| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 92 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 61 |
| Rear reflector on motorcycle missing |1.4.1| | 55 |
| Registration plate issues | 30 |
| Throttle operating incorrectly |6.2.1f| | 24 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 23 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 23 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 22 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 22 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 21 |
| Drive chain excessively loose |6.2.1d| | 20 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 19 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 18 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 18 |
| Front wheel bearings are excessively rough |2.3.5b| | 17 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Front wheel bearings have excessive free play |2.3.5b| | 17 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 16 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 15 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 15 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 14 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 14 |
| Steering headbearing has excessive free play |2.2.2| | 14 |
| Horn not working |1.7.3a| | 13 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 12 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 11 |
| Drive chain excessively tight |6.2.1d| | 10 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Exhaust excessively deteriorated |7.1.1a| | 9 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 9 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 8 |
| Drive chain worn to excess |6.2.1e| | 8 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Front Brake excessively binding (1.2.1 (f)) | 8 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 7 |
| Rear reflector missing (4.8.2 (a) (ii)) | 7 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 6 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 6 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 6 |
| Headlamp aim beam image kick up to the offside |1.6| | 6 |
| Rear position lamp insecure |1.1.1c| | 5 |
| Riders seat insecure |6.2.1a| | 5 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 5 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 5 |
| An item not tested |Manual| | 5 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 5 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 5 |
| Offside Rear Direction indicator not working |1.5.1c| | 5 |
| Offside Front Brake disc|s| cracked |3.2.A1g| | 5 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 4 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 4 |
| Centre Exhaust excessively deteriorated |7.1.1a| | 4 |
| Centre Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 4 |
| Front Brake pipe inadequately supported |3.2.B2b| | 4 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 4 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Roller brake test indicates a binding brake |3.3.A1a| | 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 Roller brake test indicates a severely juddering brake |3.3.A1b| | 4 |
| Rear Brake hose leaking fluid |3.2.B4| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Horn not working |7.7 |a| |ii|| | 4 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 4 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 4 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 4 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Nearside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Brake hose excessively deteriorated | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Rear Brake disc|s| cracked |3.2.A1g| | 3 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 3 |
| Nearside Front Footrest insecure |6.2.1a| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Nearside Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Offside Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 3 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Rear Brake excessively binding (1.2.1 (f)) | 3 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 3 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 3 |