| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 61 |
| Drive chain excessively loose |6.2.1d| | 21 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 14 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 14 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 13 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 12 |
| Front wheel bearings have excessive free play |2.3.5b| | 10 |
| Registration plate issues | 10 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 10 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 8 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 6 |
| Drive chain excessively tight |6.2.1d| | 6 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 5 |
| Throttle operating incorrectly |6.2.1f| | 5 |
| Front wheel bearings are excessively rough |2.3.5b| | 5 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 5 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Front Brake excessively binding (1.2.1 (f)) | 4 |
| Horn not working |1.7.3a| | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 3 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Rear Brake disc|s| cracked |3.2.A1g| | 3 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Nearside Front Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 3 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Rear Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Offside Front Direction indicator insecure |1.5.3b| | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Registration plate lamp issues | 2 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 2 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Offside Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 2 |
| Nearside Front Brake disc|s| insecure |3.2.A1g| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Offside Front position lamp missing |1.1.1a| | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Lower Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Brake lever pivot excessively tight |1.1.1 |a|| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride fork clamp bolt missing |6.2.1h| | 1 |
| Front Brake fluid reservoir fluid level significantly below minimum level |1.1.10 |d| |ii|| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Rear Lower Suspension component pin or bush excessively worn |5.3.4 |a| |i|| | 1 |
| Nearside Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Nearside Rear Motorcycle structure joining/attachment plate or fastening so insecure that structural rigidity is seriously reduced (6.1.1 (b) (ii)) | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Brake lining(s) less than 1.0 mm thick (1.1.13 (a)) | 1 |
| Nearside Front Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Stop lamp does not illuminate immediately a brake applies rear switch |1.3.1a| | 1 |
| Front Wheel bearing play so excessive that directional control is impaired |5.1.3 |a| |ii|| | 1 |
| Rear Lower Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Nearside Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Offside Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Headlamp missing |1.2.3a| | 1 |
| Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Front An item not tested |Manual| | 1 |
| Front Exhaust excessively deteriorated |7.1.1a| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Nearside Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Offside Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Rear Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected Sticking (6.2.7 (a) (ii)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Front Brake lever has inadequate reserve travel (3.1.3b) | 1 |
| Nearside Front Direction indicators not working (1.5.1c) | 1 |
| Front Brake lever has inadequate reserve travel hitting throttle barrel (3.1.3b) | 1 |
| Nearside Front Direction indicator not working (1.5.1c) | 1 |
| Nearside Front Direction indicator insecure (1.5.3b) | 1 |
| Throttle operating incorrectly (6.2.1f) | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil (2.3.3) | 1 |
| Lower Rear suspension bearing has excessive free play (2.4.A2a(i)) | 1 |
| Steering headbearing has excessive free play (2.2.2) | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Exhaust has part of the system missing |7.1.1a| | 1 |
| Throttle operating incorrectly Will not close down |6.2.1f| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Nearside Front Front position lamp incorrect colour |1.1.2a| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 1 |
| Rear wheel bearings are excessively tight |2.4.A.2c| | 1 |
| Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Brake component leaking fluid |3.2.B4| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Clutch lever shortened so it cannot be readily operated (6.2.7 (b)) | 1 |
| Offside Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Front Brake cylinder insecurely mounted |3.2.B1a| | 1 |
| Rear Brake cylinder insecurely mounted |3.2.B1a| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Central Rear Stop lamp not working hand brake (4.3.1 (a) (ii)) | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Offside Front Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Brake pipe inadequately supported |3.2.B2b| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Nearside Rear Lower Drive chain excessively loose |6.2.1d| | 1 |
| Nearside Front Brake disc|s| securing bolt|s| loose disc slightly worn on disc bobbings |3.2.A1g| | 1 |
| Offside Front Brake disc|s| securing bolt|s| loose disc slightly worn on disc bobbings |3.2.A1g| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies does not work off front brake |1.3.1a| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear Lower Drive chain worn to excess |6.2.1e| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Offside Front Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Direction indicators flashing more than 120 times per minute ALL INDICATORS |1.5.1c| | 1 |
| Exhaust mounting missing FRONT CLAMP MISSING |7.1.1c| | 1 |
| Rear suspension bearing has excessive free play ALL BEARINGS ON PIVOT LINKAGE HAS EXCESSIVE PLAY |2.4.A2a|i|| | 1 |
| Rear Rear suspension bearing excessively deteriorated SHOCKABSORBER LOWER BEARING HAS EXCESSIVE PLAY |2.4A.2a|i|| | 1 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Nearside Front Footrest insecure locking device missing |6.2.12 |a|| | 1 |
| Nearside Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Nearside Front Wheel bearing has excessive play sprocket carrier bearing (5.1.3 (a) (i)) | 1 |
| Rear Suspension arm insecurely attached (5.3.3 (a) (i)) | 1 |
| Footrest insecure rear |6.2.12 |a|| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Front Floor brake test indicates a severely grabbing brake |3.3.C2d| | 1 |
| Rear Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Brake disc fractured (1.1.14 (a) (ii)) | 1 |
| Rear Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Brake effort inadequate at a wheel |1.2.1 |a| |i|| | 1 |
| Brake disc|s| securing bolt|s| loose brake buttons worn |3.2.A1g| | 1 |
| Headlamp aim headlamp deteriorated and function impaired main beam only |1.2.3a| | 1 |
| Offside Front Shock absorber has a serious fluid leak Fork seal leaking |5.3.2 |b|| | 1 |
| Suspension component pin or bush excessively worn Rear swingarm bearing |5.3.4 |a| |i|| | 1 |
| Rear Brake caliper insecure |1.1.16 |c| |i|| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Suspension rod pin or bush excessively worn (5.3.4 (a) (i)) | 1 |