| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 38 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 20 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 19 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 15 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 13 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 11 |
| Registration plate issues | 10 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 6 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 6 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 4 |
| 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 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 3 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 3 |
| Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Front suspension assembly component excessively bent |2.3.1| | 2 |
| Nearside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Horn not working |1.7.3a| | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Offside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front Front mudguard insecure |2.3.7| | 2 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Front brake disc in such a condition that it is seriously weakened | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Upper Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Lower Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Nearside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Front Headlamp insecure |1.2.3b| | 1 |
| Nearside Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Offside Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Stop lamp not working brake (4.3.1 (a) (ii)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Lower Steering headbearing has excessive free play |2.2.2| | 1 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Brake component damaged and seriously reduced in strength |3.2.A1| | 1 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Rear Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Front Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen due to blown offside bulb |1.6.B.1| | 1 |
| Offside Front Handlebar handgrip not secure to handlebars. grip moves on tube |2.1.1c| | 1 |
| Exhaust is leaking and excessively noisey leaking from head |7.1.1b| | 1 |
| Brake hose is likely to be fouled or trapped by moving parts hose cleat not secure |3.2.B2c| | 1 |
| Nearside Front Shock absorber has a serious fluid leak Front fork (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has a serious fluid leak Front fork (5.3.2 (b)) | 1 |
| Front Brake lining(s) contaminated (1.1.13 (b)) | 1 |
| Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Nearside Front Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Front Shock absorber has negligible damping effect x2 |5.3.2 |b|| | 1 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 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 |
| Rear Brake has no recorded effort at a wheel |1.2.1 |a| |ii|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Brake performance not tested |3.3| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Shock absorber has a serious fluid leak both fork seals (5.3.2 (b)) | 1 |
| Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Steering operation impeded by a fairing (2.1.4 (e)) | 1 |
| Nearside Front Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Front Front position lamp insecure |1.1.1c| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear Brake pipe union leaking fluid |3.2.B4| | 1 |
| Rear Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Offside Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Centre Rear Upper Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Rear Direction indicator likely to become detached |4.4.1 |c| |ii|| | 1 |
| Offside Rear Direction indicator likely to become detached |4.4.1 |c| |ii|| | 1 |
| Rear Brake grabbing severely |1.2.1 |c|| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 1 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Offside Direction indicator missing |1.5.1a| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Front Direction indicator insecure |1.5.3b| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders operation of the controls |2.1.2b| | 1 |
| Fairing insecure and likely to impede the steering |2.1.2e| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Offside Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Nearside Brake lever insecure |3.1.2a| | 1 |
| Nearside Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Offside Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Riders seat insecure |6.2.1a| | 1 |