| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 56 |
| Drive chain excessively loose |6.2.1d| | 17 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Rear reflector on motorcycle missing |1.4.1| | 13 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Horn not working |1.7.3a| | 10 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Rear reflector missing (4.8.2 (a) (ii)) | 7 |
| Registration plate issues | 7 |
| Handlebar deformed |2.1.1b| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 6 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 5 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Drive chain excessively tight |6.2.1d| | 5 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Horn not working (7.7 (a) (ii)) | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 4 |
| Stop lamp remains on when the brakes are released | 4 |
| Nearside Front Direction indicator not working |1.5.1c| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 3 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front Brake disc contaminated |1.1.14 |b|| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Rear Exhaust system insecure (6.1.2 (a)) | 2 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 2 |
| Front Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Offside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Motorcycle structure corroded to the extent that the rigidity of the assembly is significantly reduced (6.1.1 (c) (i)) | 1 |
| Front Fork yoke insecure centre bolt loose (2.2.2 (d) (i)) | 1 |
| Front Engine mounting/bracket damaged or deteriorated resulting in excessive movement (6.1.8 (a) (i)) | 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 |
| Front Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Drive chain worn to excess No adjustment left on chain adjusters. |6.1.7 |c| |i|| | 1 |
| Front Steering headbearing has excessive wear or free play Headbearings notchy when front wheel raised. |2.2.2 |f| |i|| | 1 |
| Headlamp incorrect colour |1.2.1| | 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 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Drive chain sprocket so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Handlebar so insecure it is likely to become detached |2.2.1 |b| |ii|| | 1 |
| Rear Direction indicator adversely affected by the operation of another lamp |4.4.3 |b|| | 1 |
| Nearside Inner Fuel hose leaking |6.1.3 |b| |i|| | 1 |
| Drive chain excessively tight, so that it is likely to fail |6.1.7 |k| |ii|| | 1 |
| Nearside Rear Lower Motorcycle structure joining/attachment plate or fastening so insecure that structural rigidity is seriously reduced Sprocket lock nuts ineffective, spaced out with washers.. |6.1.1 |b| |ii|| | 1 |
| Front Upper Fork yoke insecure |2.2.2 |d| |i|| | 1 |
| Rear Lower Suspension attachment bracket/mounting insecure Shock block to rear shock absorber bolt only held on by 2 threads, very dangerous. |5.3.3 |a| |i|| | 1 |
| Offside Rear Direction indicator likely to become detached |4.4.1 |c| |ii|| | 1 |
| Offside Front Upper Brake lever is so short that the brake cannot be readily applied |1.1.2 |d|| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension exhaust muffler bent inwards and fouls rear caliper & swingarm |2.4.A.3a| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling circa 15mm measured at front wheel (2.4 (a)) | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts hose insecure |3.2.B2c| | 1 |
| Rear Gradient brake test indicates a binding brake |3.3.D1c| | 1 |
| Rear Gradient brake test indicates a sticking brake |3.3.D1c| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Front Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Front Brake caliper insecure (1.1.16 (c) (i)) | 1 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Front Brake fluid not visible (1.1.10 (d) (iii)) | 1 |
| Front Brake hose excessively damaged (1.1.12 (b) (ii)) | 1 |
| Brake hose leaking at master cylinder, banjo bolt has rubber washers used. (1.1.12 (c)) | 1 |
| Offside Front Shock absorber has a serious fluid leak possibly brake fluid contamination from master cylinder to flexy joint leak (5.3.2 (b)) | 1 |
| Handlebar excessively deformed not positioned centrally, too far to left (2.2.1 (c) (i)) | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Offside Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Rear suspension bearing has excessive free play linkage |2.4.A2a|i|| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Stop lamp not working switch (4.3.1 (a) (ii)) | 1 |
| Rear Brake lever has restricted free movement (1.1.15 (e)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Brake lever is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Stop lamp not working with handle bar lever |4.3.1 |a| |ii|| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Offside Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has a serious fluid leak Fork seal, major leak. (5.3.2 (b)) | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Stop lamp does not illuminate immediately a brake applies front brake control |1.3.1a| | 1 |
| Rear Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Centre Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Rear Lower Drive chain excessively loose |6.2.1d| | 1 |
| Offside Front An item not tested |Manual| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Offside Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Handlebar deformed to the extent that steering is affected (2.2.1 (c) (ii)) | 1 |
| Headlamp reflector missing (4.1.1 (b) (ii)) | 1 |
| Motorcycle structure adversely modified |6.1.1b| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front suspension has inadequate damping effect. bottoms out easily |2.3.6c| | 1 |
| Offside Front suspension assembly component cracked fork bottom, at spindle |2.3.1| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Lower Suspension arm corroded and seriously weakened (5.3.3 (b) (i)) | 1 |
| Rear Brake hose leaking fluid |3.2.B4| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Rear Brake master cylinder has a seized master cylinder pivot. |3.2.B5| | 1 |
| Inner Front Lower Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Inner Rear Lower Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside Front Lower Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Drive chain worn to excess |6.2.1e| | 1 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Rear Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Front Brake lever insecure |1.1.2 |e| |i|| | 1 |
| Decelerometer brake test no brake control achieves an efficiency of 30% |3.3.E1a| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies brake when applied not operating light |1.3.1a| | 1 |
| Offside Handlebar handgrip not secure to handlebars. THROTLE GRIP LOOSE ON BAR |2.1.1c| | 1 |
| Rear mono-shock pivot excessively worn FRONT PIVOT |2.4.B.4| | 1 |
| Rear position lamp adversely affected by the operation of another lamp FLICKERING ABOVE IDLE |1.1.3b| | 1 |
| Front Motorcycle structure excessively corroded frame near lower yoke and engine mount |6.1.1a| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Nearside Direction indicator incorrect colour both (4.4.3 (a)) | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Centre Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Centre Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Centre Rear Drive chain worn to excess |6.2.1e| | 1 |
| Centre Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Rear Suspension arm pin or bush excessively worn swing arm (5.3.4 (a) (i)) | 1 |
| Front Horn not working |7.7 |a| |ii|| | 1 |
| Nearside Handlebar so insecure it is likely to become detached Grip loose (2.2.1 (b) (ii)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Rear Suspension arm corroded and seriously weakened (5.3.3 (b) (i)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Nearside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride chain circlip wrong way round |6.2.1h| | 1 |
| Offside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Offside Front Upper Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Stop lamp not working front brake |4.3.1 |a| |ii|| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Direction indicator not working left rear |4.4.1 |a| |ii|| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Front Stop lamp with a multiple light source more than 1/2 not functioning |4.3.1 |a| |ii|| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected throttle housing insecure |6.2.7 |a| |ii|| | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |
| Drive chain excessively tight |6.1.7 |k| |i|| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |