| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 46 |
| Drive chain excessively loose |6.2.1d| | 22 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 11 |
| Registration plate issues | 10 |
| Horn not working |1.7.3a| | 10 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Headlamp aim beam image kick up to the offside |1.6| | 6 |
| Drive chain worn to excess |6.2.1e| | 6 |
| Drive chain excessively tight |6.2.1d| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 3 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Rear Drive chain excessively tight |6.2.1d| | 2 |
| Front Brake excessively binding |1.2.1 |f|| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Offside Front Brake lever has insufficient reserve travel |1.1.2 |a|| | 2 |
| Offside Handlebar deformed |2.1.1b| | 2 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Nearside Rear Lower Drive chain excessively loose |6.2.1d| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Rear Brake pedal anti-slip provision missing |1.1.2 |c|| | 1 |
| Exhaust excessively deteriorated silencer joint |7.1.1a| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Centre Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Offside Rear Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Plate brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.B2b| | 1 |
| Offside Handlebar deformed to the extent that steering is affected Clip on seriously bent makes contact with tank |2.2.1 |c| |ii|| | 1 |
| Wheel alignment incorrect which adversely affects the handling when wheel is pointing straight fork yoke is angled to the left |2.4 |a|| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Brake grabbing severely Front brake can???t be applied smoothly |1.2.1 |c|| | 1 |
| Brake pedal anti-slip provision loose Rear brake pedal anti slip rubber |1.1.2 |c|| | 1 |
| Nearside Front Footrest insecure Circlip missing |6.2.12 |a|| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected Cable insecure |6.2.7 |a| |ii|| | 1 |
| Rear Brake disc contaminated engine oil leak (1.1.14 (b)) | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Clutch lever shortened so it cannot be readily operated |6.2.7 |b|| | 1 |
| Rear Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Rear Direction indicators affected by the operation of another lamp both |1.5.1c| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Offside Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride offside chain adjuster loose |6.2.1h| | 1 |
| Nearside Rear Upper Footrest missing |6.2.1a| | 1 |
| Offside Front Upper Handlebar deformed |2.1.1b| | 1 |
| Offside Front Upper Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Brake performance not tested (1.2.1 (g)) | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Front Front position lamp missing |1.1.1a| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Shock absorber has a serious fluid leak Left fork leg leaking oil (5.3.2 (b)) | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Front Brake lagging in operation |1.2.1 |d|| | 1 |
| Front Motorcycle structure joining/attachment plate or fastening so insecure that structural rigidity is seriously reduced screen |6.1.1 |b| |ii|| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Rear Drive chain excessively loose (6.2.1d) | 1 |
| Front Brake lever excessively chafed (3.2.A1a) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Front Roller brake test indicates a binding brake (3.3.A1a) | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Brake grabbing severely (1.2.1 (c)) | 1 |
| Central Front Horn not working (7.7 (a) (ii)) | 1 |
| Front suspension assembly component missing |2.3.1| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Fuel cap ineffective (6.1.3 (b) (i)) | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Handlebar deformed |2.1.1b| | 1 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Rear Lower Shock absorber has an excessively worn bush |5.3.2 |c|| | 1 |
| Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Nearside Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Offside Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Nearside Rear Motorcycle structure joining/attachment plate or fastening insecure (6.1.1 (b) (i)) | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Offside Front Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Headlamp damaged and function impaired |1.2.3a| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Nearside Front Direction indicator missing |1.5.1a| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Registration plate lamp issues | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Nearside Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Nearside Front Upper Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Nearside Front Upper Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Position lamp showing white light to the rear (4.2.3 (a) (ii)) | 1 |
| Rear Exhaust system insecure (6.1.2 (a)) | 1 |
| Handlebar fouling on the fuel tank or bodywork on full lock right hand side (2.1.4 (b)) | 1 |
| Valve stem seriously damaged rear (5.2.3 (j)) | 1 |
| Exhaust silencer likely to become detached (8.1.1 (b) (ii)) | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Centre Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Central Rear Stop lamp not working stop lamp not illuminating on operation of front brake (4.3.1 (a) (ii)) | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front 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 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear Rear suspension component seized |2.4A2a|ii|| | 1 |
| Drive chain horseshoe locking device likely to become detached locking clip missing |6.1.7 |j| |ii|| | 1 |
| Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front An item not tested |Manual| | 1 |
| Nearside Rear Lower Drive chain worn to excess |6.2.1e| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |