| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 24 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 15 |
| Front Brake excessively binding (1.2.1 (f)) | 15 |
| Stop lamp remains on when the brakes are released | 12 |
| Rear Position lamp not working (4.2.1 (a)) | 10 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 10 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 7 |
| Rear reflector missing (4.8.2 (a) (ii)) | 6 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 6 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 6 |
| Headlamp aim not tested (4.1.2 (b)) | 6 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 5 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 5 |
| Registration plate issues | 5 |
| Front Position lamp not working (4.2.1 (a)) | 5 |
| Rear Position lamp not working |4.2.1 |a|| | 4 |
| Registration plate lamp issues | 4 |
| All direction indicators not working (4.4.1 (a) (ii)) | 4 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 4 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 3 |
| Front Brake master cylinder leaking (1.1.10 (b) (ii)) | 3 |
| Horn not working (7.7 (a)) | 3 |
| Rear Brake grabbing severely (1.2.1 (c)) | 3 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 2 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Rear Brake pedal insecure (1.1.2 (e) (i)) | 2 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 2 |
| Offside Rear Footrest missing (6.2.12 (a)) | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 2 |
| All position lamps not working (4.2.1 (a)) | 2 |
| Offside Front Footrest missing (6.2.12 (a)) | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 2 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 2 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Rear Footrest missing (6.2.12 (a)) | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 2 |
| Rear Drive chain sprocket so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Motorcycle structure has a fracture which is likely to adversely affect braking or steering Front mudguard insecure (6.1.1 (a) (ii)) | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Rear Stop lamp not working switch |4.3.1 |a| |ii|| | 1 |
| Rear Drive chain sprocket excessively loose |6.1.7 |c| |i|| | 1 |
| Front Stop lamp not working Switch missing |4.3.1 |a| |ii|| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Steering headbearing has excessive wear or free play Very loose (2.2.2 (f) (i)) | 1 |
| Headlamp insecure Light unit loose in headlight & rotated / in incorrect position (4.1.1 (c)) | 1 |
| Front Brake cylinder leaking Leaking from fluid level inspection window (1.1.16 (b) (i)) | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Rear Brake rod insecure LOCKING DEVICE MISSING (1.1.15 (c)) | 1 |
| Rear Wheel bearing play so excessive that directional control is impaired (5.1.3 (a) (ii)) | 1 |
| Rear Brake component modification unsafe REACTION BRACKET LOCKING DEVICE (1.1.21 (d) (i)) | 1 |
| Brake component inadequately mounted FRONT DISC BOLT BROKEN (1.1.21 (c)) | 1 |
| Front Brake grabbing severely (1.2.1 (c)) | 1 |
| Front Throttle operating incorrectly engine revs up on rh lock (6.2.7 (a) (i)) | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Nearside Rear Drive chain excessively loose Drive Chain Loose (6.1.7 (c) (i)) | 1 |
| Nearside Front Upper Brake component modification unsafe Brake Hose Routed Wrongly (1.1.21 (d) (i)) | 1 |
| Offside Front Steering operation linkage fouling when handlebars turned from lock to lock Steering Fowls Due to Hydraulic Hose Fowling With Horn (2.1.4 (a)) | 1 |
| Handlebar deformed to the extent that steering is affected (2.2.1 (c) (ii)) | 1 |
| Headlamp aim not tested not working. (4.1.2 (b)) | 1 |
| Stop lamp not working from rear brake (4.3.1 (a) (ii)) | 1 |
| All position lamps not working front and rear (4.2.1 (a)) | 1 |
| Rear Brake pedal insecure locking device missing |1.1.2 |e| |i|| | 1 |
| Fuel tank leaking (6.1.3 (b) (i)) | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Offside Front Footrest insecure (6.2.12 (a)) | 1 |
| Rear Brake pedal insecure brake (1.1.2 (e) (i)) | 1 |
| Nearside Suspension arm pin or bush excessively worn swing arm bearing / bush (5.3.4 (a) (i)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Rear Wheel fixing loose |single fixing| |5.2.1 |a| |ii|| | 1 |
| Rear Brake lining|s| less than 1.0 mm thick |1.1.13 |a|| | 1 |
| Rear reflector defective or damaged by more than 50% of the reflecting surface (4.8.1 (a) (ii)) | 1 |
| Front Horn not working (7.7 (a) (ii)) | 1 |
| Brake pedal not releasing correctly and functionality of brakes affected Rear Brake Pedal Seized solid (1.1.2 (b) (ii)) | 1 |
| Drive chain worn to excess Chain can be pulled away from Sprocket (6.1.7 (c) (i)) | 1 |
| Drive chain sprocket excessively loose Cush drive worn to excess causing rear sprocket to move laterally. (6.1.7 (c) (i)) | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| 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 rod insecure (1.1.15 (c)) | 1 |
| Suspension arm pin or bush excessively worn Play in swing arm (5.3.4 (a) (i)) | 1 |
| Rear Position lamp not working When headlamp switched on (4.2.1 (a)) | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Exhaust has a major leak of exhaust gases Manifold - Head & Crack In Downpipe (6.1.2 (a)) | 1 |
| Rear Position lamp not working On Dipped Beam (4.2.1 (a)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Brake pedal is bent and the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Steering operation linkage fouling when handlebars turned from lock to lock N/S FORK STOP MISSING (2.1.4 (a)) | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Offside Rear Direction indicator likely to become detached Mounting broken (4.4.1 (c) (ii)) | 1 |
| Brake master cylinder leaking Sight glass perished (1.1.10 (b) (ii)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Front Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Stop lamp not working From front control (4.3.1 (a) (ii)) | 1 |
| Chain guard insecure (6.1.7 (i)) | 1 |
| Throttle operating incorrectly Twist grip insecure |6.2.7 |a| |i|| | 1 |
| Rear Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition silencer (8.1.1 (a)) | 1 |
| Nearside Rear Direction indicator not working indicator (4.4.1 (a) (ii)) | 1 |
| Offside Rear Footrest missing missing (6.2.12 (a)) | 1 |
| Headlamp light intensity severely reduced (4.1.4 (a)) | 1 |
| Offside Rear Brake pedal is positioned so that the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Brake pedal is positioned so that the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Rear Brake linkage has restricted free movement |1.1.15 |e|| | 1 |
| Nearside Front Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Nearside Rear Wheel spindle loose ajuster |5.2.1 |c| |i|| | 1 |
| Rear Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Rear Stop lamp not working 0n rear brake pedal (4.3.1 (a) (ii)) | 1 |
| Rear Brake clevis joint insecure brake torque arm clevis missing (1.1.15 (c)) | 1 |
| Rear Brake lever has abnormal movement of levers indicating excessive wear or maladjustment brake arm insecure (1.1.15 (f)) | 1 |
| Front Headlamp aim so that beam "kick up" is not visible on the screen lens fitted incorectley (4.1.2 (a)) | 1 |
| Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Headlamp aim not tested not tested due to faulty switch (4.1.2 (b)) | 1 |
| Headlamp insecure broken (4.1.1 (c)) | 1 |
| Rear Brake rod insecure onto drum (1.1.15 (c)) | 1 |
| Front Stop lamp not working Brake (4.3.1 (a) (ii)) | 1 |
| Rear Stop lamp not working Brake (4.3.1 (a) (ii)) | 1 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Front Headlamp aim not tested not working (4.1.2 (b)) | 1 |
| Front Brake excessively binding unable to test wheel bearing. (1.2.1 (f)) | 1 |
| Brake performance not tested due to front brake bind. (1.2.1 (g)) | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Suspension component pin or bush excessively worn swinging arm mount |5.3.4 |a| |i|| | 1 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Offside Rear Engine mounting/bracket bracket excessively loose (6.1.8 (a) (ii)) | 1 |
| Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Wheel alignment incorrect which adversely affects the steering This may be affected by chain adjustment. (2.4 (a)) | 1 |
| Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Fuel hose leaking (6.1.3 (b) (i)) | 1 |
| Front Brake fluid reservoir fluid not visible |1.1.10 |d| |iii|| | 1 |
| All direction indicators adversely affected by the operation of another lamp not working correctly with headlamp on (4.4.3 (b)) | 1 |
| Nearside Rear Footrest missing pillion peg L/H missing (6.2.12 (a)) | 1 |
| Pillion seat insecure (6.2.6 (a) (ii)) | 1 |
| Rear Stop lamp not working brake light not operating when rear brake applied (4.3.1 (a) (ii)) | 1 |
| Nearside Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear Suspension arm pin or bush excessively worn Swing arm bushes worn (5.3.4 (a) (i)) | 1 |
| Brake component insecure Rear brake drum torque arm insecure (1.1.21 (c)) | 1 |
| Front All position lamps not working (4.2.1 (a)) | 1 |
| Front Brake fluid contaminated (1.8 (a)) | 1 |
| Front Forks in such a condition that steering control is adversely affected (2.2.2 (d) (ii)) | 1 |
| Rear Brake component insecure torque arm split pin (1.1.21 (c)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Stop lamp not working With rear brake (4.3.1 (a) (ii)) | 1 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Suspension arm mounting has an unsafe modification Exhaust Mounting bolt hitting Swingarm restricting movement (5.3.3 (c) (i)) | 1 |
| Rear Brake component insecure no split pin in brake drum retaining arm (1.1.21 (c)) | 1 |