| Most common failures | No# failures |
|---|
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 22 |
| Headlamp aim out of alignment | 18 |
| Stop lamp remains on when the brakes are released | 12 |
| Drive chain excessively loose |6.2.1d| | 11 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 9 |
| Registration plate issues | 8 |
| Front wheel bearings are excessively rough |2.3.5b| | 7 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Stop lamp remains on when the brake is released |1.3.1e| | 6 |
| Drive chain worn to excess |6.2.1e| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Front Brake excessively binding (1.2.1 (f)) | 5 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 5 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 5 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Rear Drive chain excessively loose |6.2.1d| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Drive chain sprocket worn to excess |6.2.1e| | 3 |
| 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| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 3 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Horn not working |1.7.3a| | 2 |
| Front Brake excessively binding |1.2.1 |f|| | 2 |
| Rear Wheel spoke excessively loose |4.2.1b| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Rear 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%. |3.3.A2b| | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Stop lamp does not illuminate immediately a brake applies control 2 |1.3.1a| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Offside Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Nearside Drive chain worn to excess |6.2.1e| | 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 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Offside Rear Brake lining|s| less than 1.0 mm thick |1.1.13 |a|| | 1 |
| Central Rear Position lamp likely to become detached |4.2.1 |c| |ii|| | 1 |
| Nearside Rear Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Floor brake test No brake control achieves an efficiency of 30% |1.2.2 |a| |i|| | 1 |
| Front Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Roller brake test brake efficiency less than 27.5% overall (1.2.2 (a) (ii)) | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Front Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Rear Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Stop lamp does not illuminate immediately a brake applies Front control |1.3.1a| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Rear Brake lining(s) less than 1.0 mm thick (1.1.13 (a)) | 1 |
| Offside Brake pedal insecure no retainer clip on pivot |1.1.2 |e| |i|| | 1 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Registration plate lamp issues | 1 |
| Stop lamp not working on brake foot pedal. |4.3.1 |a| |ii|| | 1 |
| Offside Exhaust system insecure |6.1.2 |a|| | 1 |
| 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|| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.4 |a|| | 1 |
| Nearside Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Centre Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Wheel spoke missing |5.2.2 |d|| | 1 |
| Rear Wheel spoke excessively bent |5.2.2 |d|| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Rear Wheel spoke excessively bent |4.2.1b| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Fuel cap ineffective (6.1.3 (b) (i)) | 1 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Front Brake hose excessively kinked |3.2.B3a| | 1 |
| Throttle operating incorrectly throttle swich loose |6.2.1f| | 1 |
| Exhaust system insecure |6.1.2 |a|| | 1 |
| Fuel cap ineffective unable to inspect |6.1.3 |b| |i|| | 1 |
| Rear Stop lamp switch with a delay in operation |4.3.2 |a| |ii|| | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Front Brake lever has abnormal movement of levers indicating excessive wear or maladjustment (1.1.15 (f)) | 1 |
| Front Suspension component likely to fail left side is leaking oil fork leg (5.3.3 (b) (ii)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| 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)) | 1 |
| Exhaust system insecure (6.1.2 (a)) | 1 |
| Front Suspension arm attachment bracket/mounting insecure Mudguard insecure (5.3.3 (a) (i)) | 1 |
| Headlamp light intensity severely reduced (4.1.4 (a)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Rear Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Nearside Drive chain excessively tight |6.2.1d| | 1 |
| Stop lamp light intensity significantly reduced |4.3.3 |a| |ii|| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Brake pedal is inoperative |3.1.3c| | 1 |
| Brake lever is inoperative |3.1.3c| | 1 |
| Handlebar retaining device loose |2.2.1 |b| |i|| | 1 |
| Offside Handlebar deformed |2.1.1b| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Pillion seat insecure (6.2.6 (a) (ii)) | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Rear Drive chain sprocket excessively loose |6.1.7 |c| |i|| | 1 |
| Rear Plate brake test indicates a sticking brake |3.3.B1a| | 1 |
| Handlebar excessively deformed (2.2.1 (c) (i)) | 1 |
| Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Stop lamp does not illuminate immediately a brake applies Sticky switch |1.3.1a| | 1 |
| Handlebar deformed to the extent that steering is affected (2.2.1 (c) (ii)) | 1 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Front Brake fluid contaminated |1.8 |a|| | 1 |
| Front Brake fluid contaminated (1.8 (a)) | 1 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front Wheel spindle or securing nut(s) so insecure that wheel security or steering control is adversely affected (5.2.1 (c) (ii)) | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Front Brake caliper insecurely mounted and braking performance affected (1.1.16 (c) (ii)) | 1 |
| Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Motorcycle structure joining/attachment plate or fastening insecure chain gaurd (6.1.1 (b) (i)) | 1 |
| Central Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Rear Exhaust silencer insecure (8.1.1 (b) (i)) | 1 |