1981 - 1983
KTM 420 MX
Steel front sprocket
| JT Sprockets
Fits to:
KTM 420 MX [1981 - 1983]
1981 - 1983 KTM 420 MX
Transmision ratio:
| 11 | 12 | 13 | 14 | 15 | 16 | ||
| 45 | 4.09 +10.1% | 3.75 +1.0% | 3.46 -6.8% | 3.21 -13.5% | 3.00 -19.2% | 2.81 -24.3% | |
| 48 | 4.36 +17.5% | 4.00 +7.7% | 3.69 -0.6% | 3.43 -7.7% | 3.20 -13.8% | 3.00 -19.2% | |
| 50 | 4.55 +22.4% | 4.17 +12.2% | 3.85 +3.6% | 3.57 -3.8% | 3.33 -10.3% | 3.12 -15.9% | |
| 52 | 4.73 +27.3% | 4.33 +16.7% | 4.00 +7.7% | 3.71 standard | 3.47 -6.7% | 3.25 -12.5% | |
Specifications
| Manufacturer | JT Sprockets |
|---|---|
| Color | Natural |
| Material | Steel |
| Position | Front |
| Units | Each |
| Sprocket material | SCM420 Chromoly Steel Alloy |
| Chain pitch | 520 |
| Number of teeth | 11 |
| Type | Countershaft |
| Material | Steel |
| Position | Front |
| Units | Each |
| Sprocket material | SCM420 Chromoly Steel Alloy |
| Chain pitch | 520 |
| Number of teeth | 12 |
| Type | Countershaft |
| Number of teeth | 13 |
| Sprocket material | SCM420 Chromoly Steel Alloy |
| Chain pitch | 520 |
| Chain pitch | 520 |
| Sprocket material | SCM420 Chromoly Steel Alloy |
| Number of teeth | 14 |
| Chain pitch | 520 |
| Number of teeth | 15 |
| Position | Front |
| Units | Each |
| Type | Countershaft |
| Sprocket material | SCM420 Chromoly Steel Alloy |
| Material | Steel |