| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 56 |
| Drive chain excessively loose |6.2.1d| | 31 |
| Registration plate lamp issues | 23 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 12 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 12 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 11 |
| Drive chain worn to excess |6.2.1e| | 11 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 10 |
| Registration plate issues | 10 |
| Rear Brake excessively binding (1.2.1 (f)) | 10 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 8 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Steering headbearing has excessive free play |2.2.2| | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Nearside Front Direction indicator insecure |1.5.3b| | 5 |
| Offside Handlebar deformed |2.1.1b| | 5 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 5 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 4 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 4 |
| Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Offside Front Direction indicators not working |1.5.1c| | 4 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Offside Front Direction indicator not working |1.5.1c| | 4 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Exhaust noise is clearly in excess of that emitted by a similar motor bicycle fitted with a standard silencer in average condition |7.1.2| | 4 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 4 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 4 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 4 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Rear Brake excessively binding |1.2.1 |f|| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Rear Drive chain worn to excess |6.2.1e| | 3 |
| Handlebar deformed |2.1.1b| | 3 |
| Front Brake excessively binding |1.2.1 |f|| | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 3 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 3 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 3 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Horn not working |1.7.3a| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Steering headbearing in such a condition that steering control is adversely affected |2.2.2 |f| |ii|| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Offside Front Direction indicator insecure |1.5.3b| | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Stop lamp not working Control 1 |4.3.1 |a| |ii|| | 2 |
| Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 2 |
| Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 2 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Stop lamp not working with rear brake |4.3.1 |a| |ii|| | 2 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 2 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Front Direction indicator incorrect colour White light showing to the front of the bike |4.4.3 |a|| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Offside Front Decelerometer brake test indicates a sticking brake |3.3.E1d| | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| All direction indicators not working Flashing out of sequence and dim (4.4.1 (a) (ii)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Front Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Throttle operating incorrectly sticking when handlebars turned (6.2.7 (a) (i)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 1 |
| Rear Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.4 |a|| | 1 |
| Offside Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Exhaust excessively deteriorated Blowing at cylinder head. |7.1.1a| | 1 |
| Offside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Rear Lower Drive chain excessively loose |6.2.1d| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Wheel fixing loose |single fixing| Spindle |5.2.1 |a| |ii|| | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Stop lamp does not illuminate immediately a brake applies when foot brake lever applied a rear brake light not working. |1.3.1a| | 1 |
| Front position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Nearside Front Footrest missing |6.2.1a| | 1 |
| Offside Front Headlamp aim so that beam "kick up" is not visible on the screen DIP BEAM NO PATTERN DUE TO BULB BEING FITTED INCORRECTLY (4.1.2 (a)) | 1 |
| Central Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Steering headbearing excessively stiff or notchy Notchy (2.2.2 (f) (i)) | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Offside Front Handlebar deformed |2.1.1b| | 1 |
| Front shock absorber seal failed and leaking oil both |2.3.3| | 1 |
| Front Brake grabbing severely (1.2.1 (c)) | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Central Front Position lamp not working (4.2.1 (a)) | 1 |
| Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling wheel incorrectly adjusted |2.5.1| | 1 |
| Rear position lamp adversely affected by the operation of another lamp stop lamps comming on when position lamp illuminated |1.1.3b| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Front Wheel alignment incorrect which adversely affects the steering Forks twisted in yokes (2.4 (a)) | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Front Direction indicator insecure |1.5.3b| | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected |6.2.7 |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 |
| Brake excessively binding |1.2.1 |f|| | 1 |
| Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Offside Front Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Front Decelerometer brake test indicates a severely juddering brake |3.3.E1e| | 1 |
| Fuel system component leaking excessively or a risk of fire |6.1.3 |b| |ii|| | 1 |
| Nearside Handlebar fouling on the fuel tank or bodywork on full lock |2.1.4 |b|| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Front Brake fluid significantly below minimum mark |1.1.10 |d| |ii|| | 1 |
| Stop lamp not working Front brake |4.3.1 |a| |ii|| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Offside Rear Lower Locking devices not correctly fitted which may make the motor bicycle dangerous to ride torque arm securing bolt split pin was missing from brake plate |6.2.1h| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Motorcycle structure joining/attachment plate or fastening so insecure that structural rigidity is seriously reduced (6.1.1 (b) (ii)) | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Central Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Central Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Steering operation restricted in free movement from lock to lock |2.1.4 |c|| | 1 |
| Front Brake grabbing severely front brake grabs on severly (1.2.1 (c)) | 1 |
| Front Brake lagging in operation the effort required to apply the front brake is excessive (1.2.1 (d)) | 1 |
| Rear Brake fluid significantly below minimum mark (1.1.10 (d) (ii)) | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride split link fitted wrong way |6.2.1h| | 1 |
| Nearside Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Nearside Front Direction indicator likely to become detached |4.4.1 |c| |ii|| | 1 |
| Offside Front Direction indicator likely to become detached |4.4.1 |c| |ii|| | 1 |
| Offside Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Headlamp not working on dipped beam Main beam stuck on |4.1.1 |a| |ii|| | 1 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Headlamp light intensity severely reduced |4.1.4 |a|| | 1 |
| Headlamp light source and lamp not compatible No pattern |4.1.4 |c|| | 1 |
| Rear Stop lamp does not illuminate by the operation of both brake controls rear stop switch requires adjustment (4.3.2 (a) (iii)) | 1 |
| Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Brake lever is damaged and the brake cannot be readily applied FR0NT |3.1.3c| | 1 |
| Front Floor brake test indicates a severely grabbing brake |3.3.C2d| | 1 |
| Rear Brake disc|s| excessively worn below minimum limit |3.2.A1l| | 1 |
| Front Steering headbearing has excessive free play locking not smooth lock to lock |2.2.2| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Offside Front Handlebar deformed bent right side bar to tank clearance |2.1.1b| | 1 |
| Nearside Front Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 1 |
| Rear Riders seat insecure |6.2.1a| | 1 |
| Shock absorber has a serious fluid leak both front shockers leaking. (5.3.2 (b)) | 1 |
| Rear Brake grabbing severely (1.2.1 (c)) | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Rear Footrest missing both (6.2.12 (a)) | 1 |
| Stop lamp not working front control (4.3.1 (a) (ii)) | 1 |
| Rear position lamp does not illuminate immediately when it is switched on number plate light |1.1.3a| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Nearside Front Upper Clutch lever bent so it cannot be readily operated. |6.2.1g| | 1 |
| Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Nearside Rear Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Handlebar fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Clutch lever positioned so it cannot be readily operated clutch wont release (6.2.7 (b)) | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Headlamp light intensity severely reduced bulb incorrectly fitted (4.1.4 (a)) | 1 |
| Offside Rear Rear suspension fouling which affects the movement of the rear suspension The exhaust silencer was touching the side of the swinging arm. |2.4.A.3a| | 1 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Centre Rear Upper Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside Handlebar fouling on the fuel tank or bodywork on full lock |2.1.4 |b|| | 1 |
| Central Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake pedal attachment screws missing. |3.1.2b| | 1 |
| Offside Exhaust noise is clearly in excess of that emitted by a similar motor bicycle fitted with a standard silencer in average condition |7.1.2| | 1 |
| Brake lever so insecure that the brake cannot be readily applied (1.1.2 (e) (ii)) | 1 |
| Nearside Front Direction indicator missing (4.4.1 (a) (ii)) | 1 |
| Headlamp light source and lamp not compatible HID fitted |4.1.4 |c|| | 1 |
| Central Rear Position lamp not working replaced bulb (4.2.1 (a)) | 1 |
| Offside Rear Brake caliper inadequately mounted and braking performance affected calliper pivot bush missing (1.1.16 (c) (ii)) | 1 |
| Central Front Valve stem seriously damaged very badly split (5.2.3 (j)) | 1 |
| Central Front Shock absorber has a serious fluid leak both left and right fork seals leaking oil badly (5.3.2 (b)) | 1 |
| Front shock absorber seal failed and leaking oil BOTH |2.3.3| | 1 |
| Offside Handlebar deformed to the extent that steering is affected |2.2.1 |c| |ii|| | 1 |
| Nearside Front Horn not working (7.7 (a) (ii)) | 1 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Nearside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Nearside Front Direction indicator likely to become detached hanging by wire |4.4.1 |c| |ii|| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Rear Footrest missing (6.2.12 (a)) | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies needs adjusting |1.3.1a| | 1 |
| Headlamp aim not tested dip beam -no checkable pattern |1.6| | 1 |
| Nearside Rear Footrest insecure carrier broken |6.2.12 |a|| | 1 |
| Front Brake disc fractured |1.1.14 |a| |ii|| | 1 |
| Nearside Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Brake component inadequately mounted DISC AND PAD NOT ALIGNED (1.1.21 (c)) | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Brake disc|s| cracked |3.2.A1g| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Brake lever attachment screws loose |3.1.2b| | 1 |
| Throttle operating incorrectly on right lock (6.2.7 (a) (i)) | 1 |
| Headlamp aim not tested smell of petrol fron vehicle (4.1.2 (b)) | 1 |
| Offside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Riders seat insecure |6.2.1a| | 1 |
| Stop lamp not working foot brake (4.3.1 (a) (ii)) | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Position lamp missing (4.2.1 (a)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Front shock absorber seal failed and leaking oil N/SIDE |2.3.3| | 1 |
| Front shock absorber seal failed and leaking oil O/SIDE |2.3.3| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |