| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 40 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 28 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 23 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 19 |
| Drive chain excessively loose |6.2.1d| | 15 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 14 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 11 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Throttle operating incorrectly |6.2.1f| | 10 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Registration plate issues | 9 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 9 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 8 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Steering headbearing has excessive free play |2.2.2| | 7 |
| Drive chain worn to excess |6.2.1e| | 7 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Headlamp aim beam image kick up to the offside |1.6| | 7 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 7 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 7 |
| Drive chain excessively tight |6.2.1d| | 7 |
| Registration plate lamp issues | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 6 |
| Rear reflector on motorcycle missing |1.4.1| | 6 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Offside Handlebar deformed |2.1.1b| | 5 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 5 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Offside Handlebar mounting clamp bolt loose |2.1.1a| | 4 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 3 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 3 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Offside Front Direction indicator insecure |1.5.3b| | 3 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 3 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 3 |
| Rear Drive chain worn to excess |6.2.1e| | 3 |
| Horn not working |1.7.3a| | 3 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 3 |
| Rear Brake excessively binding (1.2.1 (f)) | 3 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Fuel system component leaking |7.2.1a| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 2 |
| Offside Rear Footrest insecure |6.2.1a| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Front Brake excessively binding |1.2.1 |f|| | 2 |
| Rear Rear mono-shock pivot seized |2.4.B.4| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 2 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 2 |
| Rear mono-shock pivot seized |2.4.B.4| | 2 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 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 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Nearside Rear Exhaust mounting missing |7.1.1c| | 1 |
| Offside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Nearside Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Offside Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Nearside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Brake lever attachment screws loose |3.1.2b| | 1 |
| Rear Brake hose leaking fluid |3.2.B4| | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Position lamp switch does not operate the front and rear position lamps |1.1.4c| | 1 |
| Rear Brake back plate|s| insecure |3.2.A1j| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Rear Brake hose leaking |1.1.12 |c|| | 1 |
| Rear Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Offside Front Lower Brake excessively binding |1.2.1 |f|| | 1 |
| Offside Front Upper Throttle operating incorrectly |6.2.7 |a| |i|| | 1 |
| Nearside Front Upper Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Rear suspension bearing has excessive free play suspension linkage |2.4.A2a|i|| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Brake locking device missing rear brake pedal linkage |3.2.A1e| | 1 |
| Front Direction indicator insecure |1.5.3b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Front Handlebar deformed |2.1.1b| | 1 |
| Nearside Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Centre Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Rear Lower Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Throttle operating incorrectly not self closing |6.2.1f| | 1 |
| Offside Exhaust mounting missing silencer clamp missing |7.1.1c| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort 38 kgf deflection rear disc |3.3.A1d| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort 50 kgf deflection |3.3.A1d| | 1 |
| Direction indicator flashing more than 120 times per minute all |1.5.1c| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Brake performance not tested |3.3| | 1 |
| Rear Brake performance not tested |3.3| | 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 |
| Decelerometer brake test the less effective brake control does not achieve an efficiency of 25%. |3.3.E1b| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Rear Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Offside Front Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Nearside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Nearside Handlebar fractured |2.1.1b| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Offside Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Centre Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Lower Steering headbearing has excessive free play |2.2.2| | 1 |
| Fuel system component leaking |6.1.3 |b| |i|| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Handlebar mounting insecure |2.2.1 |a| |i|| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 1 |
| Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Front Brake component leaking fluid |3.2.B4| | 1 |
| Rear Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected |6.2.7 |a| |ii|| | 1 |
| Steering operation restricted in free movement from lock to lock |2.1.4 |c|| | 1 |
| Front Brake indicates excessive fluctuation of brake effort 15kgf variation |1.2.1 |e|| | 1 |
| Front Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Centre Rear Lower Rear suspension bearing excessively deteriorated |2.4A.2a|i|| | 1 |
| Centre Front Upper Rear suspension bearing excessively deteriorated |2.4A.2a|i|| | 1 |
| Centre Rear Upper Rear suspension bearing excessively deteriorated |2.4A.2a|i|| | 1 |
| Front Upper Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Offside Front Roller brake test indicates excessive fluctuation of brake effort 25 kgf deflection |3.3.A1d| | 1 |
| Nearside Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Nearside Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Front Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Front Front suspension assembly component excessively bent |2.3.1| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Front Forks in such a condition that steering control is adversely affected |2.2.2 |d| |ii|| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Inner Rear Lower Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Inner Rear Upper Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Offside Rear Footrest insecure |pillion| |6.2.1a| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Front Front wheel spindle securing nut locking device insecure |2.3.5a| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake component defective due to a deliberate modification which significantly reduces the original strength |3.1.5| | 1 |
| Rear Brake pipe union leaking fluid |3.2.B4| | 1 |
| Rear Brake hose which buldges |3.2.B4| | 1 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Offside Front Upper Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Wheel bearing rough when rotated Sidecar wheel (5.1.3 (b) (i)) | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Front Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Roller brake test No brake control achieves an efficiency of 30% (1.2.2 (a) (i)) | 1 |
| Central Rear Lower Suspension rod ball joint likely to become detached (5.3.4 (a) (ii)) | 1 |
| Stop lamp with a multiple light source more than 1/2 not functioning (4.3.1 (a) (ii)) | 1 |
| Rear Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Offside Rear Lower Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Nearside Front Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Rear Position lamp not working rear light not working (4.2.1 (a)) | 1 |
| Rear Drive chain worn to excess rear chain badly worn and loose (6.1.7 (c) (i)) | 1 |
| Rear Drive chain horseshoe locking device likely to become detached rear chain may come off (6.1.7 (j) (ii)) | 1 |
| Rear Drive chain sprocket so loose it is likely to fail rear sprocket carrier bearing has broken up (6.1.7 (c) (ii)) | 1 |
| Nearside Motorcycle structure joining/attachment plate or fastening insecure Side stand attachment bracket insecure (6.1.1 (b) (i)) | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |