| Most common failures | No# failures |
|---|
| Registration plate issues | 36 |
| Headlamp aim out of alignment | 30 |
| Rear reflector on motorcycle missing |1.4.1| | 18 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 12 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 8 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 7 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Headlamp aim beam image kick up to the offside |1.6| | 6 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 6 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 5 |
| Drive chain excessively loose |6.2.1d| | 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| | 5 |
| Rear Brake disc|s| cracked |3.2.A1g| | 4 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Riders seat insecure |6.2.1a| | 3 |
| Horn not working |1.7.3a| | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Nearside Front Footrest insecure |6.2.1a| | 2 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Centre Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Front position lamp missing |1.1.1a| | 2 |
| Offside Rear Brake disc significantly and obviously worn badly warped (1.1.14 (a) (i)) | 1 |
| Front Brake component insecure both front brake flexi hoses |1.1.21 |c|| | 1 |
| Front Exhaust has a major leak of exhaust gases several places on the front pipe |6.1.2 |a|| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Offside Rear Lower Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Nearside Rear Direction indicator obscured |1.5.1a| | 1 |
| Offside Rear Direction indicator obscured |1.5.1a| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Nearside Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Lower Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Central Rear Upper Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Central Front Lower Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Nearside Rear Stop lamp emits other than a steady red light (4.3.3 (a) (ii)) | 1 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Brake fluid contaminated (1.8 (a)) | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Brake cylinder has no reserve travel and braking performance affected |1.1.16 |e| |ii|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Centre Front Headlamp insecure |1.2.3b| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Offside Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Nearside Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Nearside Front Steering lock stop maladjusted |2.1.3| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Brake master cylinder has a seized master cylinder pivot. |3.2.B5| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Rear suspension bearing has excessive free play linkage bearings, |2.4.A2a|i|| | 1 |
| Rear shock absorber insecurely mounted top shock bolt loose |2.4.A.3b| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Rear position lamp adversely affected by the operation of another lamp internal indicator!! |1.1.3b| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Valve stem seriously damaged Rear valve stem rubber perished, Instant deflation possible (5.2.3 (j)) | 1 |
| Front Valve stem seriously damaged Front valve stem rubber perished, Instant deflation possible (5.2.3 (j)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Brake performance not tested due to front fork leaking |1.2.1 |g|| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Horn not working (7.7 (a)) | 1 |
| Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Centre Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Offside Front Throttle operating incorrectly |6.2.1f| | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Headlamp switch insecure |1.2.4| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Direction indicator insecure both |1.5.3b| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Centre Front Upper Horn not working |1.7.3a| | 1 |
| Nearside Front Upper Direction indicator not working |1.5.1c| | 1 |
| Offside Front Upper Direction indicator not working |1.5.1c| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Centre Front Horn not working |1.7.3a| | 1 |
| Outer Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Outer Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Centre Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Front wheel spindle securing nut|s| loose |2.3.3a| | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Headlamp at least one does not illuminate on dipped beam stuck on high beam |1.2.2a|i|| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Front Dipswitch does not operate immediately when selected on main beam |4.1.3 |b|| | 1 |
| Offside 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 |
| Offside Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Rear Lower Suspension rod pin or bush excessively worn tie rod bearing and center bush |5.3.4 |a| |i|| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars Right hand handlebar |2.1.2b| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Offside Handlebar grip missing (2.2.1 (d) (i)) | 1 |
| Nearside Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Offside Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Fuel system component leaking fuel tap (6.1.3 (b) (i)) | 1 |
| Front Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Rear Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Rear reflector likely to become detached (4.8.1 (b) (ii)) | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Steering damper in such a condition that the steering action is impaired. |2.1.2d| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |