BAJAJ 428 42T "refers to a sprocket suitable for Bajaj motorcycles, with the following specific meanings:
BAJAJ： Representing the reputation of Bajaj, it is an excellent motorcycle manufacturer in India, with products covering various types and displacements of motorcycles
428： Indicate the specifications of the chain. Among them, "42" represents the chain size, the larger the number, the wider the chain, and the stronger the torque and load capacity it can withstand; '8' indicates a chain pitch of 1/8 inch, with a pitch of 12.7 millimeters, roller diameter of 8.51 millimeters, and chain plate thickness of 1.6 millimeters
42T： Refers to the number of teeth on the sprocket, usually the number of teeth on the rear sprocket. A 42 tooth rear sprocket paired with different numbers of front sprockets can form different transmission ratios to meet the power and riding performance requirements of different vehicle models. For example, if paired with a 14 tooth front sprocket, the transmission ratio is 42 ÷ 14=3, which can provide better power performance for the vehicle during start-up, acceleration, and low-speed driving
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 |