In XLR 125 50T/15T: XLR 125： It is a motorcycle model from Honda. Produced between 1997 and 1999, it is a 125cc off-road motorcycle. It is equipped with a single cylinder four stroke engine with air-cooled cooling, a displacement of 124cc, a high horsepower of 11.4hp/8.4kw at 8250rpm, a high torque of 1.07kgf-m/10.5nm at 7000rpm, and a 6-speed gearbox with chain drive
50T/15T： Representing the number of teeth on the motorcycle sprocket, "50T" is the number of teeth on the rear sprocket, and "15T" is the number of teeth on the front sprocket. This gear combination determines the transmission ratio of the motorcycle, which is 50 ÷ 15 ≈ 3.33. A larger transmission ratio can provide the vehicle with greater torque during starting, climbing, and acceleration, resulting in better power performance. However, high speeds on flat roads may be subject to certain limitations
Click to view the motorcycle model parameter table：
| Chain type | number of teeth | ||
| 1 | Alpha | 420 | 36 |
| 2 | Alpha | 420 | 39 |
| 3 | Alpha | 420 | 41 |
| 4 | Alpha | 420 | 43 |
| 5 | Alpha | 420 | 46 |
| 6 | pit bike | 420 | 36 |
| 7 | pit bike | 420 | 39 |
| 8 | pit bike | 420 | 41 |
| 9 | pit bike | 420 | 43 |
| 10 | pit bike | 420 | 46 |
| 11 | pit bike | 428 | 36 |
| 12 | pit bike | 428 | 39 |
| 13 | pit bike | 428 | 41 |
| 14 | pit bike | 428 | 43 |
| 15 | pit bike | 428 | 46 |
| 16 | CG/CB | 520 | 36 |
| 17 | CG/CB | 520 | 39 |
| 18 | CG/CB | 520 | 41 |
| 19 | CG/CB | 520 | 43 |
| 20 | CG/CB | 520 | 46 |
| 21 | CG/CB | 520 | 49 |
| 22 | CG/CB | 525 | 39 |
| 23 | CG/CB | 525 | 41 |
| 24 | CG/CB | 525 | 43 |
| 25 | CG/CB | 530 | 39 |
| 26 | CG/CB | 530 | 41 |
| 27 | CG/CB | 530 | 43 |
| 28 | dirt bike | 520 | 36 |
| 29 | dirt bike | 520 | 39 |
| 30 | dirt bike | 520 | 41 |
| 31 | dirt bike | 520 | 43 |
| 32 | dirt bike | 520 | 46 |
| 33 | dirt bike | 520 | 49 |
| 34 | dirt bike | 525 | 41 |
| 35 | dirt bike | 530 | 41 |
| 36 | 139fmb | 420 | 13 |
| 37 | 139fmb | 420 | 14 |
| 38 | 139fmb | 420 | 15 |
| 39 | 139fmb | 420 | 16 |
| 40 | 139fmb | 420 | 17 |
| 41 | 139fmb | 428 | 13 |
| 42 | 139fmb | 428 | 14 |
| 43 | 139fmb | 428 | 15 |
| 44 | 139fmb | 428 | 16 |
| 45 | 139fmb | 428 | 17 |
| 46 | CG/CB | 428 | 13 |
| 47 | CG/CB | 428 | 14 |
| 48 | CG/CB | 428 | 15 |
| 49 | CG/CB | 428 | 16 |
| 50 | CG/CB | 428 | 17 |
| 51 | CG/CB | 428 | 18 |
| 52 | CG/CB | 428 | 19 |
| 53 | CG/CB | 520 | 12 |
| 54 | CG/CB | 520 | 13 |
| 55 | CG/CB | 520 | 14 |
| 56 | CG/CB | 520 | 15 |
| 57 | CG/CB | 520 | 16 |
| 58 | CG/CB | 520 | 17 |
| 59 | CG/CB | 520 | 18 |
| 60 | CG/CB | 520 | 19 |
| 61 | CG/CB | 520 | 13 |
| 62 | CG/CB | 525 | 14 |
| 63 | CG/CB | 525 | 16 |
| 64 | CG/CB | 525 | 18 |
| 65 | CG/CB | 530 | 13 |
| 66 | CG/CB | 530 | 14 |
| 67 | CG/CB | 530 | 16 |
| 68 | CG/CB | 530 | 18 |