| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 17 |
| Registration plate lamp issues | 14 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 8 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 8 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 5 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 5 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 4 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 4 |
| Front Position lamp not working (4.2.1 (a)) | 4 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 4 |
| Rear Brake excessively binding (1.2.1 (f)) | 4 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 4 |
| Horn not working (7.7 (a)) | 4 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 3 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 3 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 2 |
| Rear Brake excessively binding |1.2.1 |f|| | 2 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Suspension arm pin or bush excessively worn swinarm bush has excess play (5.3.4 (a) (i)) | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Nearside Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Nearside Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Central Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Position lamp not working (4.2.1 (a)) | 1 |
| Nearside Front Direction indicator incorrect colour wrong colour bulb (4.4.3 (a)) | 1 |
| Suspension arm pin or bush excessively worn Swinging arm has play in the bearings (5.3.4 (a) (i)) | 1 |
| Rear Drive chain sprocket excessively loose Mounting bolts loose (6.1.7 (c) (i)) | 1 |
| Fork yoke insecure Top yoke stem nut loose (2.2.2 (d) (i)) | 1 |
| Rear Brake master cylinder defective but brake still operating Piston partially siezed - push rod has excessive free play (1.1.10 (b) (i)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted Fitted backwards |6.1.7 |j| |i|| | 1 |
| Rear Brake pedal pivot has excessive free play Push rod to short - 0nly held in line with piston by rubber boot |1.1.1 |b|| | 1 |
| Rear Brake lever is bent and the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Rear Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Rear Brake grabbing severely (1.2.1 (c)) | 1 |
| Front Brake disc contaminated covered in fork oil. (1.1.14 (b)) | 1 |
| Handlebar deformed to the extent that steering is affected (2.2.1 (c) (ii)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Registration plate issues | 1 |
| Drive chain excessively tight |6.1.7 |k| |i|| | 1 |
| Central Rear Lower Engine mounting/bracket excessively loose |6.1.8 |a| |ii|| | 1 |
| Rear Suspension arm pin or bush excessively worn |5.3.4 |a| |i|| | 1 |
| Throttle operating incorrectly Switch gear/throttle housing loose (6.2.7 (a) (i)) | 1 |
| Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Rear Brake lagging in operation (1.2.1 (d)) | 1 |
| Rear Brake pedal has insufficient reserve travel Excessive travel (1.1.2 (a)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen LED bulb fitted (4.1.2 (a)) | 1 |
| Footrest missing nearside & offside rear (6.2.12 (a)) | 1 |
| Nearside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Rear Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Front Brake lever has abnormal movement of levers indicating excessive wear or maladjustment rear brake pedal has excessive travel (1.1.15 (f)) | 1 |
| Rear Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 1 |
| Fuel system component leaking around fuel tap fuel filter area (6.1.3 (b) (i)) | 1 |
| Front Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Front Wheel bearing play so excessive that directional control is impaired (5.1.3 (a) (ii)) | 1 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Stop lamp not working foot brake (4.3.1 (a) (ii)) | 1 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Rear Brake lever pivot has excessive free play foot brake (1.1.1 (b)) | 1 |
| Offside Footrest insecure Riders (6.2.12 (a)) | 1 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Drive chain sprocket excessively loose rear crush drive rubbers to much play (6.1.7 (c) (i)) | 1 |
| Drive chain excessively tight has tight spots (6.1.7 (k) (i)) | 1 |
| Brake lever insecure bottom mount snapped off master cylinder (1.1.2 (e) (i)) | 1 |
| Brake indicates excessive fluctuation of brake effort Front disc warped |1.2.1 |e|| | 1 |
| Brake caliper insecurely mounted and braking performance affected Front caliper bolts loose |1.1.16 |c| |ii|| | 1 |
| Brake hose damaged and likely to fail Front brake hose split by caliper |1.1.12 |a|| | 1 |
| Footrest missing Both pillion pegs missing |6.2.12 |a|| | 1 |
| Wheel bearing rough when rotated Front wheel |5.1.3 |b| |i|| | 1 |
| Motorcycle structure has a fracture which is likely to adversely affect braking or steering Front mudgaurd split and insecure |6.1.1 |a| |ii|| | 1 |
| Chain guard insecure (6.1.7 (i)) | 1 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Front Wheel fixing loose (multiple fixings) (5.2.1 (a) (i)) | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Rear Brake caliper leaking and braking performance affected (1.1.16 (b) (ii)) | 1 |
| Rear Brake cylinder leaking and braking performance affected master cylinder (1.1.16 (b) (ii)) | 1 |
| Offside Front Brake lever insecure (1.1.2 (e) (i)) | 1 |
| Suspension arm attachment bracket/mounting insecure rear swing arm pivot bolt loose |5.3.3 |a| |i|| | 1 |
| Front Stop lamp emits other than a steady red light (4.3.3 (a) (ii)) | 1 |
| Drive chain horseshoe locking device likely to become detached (6.1.7 (j) (ii)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Central Front Horn not working (7.7 (a) (ii)) | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Offside Rear Footrest missing (6.2.12 (a)) | 1 |
| Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Offside Front Lower Wheel spindle locking device missing OSF lower (inner) fork/wheel spindle pinch bolt snapped (5.2.1 (d)) | 1 |
| Central Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Central Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Offside Front Brake pedal is so short that the brake cannot be readily applied (1.1.2 (d)) | 1 |