| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 36 |
| Registration plate lamp issues | 33 |
| Rear reflector missing (4.8.2 (a) (ii)) | 32 |
| Registration plate issues | 15 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 11 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 10 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 9 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 7 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 5 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 5 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 5 |
| Rear Brake excessively binding (1.2.1 (f)) | 4 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 4 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 4 |
| Front Brake excessively binding (1.2.1 (f)) | 4 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 2 |
| 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)) | 2 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 2 |
| Nearside Rear Footrest insecure (6.2.12 (a)) | 2 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Front Stop lamp not working lever (4.3.1 (a) (ii)) | 1 |
| Throttle operating incorrectly revs increase on full lock (6.2.7 (a) (i)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls front brake (4.3.2 (a) (iii)) | 1 |
| Rear Brake pedal is bent and the brake cannot be readily applied return spring missing (1.1.2 (d)) | 1 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Suspension attachment bracket/mounting insecure swinging arm bolt nut loose (5.3.3 (a) (i)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Nearside Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Nearside Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Central Rear Suspension arm pin or bush likely to become detached (5.3.4 (a) (ii)) | 1 |
| Footrest insecure locking pin missing, bent so surfer rear brake cannot be operated correctly (6.2.12 (a)) | 1 |
| Front Position lamp not working both (4.2.1 (a)) | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Suspension arm attachment bracket/mounting insecure (5.3.3 (a) (i)) | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Central Front Lower Steering headbearing has excessive wear or free play steering head bearings loose (2.2.2 (f) (i)) | 1 |
| Front Headlamp not working on main beam no main beam (4.1.1 (a) (ii)) | 1 |
| Stop lamp not working Front lever (4.3.1 (a) (ii)) | 1 |
| Offside Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Steering headbearing has excessive wear or free play freeplay (2.2.2 (f) (i)) | 1 |
| Brake rod insecure no locking nut and likely to come un attached (also bent) (1.1.15 (c)) | 1 |
| All direction indicators not working intermitent indicating wiring fault (4.4.1 (a) (ii)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Motorcycle structure has a fracture which is likely to adversely affect braking or steering |6.1.1 |a| |ii|| | 1 |
| Motorcycle structure is so deformed it is likely to adversely affect braking or steering |6.1.1 |a| |ii|| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.4 |a|| | 1 |
| Brake grabbing severely |1.2.1 |c|| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Front Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Drive chain horseshoe locking device likely to become detached (6.1.7 (j) (ii)) | 1 |
| Rear Brake caliper insecurely mounted and braking performance affected (1.1.16 (c) (ii)) | 1 |
| Front Brake fluid contaminated (1.8 (a)) | 1 |
| Rear Brake fluid contaminated (1.8 (a)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Stop lamp emits other than a steady red light (4.3.3 (a) (ii)) | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Suspension rod pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Offside Rear Wheel fixing loose (single fixing) chain tensioner (5.2.1 (a) (ii)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls Front switch (4.3.2 (a) (iii)) | 1 |
| Offside Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Rear Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Offside Rear Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Offside Front Brake lever is so short that the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Rear Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Offside Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Rear Motorcycle structure joining/attachment plate or fastening insecure (6.1.1 (b) (i)) | 1 |
| Front Brake lever is so short that the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected throttle increases revs when handlebars are turned (6.2.7 (a) (ii)) | 1 |
| Rear Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Rear 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 Brake fluid reservoir fluid level significantly below minimum level (1.1.10 (d) (ii)) | 1 |
| Front Brake lever insecure (1.1.2 (e) (i)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Central Rear Rear reflector missing Reflector fitted (4.8.2 (a) (ii)) | 1 |
| Offside Handlebar excessively deformed bent up (2.2.1 (c) (i)) | 1 |
| Front Valve stem seriously damaged perished (5.2.3 (j)) | 1 |
| Rear Suspension arm pin or bush excessively worn swing arm-or loose (5.3.4 (a) (i)) | 1 |
| Front Brake grabbing severely master cyl piston needs lube (1.2.1 (c)) | 1 |
| Footrest missing both passenger (6.2.12 (a)) | 1 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Exhaust system insecure bracket broken , and silencer restricts rear suspension travel. (6.1.2 (a)) | 1 |
| Rear Suspension component mounting modified so the suspension is likely to fail other components Rear suspension fouling exhaust. Rear suspension travel hindered. (5.3.3 (c) (ii)) | 1 |
| Rear Lower Suspension arm ball joint likely to become detached (5.3.4 (a) (ii)) | 1 |
| Rear Suspension arm insecure and control of the motorcycle impaired (5.3.3 (a) (ii)) | 1 |
| Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Rear reflector defective or damaged by more than 50% of the reflecting surface (4.8.1 (a) (ii)) | 1 |
| Rear Footrest insecure (6.2.12 (a)) | 1 |
| Headlamp incorrect colour (4.1.4 (a)) | 1 |
| Steering headbearing excessively stiff or notchy head race worn and knotchy front wheel raised (2.2.2 (f) (i)) | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Brake pedal so insecure that the brake cannot be readily applied (1.1.2 (e) (ii)) | 1 |
| Central Rear Stop lamp does not illuminate by the operation of both brake controls Not operating on operation of front brake control (4.3.2 (a) (iii)) | 1 |
| Nearside Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls front brake light switch not working - PRS - clean contacts & test (4.3.2 (a) (iii)) | 1 |
| Front Brake caliper insecurely mounted and braking performance affected (1.1.16 (c) (ii)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Offside Front Upper Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Front Upper Dipswitch does not operate immediately when selected on main beam (4.1.3 (b)) | 1 |
| Nearside Front Upper Horn not working (7.7 (a) (ii)) | 1 |
| Offside Rear Lower All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Rear Brake pedal insecure (1.1.2 (e) (i)) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Brake pedal has insufficient reserve travel TOO MUCH TRAVEL (1.1.2 (a)) | 1 |
| Brake lagging in operation TOO MUCH TRAVEL (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 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Front All direction indicators adversely affected by the operation of another lamp (4.4.3 (b)) | 1 |
| Forks in such a condition that steering control is adversely affected (2.2.2 (d) (ii)) | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Front Wheel fixing missing (single fixing) (5.2.1 (a) (ii)) | 1 |
| Brake fluid contaminated front & rear (1.8 (a)) | 1 |
| Drive chain sprocket so loose it is likely to fail rear sprocket carrier bearing (6.1.7 (c) (ii)) | 1 |
| Rear Suspension arm attachment bracket/mounting damaged and seriously weakened (5.3.3 (b) (i)) | 1 |
| Rear Brake fluid significantly below minimum mark (1.1.10 (d) (ii)) | 1 |
| Drive chain worn to excess tight spots also (6.1.7 (c) (i)) | 1 |