| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 55 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 20 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Horn not working |1.7.3a| | 14 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 13 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 11 |
| Registration plate issues | 10 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Front wheel bearings are excessively rough |2.3.5b| | 7 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 6 |
| Headlamp aim beam image kick up to the offside |1.6| | 6 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Riders seat insecure |6.2.1a| | 5 |
| Throttle operating incorrectly |6.2.1f| | 5 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Nearside Front Direction indicator not working |1.5.1c| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Brake hose excessively deteriorated | 3 |
| Nearside Front Brake pipe inadequately supported |3.2.B2b| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 3 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Offside Fuel system component leaking |7.2.1a| | 2 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Nearside Direction indicators not working |1.5.1c| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Offside Steering lock stop maladjusted |2.1.3| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Offside Front Brake cylinder leaking hydraulic fluid |3.2.B1e| | 2 |
| Front suspension assembly component loose |2.3.1| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Horn not working |1.6.2a| | 2 |
| Brake pedal insecure |3.1.2a| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 2 |
| Sidecar attachment insecure |5.1.1b| | 2 |
| Fuel system component insecure |7.2.1b| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Fuel system component leaking (6.1.3 (b) (i)) | 2 |
| Rear Brake lever excessively corroded |3.2.A1c| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Nearside Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Sidecar front position lamp incorrect colour |1.1.2a| | 1 |
| Stop lamp affected by the operation of another lamp Sidecar |1.3.2| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Nearside Front Brake pipe union leaking fluid |3.2.B4| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Front Riders seat insecure |6.2.1a| | 1 |
| Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Brake pedal is inoperative |3.1.3c| | 1 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Nearside Steering lock stop maladjusted |2.1.3| | 1 |
| Rear wheel bearings are excessively tight |2.4.A.2c| | 1 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Fuel hose leaking OFFSIDE FUEL HOSE LEAKING, NO HOSE CLAMPS FITTED. |7.2.1a| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Offside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Front Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Offside Front Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Rear Brake lining|s| contaminated |1.1.13 |b|| | 1 |
| Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Front Front wheel spindle securing nut|s| loose |2.3.5a| | 1 |
| Offside Front Upper Fuel hose leaking |7.2.1a| | 1 |
| Nearside Front Upper Fuel hose leaking |7.2.1a| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Centre Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Nearside Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Offside Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Brake pedal attachment screws loose |3.1.2b| | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Offside Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Direction indicators not working broken stem |1.5.1c| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| All direction indicators not working not flashing |4.4.1 |a| |ii|| | 1 |
| Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Rear Brake drum|s| insecure |3.2.A1g| | 1 |
| Front Fairing so located that it is likely to impede the steering |2.1.2e| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Stop lamp|s| not working |4.3.1 |a| |ii|| | 1 |
| Parking brake lever has no reserve travel |3.1.6b| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Fuel system component leaking |7.2.1a| | 1 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Offside Front Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Offside Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies lever |1.3.1a| | 1 |
| Nearside Rear suspension component excessively corroded. |2.4.A.1a| | 1 |
| Offside Rear suspension component excessively corroded. |2.4.A.1a| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Nearside Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Offside Upper Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Offside Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Front Brake hose leaking fluid |3.2.B4| | 1 |
| Front Brake pipe inadequately supported |3.2.B2b| | 1 |
| Steering headbearing in such a condition that steering control is adversely affected |2.2.2 |f| |ii|| | 1 |
| Nearside Front Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Front Upper Brake pipe likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Rear fog lamp missing |1.3.2a| | 1 |
| Rear reflector missing |1.5.1a| | 1 |
| Front Brake pipe inadequately supported |3.6.B.1| | 1 |
| Rear Brake master cylinder insecurely mounted |3.6.G.1a| | 1 |
| Offside Rear Brake pipe kinked |3.6.B.2b| | 1 |
| Footrest insecure |6.2.1a| | 1 |
| Rear Brake linkage excessively damaged |3.2.A1c| | 1 |
| Rear Brake lining|s| contaminated by oil or grease |3.2.A1k| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Nearside Fuel pipe union leaking |7.2.1a| | 1 |
| Stop lamp not working from handle bar lever |4.3.1 |a| |ii|| | 1 |
| Stop lamp deteriorated and function impaired very dim |1.3.3a| | 1 |
| Sidecar wheel bearings are excessively rough |5.2.3d| | 1 |
| Front Front position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Rear Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Inner Horn not working |1.7.3a| | 1 |
| Steering damper in such a condition that the steering action is impaired. |2.1.2d| | 1 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Front Steering lock stop ineffective |2.1.3| | 1 |
| Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Rear Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Front Brake hose leaking fluid |3.2.B4| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Stop lamp not working front brake lever |4.3.1 |a| |ii|| | 1 |
| Fuel cap mounting flange/sealing method defective |7.2.2c| | 1 |
| Rear Riders seat insecure |6.2.1a| | 1 |
| Rear Fuel system component insecure |7.2.1b| | 1 |
| Centre Riders seat insecure |6.2.1a| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Steering movement excessively `notchy` with the wheel raised Notch seemed to come and go, in different positions of the handlebars. |2.2.1b| | 1 |
| Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |
| Front Fuel cap does not fasten securely by a positive means |7.2.2b| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Parking brake lever ratchet not holding correctly (1.1.6 (a)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Front All direction indicators obviously incorrectly positioned Displaying Light to the side - Not Clearly giving an Indication Signal to the front of motorcycle (4.4.3 (a)) | 1 |
| Rear All direction indicators obviously incorrectly positioned Indicators positioned too close to Brake Light / Sidelight - Not Clearly giving an Indication Signal to the front of motorcycle (4.4.3 (a)) | 1 |
| Rear Stop lamp not working When Rear Brake is Applied (4.3.1 (a) (ii)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected Throttle Not Returning back to Idle speed position when released (6.2.7 (a) (ii)) | 1 |
| Rear Brake lagging in operation (1.2.1 (d)) | 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 not working brake lever (4.3.1 (a) (ii)) | 1 |
| Rear Stop lamp not working brake pedal (4.3.1 (a) (ii)) | 1 |
| All direction indicators not working not flashing (4.4.1 (a) (ii)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. (3.3.A2b) | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Fuel pipe so insecure there is a risk of fire (6.1.3 (a) (ii)) | 1 |
| Front Fuel pipe leaking (6.1.3 (b) (i)) | 1 |
| Gradient brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Headlamp light source and lamp not compatible (4.1.4 (c)) | 1 |
| All direction indicators not working all indicators not working (4.4.1 (a) (ii)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Offside Front Brake caliper leaking and braking performance affected (1.1.16 (b) (ii)) | 1 |
| Nearside Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Nearside Fuel system component leaking Nearside carburettor leaking (6.1.3 (b) (i)) | 1 |
| Offside Fuel system component leaking Offside carburettor leaking (6.1.3 (b) (i)) | 1 |
| Offside Front Brake disc fractured Brake disc cracked (1.1.14 (a) (ii)) | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Outer Front Roller brake test indicates a binding brake (3.3.A1a) | 1 |
| Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Nearside Front Footrest insecure (6.2.12 (a)) | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Headlamp aim not tested (4.1.2 (b)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |