オイル規格：ギヤオイル ISO #460
オイル量：下記表参照
| 120cc | 100cc |
| MKC302-20 | MKC20-5 |
| MKC302-30 | MKC20-6 |
| MKC302-50 | MKC20-5-1 |
| MKC303-20 | MKC20-6-1 |
| MKC303-30 | MKC21-5 |
| MKC303-50 | MKC21(5)-1 |
| MKC304-20 | MKC21-6 |
| MKC304-30 | MKC21(6)-1 |
| MKC304-50 | MKC30-5 |
| MKC30-6 | |
| MKC31-5 | |
| MKC31(5)-1 | |
| MKC31-6 | |
| MKC31(6)-1 |
※MKC-1･MKC-2は100cc