| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 49 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 25 |
| Drive chain excessively loose |6.2.1d| | 19 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 16 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 15 |
| Horn not working |1.7.3a| | 13 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 11 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 11 |
| Steering headbearing has excessive free play |2.2.2| | 11 |
| Registration plate lamp issues | 10 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 9 |
| Brake hose excessively deteriorated | 9 |
| Registration plate issues | 9 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 9 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 8 |
| Drive chain worn to excess |6.2.1e| | 7 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 7 |
| Front wheel bearings have excessive free play |2.3.5b| | 7 |
| Drive chain excessively tight |6.2.1d| | 7 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Front Brake excessively binding (1.2.1 (f)) | 6 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 6 |
| Throttle operating incorrectly |6.2.1f| | 6 |
| Brake lever has inadequate reserve travel |3.1.3b| | 6 |
| Stop lamp remains on when the brakes are released | 6 |
| Rear reflector on motorcycle missing |1.4.1| | 6 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 6 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 6 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Front wheel bearings are excessively rough |2.3.5b| | 5 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 5 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 5 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 5 |
| Rear Brake excessively binding (1.2.1 (f)) | 5 |
| 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| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Nearside Rear Footrest missing |6.2.1a| | 4 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 4 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 4 |
| Indicator switch insecure |1.5.4| | 4 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 4 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 4 |
| Horn not working (7.7 (a) (ii)) | 4 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 4 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 4 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 4 |
| Offside Front Direction indicator insecure |1.5.3b| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Horn not working (7.7 (a)) | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 3 |
| Front Position lamp not working (4.2.1 (a)) | 3 |
| Headlamp aim not tested |1.6| | 3 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 3 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 3 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 3 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 2 |
| Front Brake excessively binding |1.2.1 |f|| | 2 |
| Rear Brake excessively binding |1.2.1 |f|| | 2 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition |8.1.1 |a|| | 2 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 2 |
| Position lamp switch insecure |1.1.4b| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Front Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 2 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Exhaust system insecure |6.1.2 |a|| | 2 |
| Riders seat insecure |6.2.5 |a| |ii|| | 2 |
| Drive chain excessively tight |6.1.7 |k| |i|| | 2 |
| Front Brake lever is positioned so that the brake cannot be readily applied |3.1.3c| | 2 |
| Headlamp switch insecure |1.2.4| | 2 |
| Rear position lamp incorrect colour |1.1.2b| | 2 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Clutch lever bent so it cannot be readily operated. |6.2.1g| | 2 |
| Centre Rear Lower Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 2 |
| Offside Handlebar deformed |2.1.1b| | 2 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Front Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 2 |
| Brake performance not tested (1.2.1 (g)) | 2 |
| Headlamp aim not tested (4.1.2 (b)) | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Exhaust system insecure (6.1.2 (a)) | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Brake hose damaged | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 2 |
| Offside Rear Footrest missing (6.2.12 (a)) | 2 |
| Front Brake hose fouling |3.2.B3b| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 2 |
| Headlamp incorrect colour (4.1.4 (a)) | 2 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 2 |
| Rear Brake master cylinder fluid level dangerously low |3.2.B1d| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 2 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 2 |
| Rear Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 2 |
| Offside Front Direction indicator missing |1.5.1a| | 2 |
| Nearside Front Direction indicator insecure |1.5.3b| | 2 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 2 |
| Rear Brake caliper insecure (1.1.16 (c) (i)) | 2 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Front Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition (8.1.1 (a)) | 2 |
| Nearside Rear Footrest insecure |6.2.1a| | 2 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 2 |
| Rear Brake fluid reservoir insecurely mounted |3.2.B1a| | 2 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride Rear sprocket bolt missing |6.2.1h| | 2 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition (8.1.1 (a)) | 2 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Rear Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 2 |