| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 30 |
| Drive chain excessively loose |6.2.1d| | 16 |
| Drive chain worn to excess |6.2.1e| | 14 |
| Registration plate issues | 14 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 11 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 10 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 10 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Horn not working |1.7.3a| | 8 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 6 |
| Front suspension has inadequate damping effect. |2.3.6c| | 5 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Rear reflector on motorcycle missing |1.4.1| | 5 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Rear Brake disc|s| cracked |3.2.A1g| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Registration plate lamp issues | 4 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Nearside Front Direction indicator not working |1.5.1c| | 4 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 3 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 3 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 3 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Offside Handlebar mounting clamp loose |2.1.1a| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Nearside Rear Footrest missing |6.2.12 |a|| | 2 |
| Offside Rear Footrest missing |6.2.12 |a|| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Handlebar mounting clamp loose |2.1.1a| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 2 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Rear Brake pedal insecure |3.1.2a| | 2 |
| Headlamp insecure (4.1.1 (c)) | 2 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Front Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Brake lever pivots excessively worn |3.1.3a| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Centre Rear Lower Rear shock absorber has inadequate damping effect. no damping
bottoms out |2.4.A.3b| | 1 |
| Centre Front Lower Front shock absorber seal failed and leaking oil both forks leaking oil |2.3.3| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Front Exhaust excessively deteriorated |7.1.1a| | 1 |
| Centre Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Brake hose damaged | 1 |
| Rear Suspension arm corroded and seriously weakened swing arm |5.3.3 |b| |i|| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |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 |
| Front Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Front Upper Brake hose fouling |3.2.B3b| | 1 |
| Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Drive chain excessively tight (6.2.1d) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Fuel hose insecure (6.1.3 (a) (i)) | 1 |
| Riders seat insecure |6.2.5 |a| |ii|| | 1 |
| Offside Rear Brake component has restricted free movement and operation is likely to be impeded Brake pedal fouling exhaust |3.2.A1h| | 1 |
| Front Direction indicator flashing more than 120 times per minute Both nearside and offside |1.5.1c| | 1 |
| Rear Direction indicator flashing more than 120 times per minute Both nearside and offside |1.5.1c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Nearside Front Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Offside Front Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Rear Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Fairing so located that it is likely to impede the steering |2.1.2e| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Brake lever cracked |3.1.2c| | 1 |
| Offside Handlebar mounting clamp bolt missing |2.1.1a| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Offside Exhaust mounting missing |7.1.1c| | 1 |
| Offside Rear Upper Brake caliper insecure Rear brake caliper slide insecure on slide pin fit new nut and secure PRS on test (1.1.16 (c) (i)) | 1 |
| Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Offside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| All direction indicators not working all 4 (4.4.1 (a) (ii)) | 1 |
| Headlamp light intensity severely reduced both dip and main (4.1.4 (a)) | 1 |
| Throttle operating incorrectly insecure and too much free-play (6.2.7 (a) (i)) | 1 |
| Exhaust system insecure Silencer mounting broken (6.1.2 (a)) | 1 |
| Offside Shock absorber has a serious fluid leak fork leg (5.3.2 (b)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected idle speed too high (6.2.7 (a) (ii)) | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front Steering lock stop missing |2.1.3| | 1 |
| Offside Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Offside Rear Brake component has an inadequate repair |3.1.5| | 1 |
| Offside Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Nearside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Central Front Upper Horn not working |1.7.3a| | 1 |
| Nearside Front Upper Fairings so located that it is likely to impede the steering |2.1.2e| | 1 |
| Offside Front Upper Fairings so located that it is likely to impede the steering |2.1.2e| | 1 |
| Offside Rear Lower Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Upper Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Offside Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected Revs not lowering when throttle released |6.2.7 |a| |ii|| | 1 |
| Headlamp not working on main beam Main beam not staying on |4.1.1 |a| |ii|| | 1 |
| 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 |
| Direction indicators not working |1.5.1c| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear reflector on motorcycle does not reflect squarely to the rear |1.4.1| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Shock absorber insecurely attached |5.3.2 |a| |i|| | 1 |
| Position lamp switch faulty |1.1.4a| | 1 |
| Front Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Brake pedal is inoperative |3.1.3c| | 1 |
| Rear Brake hose excessively damaged (1.1.12 (b) (ii)) | 1 |
| Offside Front Footrest insecure (6.2.12 (a)) | 1 |
| Brake pedal insecure (1.1.2 (e) (i)) | 1 |
| Rear Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 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 |
| Rear Brake disc fractured (1.1.14 (a) (ii)) | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Front Position lamp switch does not illuminate all position lamps with a single operation |4.2.2 |a|| | 1 |
| Nearside Indicator tell tale not functioning |1.5.2| | 1 |
| Brake component has an inadequate repair |3.1.5| | 1 |
| Rear Stop lamp not working intermitant (4.3.1 (a) (ii)) | 1 |
| Rear Direction indicator obviously incorrectly positioned to close together (4.4.3 (a)) | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Rear Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 1 |
| Nearside Front Footrest insecure (6.2.12 (a)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |
| Rear Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 1 |
| Headlamp insecure Front headlight/panel insecure. |4.1.1 |c|| | 1 |
| Handlebar so insecure it is likely to become detached L/H bar insecure. |2.2.1 |b| |ii|| | 1 |
| Front Brake caliper inadequately mounted Hitting bobbins on Front brake disc. |1.1.16 |c| |i|| | 1 |
| Rear Shock absorber has a serious fluid leak Rear shock. |5.3.2 |b|| | 1 |
| Front Motorcycle structure joining/attachment plate or fastening insecure Front mudguard insecure. |6.1.1 |b| |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 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Rear suspension fouling which affects the movement of the rear suspension Exhaust mount insecure fouling swinging arm movement |2.4.A.3a| | 1 |
| Brake performance not tested (1.2.1 (g)) | 1 |
| Rear Brake caliper insecure (1.1.16 (c) (i)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Clutch lever positioned so it cannot be readily operated (6.2.7 (b)) | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Chain guard insecure |6.1.7 |i|| | 1 |
| Stop lamp not working front operated |4.3.1 |a| |ii|| | 1 |
| Horn not working (7.7 (a)) | 1 |
| Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |