| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 51 |
| Registration plate issues | 34 |
| Headlamp aim out of alignment | 20 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 12 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 9 |
| Horn not working |1.7.3a| | 9 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 9 |
| Drive chain excessively tight |6.2.1d| | 8 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Riders seat insecure |6.2.1a| | 7 |
| Drive chain excessively loose |6.2.1d| | 6 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Nearside Rear Direction indicators not working |1.5.1c| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 5 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| 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| | 5 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 4 |
| Nearside Front Direction indicators not working |1.5.1c| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 3 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Offside Front Footrest insecure |6.2.1a| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Front Brake component is severely distorted |3.1.5| | 2 |
| Nearside Front Brake component is severely distorted |3.1.5| | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 2 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Offside Front Brake disc|s| insecure |3.2.A1g| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Offside Front Direction indicator insecure |1.5.3b| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Offside Footrest insecure |6.2.1a| | 2 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Offside Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Stop lamp does not illuminate by the operation of both brake controls front not working (4.3.2 (a) (iii)) | 1 |
| Fuel tank leaking (6.1.3 (b) (i)) | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Nearside Front Brake disc|s| securing bolt|s| loose |3.2.A1g| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Offside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Front Brake lever not releasing correctly and functionality of brakes affected Catching on Clocks (1.1.2 (b) (ii)) | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Centre Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Centre Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Rear 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 position lamp obscured more than 50% |1.1.1d| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Offside Rear Exhaust system insecure baffle coming out (6.1.2 (a)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Front Direction indicators not working missing. |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Front wheel bearings are excessively tight |2.3.5b| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Rear Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Rear Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Offside Exhaust mounting missing |7.1.1c| | 1 |
| Rear Brake pedal mounting insecure |3.1.2a| | 1 |
| Brake hose excessively deteriorated | 1 |
| Rear Brake hose which buldges |3.2.B4| | 1 |
| Nearside Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Offside Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Headlamp incorrect colour |1.2.1| | 1 |
| Front Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Centre Rear Lower Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Nearside Front Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Centre Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Nearside Front Headlamp incorrect colour |1.2.1| | 1 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Nearside Front Footrest missing |6.2.1a| | 1 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Nearside Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Nearside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Offside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Brake pipe union leaking fluid |3.2.B4| | 1 |
| Rear Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Rear position lamp does not face the rear |1.1.1d| | 1 |
| Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Upper Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Centre Front Horn control defective |1.7.2a| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Nearside Front Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Nearside Rear Position lamp not working (4.2.1 (a)) | 1 |
| Nearside Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Registration plate lamp issues | 1 |
| Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Front Front position lamp missing |1.1.1a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Nearside Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Brake pedal is inoperative |3.1.3c| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Brake hose leaking fluid front brake hose caliper to caliper ferule corroded and leaking |3.2.B4| | 1 |
| Central Rear Lower Rear suspension bearing has excessive free play lower linkage has excessive free play |2.4.A2a|i|| | 1 |
| Central Rear Rear suspension bearing has excessive free play rear swing arm has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Indicator switch insecure |1.5.4| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Offside Rear Position lamp not working (4.2.1 (a)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Rear Lower Suspension component ball joint excessively worn lower bush worn out (5.3.4 (a) (i)) | 1 |
| Drive chain sprocket so worn it is likely to fail one tooth has snapped (6.1.7 (c) (ii)) | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Stop lamp with a multiple light source more than 1/2 not functioning (4.3.1 (a) (ii)) | 1 |
| Offside Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Offside Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Offside Headlamp switch insecure |1.2.4| | 1 |
| Wheel corroded significantly reducing the original strength |4.2.1a| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Brake lever pivots excessively worn |3.1.3a| | 1 |
| Front Brake component is excessively corroded |3.1.5| | 1 |
| Front Brake component is severely distorted |3.1.5| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Offside Front suspension assembly component cracked |2.3.1| | 1 |