| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 21 |
| Rear reflector missing (4.8.2 (a) (ii)) | 20 |
| Registration plate lamp issues | 18 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 16 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 11 |
| Stop lamp remains on when the brakes are released | 9 |
| Registration plate issues | 8 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 7 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 7 |
| Rear reflector missing |4.8.2 |a| |ii|| | 6 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 5 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 5 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 4 |
| Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Rear Brake excessively binding (1.2.1 (f)) | 4 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 4 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 4 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 4 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 4 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Front Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 3 |
| Headlamp aim not tested (4.1.2 (b)) | 3 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Headlamp insecure (4.1.1 (c)) | 3 |
| Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Rear Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Horn sound not in accordance with requirements (7.7 (c)) | 2 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Rear Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 2 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Front Motorcycle structure joining/attachment plate or fastening insecure mud guard sharp edges (6.1.1 (b) (i)) | 1 |
| Offside Rear Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Fuel cap ineffective |6.1.3 |b| |i|| | 1 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak FORK (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has a serious fluid leak FORK (5.3.2 (b)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Rear Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 1 |
| Fuel cap ineffective seal damaged (6.1.3 (b) (i)) | 1 |
| Rear Brake grabbing severely (1.2.1 (c)) | 1 |
| Rear Wheel spindle loose |5.2.1 |c| |i|| | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Front Position lamp not working Side light bulb missing (4.2.1 (a)) | 1 |
| Headlamp light intensity severely reduced On dip (4.1.4 (a)) | 1 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Front Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Rear reflector missing Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Stop lamp not working Brake lamp not working with front application (4.3.1 (a) (ii)) | 1 |
| Rear All direction indicators missing |4.4.1 |a| |ii|| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected stiff |6.2.7 |a| |ii|| | 1 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Position lamp adversely affected by the operation of another lamp (4.2.3 (b)) | 1 |
| Nearside Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Offside Rear Brake linkage has abnormal movement of levers indicating excessive wear or maladjustment (1.1.15 (f)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Rear Wheel spindle or securing nut(s) so insecure that wheel security or steering control is adversely affected (5.2.1 (c) (ii)) | 1 |
| Front Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Central Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Offside Handlebar grip missing |2.2.1 |d| |i|| | 1 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 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 |
| Drive chain horseshoe locking device likely to become detached Fitted incorrectly |6.1.7 |j| |ii|| | 1 |
| Rear Brake hose leaking (1.1.12 (c)) | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Stop lamp switch with a delay in operation |4.3.2 |a| |ii|| | 1 |
| Front Stop lamp emits other than a steady red light (4.3.3 (a) (ii)) | 1 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Exhaust silencer insecure (8.1.1 (b) (i)) | 1 |
| Front Headlamp incorrect colour has blue bulb on pilot side (4.1.4 (a)) | 1 |
| Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Position lamp lens seriously defective |4.2.1 |b|| | 1 |
| Forks excessively deformed Fork stanchions bent |2.2.2 |d| |i|| | 1 |
| Motorcycle structure joining/attachment plate or fastening so insecure that structural rigidity is seriously reduced Back light mount and number plate mount cracked |6.1.1 |b| |ii|| | 1 |
| Rear Position lamp likely to become detached |4.2.1 |c| |ii|| | 1 |
| Rear Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Rear Suspension component has excessive wear or free play (5.3.3 (d)) | 1 |
| Rear Shock absorber has negligible damping effect Rear shock absorber has no damping effect (5.3.2 (b)) | 1 |
| Front Position lamp not working Front position lamp not working (4.2.1 (a)) | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected Throttle being pulled on, R/H lock |6.2.7 |a| |ii|| | 1 |
| Rear Exhaust silencer insecure (8.1.1 (b) (i)) | 1 |
| Fuel cap ineffective (6.1.3 (b) (i)) | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Shock absorber has a serious fluid leak both (5.3.2 (b)) | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Front Stop lamp switch with a delay in operation lever switch (4.3.2 (a) (ii)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling adjusted as needed (2.4 (a)) | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Position lamp not working (4.2.1 (a)) | 1 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Rear Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 1 |
| Rear Lower Suspension arm pin or bush likely to become detached (5.3.4 (a) (ii)) | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Rear Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Pillion seat insecure (6.2.6 (a) (ii)) | 1 |
| Rear Wheel fixing loose (single fixing) (5.2.1 (a) (ii)) | 1 |
| Fuel system component leaking (6.1.3 (b) (i)) | 1 |
| Rear Brake performance not tested wheel loose (1.2.1 (g)) | 1 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 1 |
| Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 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 Exhaust silencer likely to become detached bracket missing (8.1.1 (b) (ii)) | 1 |
| Stop lamp not working with either brake (4.3.1 (a) (ii)) | 1 |
| Rear Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Front Dipswitch does not operate immediately when selected on main beam (4.1.3 (b)) | 1 |
| Headlamp aim not tested No Beam Pattern (4.1.2 (b)) | 1 |
| Rear Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Front Brake lever is bent and the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Brake performance not tested due to front pads missing and front leaver badly bent (1.2.1 (g)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Rear Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| All position lamps not working (4.2.1 (a)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Central Rear Stop lamp not working HANDEL BAR SWITCH CLEANED AND LUBRICATED NOW WORKING (4.3.1 (a) (ii)) | 1 |
| Rear Brake disc contaminated |1.1.14 |b|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Brake lagging in operation |1.2.1 |d|| | 1 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 1 |
| Offside Rear Footrest missing (6.2.12 (a)) | 1 |
| Nearside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Front Brake fluid not visible (1.1.10 (d) (iii)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |