated | 1 |
| Offside Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Nearside Rear Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Centre Front Lower Steering headbearing has excessive free play |2.2.2| | 1 |
| Offside Front Upper Headlamp switch faulty |1.2.4| | 1 |
| Offside Rear Lower Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Front wheel spindle securing nut|s| loose |2.3.5a| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Brake component is fractured |3.1.5| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Throttle operating incorrectly Throttle does not return to off position automatically |6.2.1f| | 1 |
| Front All position lamps not working dipped beam and high beam not working..| no bulb| |4.2.1 |a|| | 1 |
| Rear Seat insecure |6.2.1a| | 1 |
| Offside Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Centre Rear Lower Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Rear Rear wheel insecure |4.2.3b| | 1 |
| Lower Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Brake lever is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Motorcycle structure excessively distorted |6.1.1a| | 1 |
| Offside Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Front Brake effort inadequate at a wheel |1.2.1 |a| |i|| | 1 |
| Front Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Front Front suspension spring incomplete |2.2.1b|I|| | 1 |
| Nearside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Headlamp aim not tested |4.1.2 |b|| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Exhaust system insecure |6.1.2 |a|| | 1 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 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 |
| Rear Brake pedal mounting insecure |3.1.2a| | 1 |
| Position lamp switch does not operate the front and rear position lamps |1.1.4c| | 1 |
| Rear Brake drum|s| insecure |3.2.A1g| | 1 |
| Front Brake drum|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Nearside Front Brake locking device insecure |3.2.A1e| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Front Front suspension fouling which affects the movement of the front suspension. |2.3.6a| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Steering linkage has excessive free play |2.2.2| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Centre Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Motorcycle structure cracked frame |6.1.1a| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Rear Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Plate brake test indicates a sticking brake |3.3.B1a| | 1 |
| Front Brake back plate|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride rear hub nut loose |6.2.1h| | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Centre Front Headlamp switch faulty |1.2.4| | 1 |
| Centre Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Headlamp damaged and function impaired |1.2.3a| | 1 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Front Brake lever insecure |3.1.2a| | 1 |
| Front Front position lamp does not illuminate immediately when switched on side light |1.1.3a| | 1 |
| Front Front position lamp does not illuminate immediately when switched on dipped beam |1.1.3a| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| All position lamps adversely affected by the operation of the horn |1.1.3b| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Front Front wheel insecure |4.2.3b| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front Brake cable badly frayed |3.2.A1b| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Headlamp aim not tested |1.6| | 1 |
| Stop lamp lens defective such that the emitted light is adversely affected stop lamp and brake lamp switched round, unable to see stop lamp when position lamp is on |4.3.1 |b| |ii|| | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Headlamp at least one does not illuminate on main beam (1.2.2a(ii)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Front Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |