| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 41 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 13 |
| Registration plate issues | 13 |
| Drive chain excessively loose |6.2.1d| | 13 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 13 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 11 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 8 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 7 |
| Horn not working |1.7.3a| | 6 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 6 |
| Throttle operating incorrectly |6.2.1f| | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Rear reflector on motorcycle missing |1.4.1| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 4 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 3 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Nearside Rear Footrest missing |6.2.1a| | 3 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Rear Footrest insecure |6.2.1a| | 2 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 2 |
| Front Footrest insecure |6.2.1a| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Rear Brake disc fractured (1.1.14 (a) (ii)) | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Riders seat missing |6.2.1a| | 1 |
| Offside Front Lower Steering lock stop ineffective |2.1.3| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Centre Front Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Handlebar so insecure it is likely to become detached (2.2.1 (b) (ii)) | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Exhaust is leaking and excessively noisey balance pipe |7.1.1b| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 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 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Centre Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Nearside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Nearside Front suspension assembly component missing |2.3.1| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Headlamp damaged and function impaired |1.2.3a| | 1 |
| Offside Indicator tell tale not functioning |1.5.2| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Rear Rear suspension component loose |2.4.A.1a| | 1 |
| Rear Floor brake test indicates a severely grabbing brake |3.3.C2d| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Centre Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Decelerometer brake test indicates a sticking brake |3.3.E1d| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Front suspension fouling which affects the movement of the front suspension. |2.3.6a| | 1 |
| Steering lock stop ineffective |2.1.3| | 1 |
| Lower Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Rear Upper Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 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 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Throttle operating incorrectly throttle sticks open (6.2.7 (a) (i)) | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Brake back plate|s| insecure |3.2.A1j| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Offside Front Throttle operating incorrectly |6.2.1f| | 1 |
| Rear Footrest insecure Fitted the wrong way round |6.2.1a| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Offside Indicator switch defective |1.5.4| | 1 |
| Throttle operating incorrectly not returning r/h lock |6.2.1f| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Brake pedal is positioned so that the brake cannot be readily applied r/h footrest bent |3.1.3c| | 1 |
| Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Brake pipe inadequately supported |3.2.B2b| | 1 |
| Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Nearside Front Stop lamp insecure indicator not secure |1.3.3b| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Handlebar handgrip not secure to handlebars. both |2.1.1c| | 1 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 1 |
| Rear Drive chain sprocket so loose it is likely to fail Rubbing on swingarm (6.1.7 (c) (ii)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Front Lower Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Nearside Rear Lower Drive chain excessively loose |6.2.1d| | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Stop lamp not working Rear brake lamp switch inoperative (4.3.1 (a) (ii)) | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Brake hose damaged | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Rear Direction indicator obviously incorrectly positioned |4.4.3 |a|| | 1 |
| Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Rear Direction indicator adversely affected by the operation of another lamp |4.4.3 |b|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 1 |
| Exhaust silencer likely to become detached |8.1.1 |b| |ii|| | 1 |
| Fuel tank insecure |6.1.3 |a| |i|| | 1 |
| Registration plate lamp issues | 1 |
| Forks in such a condition that steering control is adversely affected front fork brace missing |2.2.2 |d| |ii|| | 1 |
| Riders seat insecure |6.2.5 |a| |ii|| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Nearside Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Nearside Front Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Steering control handlebar movement restricted by trapped cables reves on r/hand lock |2.1.2c| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Front Upper Horn not working |1.7.3a| | 1 |
| Nearside Rear Upper Direction indicator not working |1.5.1c| | 1 |
| Offside Front Upper Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Offside Rear Lower Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Headlamp missing |1.2.3a| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected |6.2.7 |a| |ii|| | 1 |
| Rear Footrest insecure |6.2.12 |a|| | 1 |
| Front Brake effort inadequate at a wheel |1.2.1 |a| |i|| | 1 |
| Front Brake grabbing severely |1.2.1 |c|| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Offside Rear All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Throttle operating incorrectly sticks when steering lock to right |6.2.1f| | 1 |
| Exhaust noise is clearly in excess of that emitted by a similar motor bicycle fitted with a standard silencer in average condition silencers missing |7.1.2| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Horn missing |1.7.1| | 1 |
| Nearside Lower Front suspension assembly component loose yoke clamp bolt loose |2.3.1| | 1 |
| Nearside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Inner Rear Upper Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Offside Upper Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |