| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 23 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 17 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 11 |
| Rear Position lamp not working (4.2.1 (a)) | 9 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 9 |
| Stop lamp remains on when the brakes are released | 6 |
| Front Brake excessively binding (1.2.1 (f)) | 6 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 5 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 5 |
| Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Headlamp aim not tested (4.1.2 (b)) | 5 |
| Registration plate issues | 5 |
| Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 4 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 4 |
| Drive chain excessively loose |6.2.1d| | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 3 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 3 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| All position lamps not working (4.2.1 (a)) | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Rear Brake excessively binding |1.2.1 |f|| | 2 |
| Front Position lamp not working |4.2.1 |a|| | 2 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 2 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 2 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Exhaust system insecure |6.1.2 |a|| | 2 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied (1.1.2 (d)) | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 2 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 2 |
| Registration plate lamp issues | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Riders seat insecure |6.2.1a| | 1 |
| Brake clevis joint insecure Rear |1.1.15 |c|| | 1 |
| Riders seat insecure |6.2.5 |a| |ii|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Stop lamp does not illuminate immediately a brake applies rear |1.3.1a| | 1 |
| Brake locking device missing rear brake arm |3.2.A1e| | 1 |
| Front Brake fluid reservoir severely damaged |3.2.B1b| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear Roller brake test indicates a severely grabbing brake sever noise when brake applied |3.3.A1b| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Front All position lamps do not illuminate immediately when switched on inop |1.1.3a| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear Brake rod insecure |1.1.15 |c|| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Stop lamp not working rear brake |4.3.1 |a| |ii|| | 1 |
| Handlebar excessively deformed |2.2.1 |c| |i|| | 1 |
| Rear Stop lamp not working REAR BRAKE |4.3.1 |a| |ii|| | 1 |
| Rear Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Front Brake master cylinder leaking |1.1.10 |b| |ii|| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Nearside Rear Footrest missing |6.2.12 |a|| | 1 |
| Offside Rear Footrest missing |6.2.12 |a|| | 1 |
| Front Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Exhaust silencer likely to become detached |8.1.1 |b| |ii|| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Nearside Rear Direction indicator missing |4.4.1 |a| |ii|| | 1 |
| Upper Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Front Brake hose excessively twisted |1.1.12 |b| |ii|| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Front Brake performance not tested |1.2.1 |g|| | 1 |
| Offside Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Rear Brake lever pivot has excessive free play Actuating lever loose on splines. |1.1.1 |b|| | 1 |
| Front Valve stem seriously damaged perished |5.2.3 |j|| | 1 |
| Rear Valve stem seriously damaged perished |5.2.3 |j|| | 1 |
| Valve stem seriously damaged both |5.2.3 |j|| | 1 |
| Front Valve stem seriously damaged Front valve stem perished |5.2.3 |j|| | 1 |
| Rear Valve stem seriously damaged Rear valve stem perished |5.2.3 |j|| | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Wheel bearing has excessive play Rear |5.1.3 |a| |i|| | 1 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Position lamp not working |4.2.1 |a|| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Forks excessively deformed stanchions twisted in the yokes |2.2.2 |d| |i|| | 1 |
| Indicator switch inoperative (4.4.2 (a) (ii)) | 1 |
| Front Brake grabbing severely (1.2.1 (c)) | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Rear Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Rear Footrest missing both missing (6.2.12 (a)) | 1 |
| Motorcycle structure joining/attachment plate or fastening so insecure that structural rigidity is seriously reduced rear exhaust/footrest mount plate (6.1.1 (b) (ii)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Stop lamp switch with a delay in operation Comes on after brake has been aplied (4.3.2 (a) (ii)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Offside Rear Direction indicator incorrect colour (4.4.3 (a)) | 1 |
| Front Horn not working (7.7 (a) (ii)) | 1 |
| Offside Rear Exhaust system insecure Fouling Swinging Arm (6.1.2 (a)) | 1 |
| Nearside Rear Exhaust system insecure Exhaust Fouling Swing Arm (6.1.2 (a)) | 1 |
| Nearside Rear Exhaust system insecure Exhaust Exiting into suspension component (6.1.2 (a)) | 1 |
| Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Roller brake test brake efficiency less than 27.5% overall (1.2.2 (a) (ii)) | 1 |
| Central Front Suspension component corroded and seriously weakened Both Front Fork Tubes Are Excessively Corroded (5.3.3 (b) (i)) | 1 |
| Central Rear Stop lamp not working When Rear Brake Applied (4.3.1 (a) (ii)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Valve stem seriously damaged Badly Split (5.2.3 (j)) | 1 |
| Rear Valve stem seriously damaged Badly Split (5.2.3 (j)) | 1 |
| Nearside Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Offside Shock absorber has a serious fluid leak fork seal (5.3.2 (b)) | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Rear Footrest missing both. (6.2.12 (a)) | 1 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Headlamp aim not tested no dip beam (4.1.2 (b)) | 1 |
| Position lamp not working (4.2.1 (a)) | 1 |
| Headlamp light source and lamp not compatible (4.1.4 (c)) | 1 |
| Stop lamp not working rear brake (4.3.1 (a) (ii)) | 1 |
| Front Brake master cylinder leaking (1.1.10 (b) (ii)) | 1 |
| Rear Suspension arm attachment bracket/mounting insecure torque arm split pin missing (5.3.3 (a) (i)) | 1 |
| Rear Drive chain sprocket so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Brake lever is positioned so that the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Rear Exhaust system insecure (6.1.2 (a)) | 1 |
| Rear Position lamp missing (4.2.1 (a)) | 1 |
| Rear Stop lamp not working brake light not working when rear brake applied (4.3.1 (a) (ii)) | 1 |
| Rear Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 1 |
| Fuel tank leaking excessively or a risk of fire (6.1.3 (b) (ii)) | 1 |
| Handlebar retaining device loose (2.2.1 (b) (i)) | 1 |
| Central Rear All position lamps not working (4.2.1 (a)) | 1 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 1 |
| Suspension arm pin or bush excessively worn excessive play in swingarm (5.3.4 (a) (i)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Rear Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Central Front Position lamp not working (4.2.1 (a)) | 1 |
| Central Rear Position lamp not working (4.2.1 (a)) | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Rear Brake grabbing severely (1.2.1 (c)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Front Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Motorcycle structure is deformed and structural rigidity is significantly reduced (6.1.1 (a) (i)) | 1 |
| Offside Rear Lower Wheel spindle locking device missing (5.2.1 (d)) | 1 |
| Rear Valve stem seriously misaligned (5.2.3 (j)) | 1 |
| Stop lamp not working when brake pedal applied (4.3.1 (a) (ii)) | 1 |
| Exhaust has a major leak of exhaust gases Manifold (6.1.2 (a)) | 1 |
| Rear Brake component insecure spit pin missing (1.1.21 (c)) | 1 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Clutch lever positioned so it cannot be readily operated (6.2.7 (b)) | 1 |
| Wheel alignment incorrect which adversely affects the steering steering off centre, forks slightly twisted (2.4 (a)) | 1 |
| Steering headbearing has excessive wear or free play play in headraces (2.2.2 (f) (i)) | 1 |
| Brake pedal is positioned so that the brake cannot be readily applied brake pedal position sits high, above footrest position. need to lift foot slightly to apply brake (1.1.2 (d)) | 1 |
| Front Brake fluid reservoir fluid not visible (1.1.10 (d) (iii)) | 1 |
| Rear All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Front Horn not working (7.7 (a)) | 1 |
| Rear Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Rear Suspension arm corroded and seriously weakened Swing arm assembly (5.3.3 (b) (i)) | 1 |