Mesin dan Performa dari Yamaha Aerox 155 yaitu:
| Varian | Yamaha Aerox 155VVA R-Version | Yamaha Aerox 155VVA S-Version | Yamaha Aerox 155VVA Standard | Yamaha Aerox 155VVA S DOXOU Version | Yamaha Aerox 155VVA R-Version Monster Energy Yamaha MOTOGP Edition | Yamaha Aerox 155 Connected Version |
| Konfigurasi Katup | SOHC | SOHC | SOHC | SOHC | SOHC | SOHC |
| Kecepatan maksimum | 145 kmph | 145 kmph | 145 kmph | 145 kmph | 145 kmph | 145 kmph |
| Rasio Kompresi | 10.5:1 | 10.5:1 | 10.5:1 | 10.5:1 | 10.5:1 | 11.6 : 1 |
| Busi per silinder | 1 | 1 | 1 | 1 | 1 | 1 |
| Launch Control | N | N | N | N | N | N |
| RPM torsi maksimum | 6250 rpm | 6250 rpm | 6250 rpm | 6250 rpm | 6250 rpm | 6500 rpm |
| Jumlah silinder | 1 | 1 | 1 | 1 | 1 | 1 |
| Sistem pelumasan | Wet Sump | Wet Sump | Wet Sump | Wet Sump | Wet Sump | Basah |
| RPM Tenaga Maksimum | 8000 rpm | 8000 rpm | 8000 rpm | 8000 rpm | 8000 rpm | 8000 rpm |
| Konsumsi Bahan Bakar | 37.6 kmpl | 37.6 kmpl | 37.6 kmpl | 37.6 kmpl | 37.6 kmpl | |
| Sistem Pendinginan | ||||||
| Sistem pembakaran | TCI | TCI | TCI | TCI | TCI | TCI |
| Katup Per Silinder | 2 | 2 | 2 | 2 | 2 | 2 |
| Torsi Maksimal | 13.8 Nm | 13.8 Nm | 13.8 Nm | 13.8 Nm | 13.8 Nm | 13.9 Nm |
| Diameter x langkah | 58 mm x 58.7 mm | 58 mm x 58.7 mm | 58 mm x 58.7 mm | 58 mm x 58.7 mm | 58 mm x 58.7 mm | 58 mm x 58.7 mm |
| Jumlah langkah | 4-Stroke | 4-Stroke | 4-Stroke | 4-Stroke | 4-Stroke | 4-Stroke |
| Jenis Kopling | Dry,Centrifugal Automatic | Dry,Centrifugal Automatic | Dry,Centrifugal Automatic | Dry,Centrifugal Automatic | Dry,Centrifugal Automatic | Kering, Centrifugal Automatic |
| Pipa Knalpot | Single Exhaust | Single Exhaust | Single Exhaust | Single Exhaust | Single Exhaust | Single Exhaust |
| Tipe filter udara | ||||||
| Kontrol Emisi | Euro 4 | Euro 4 | Euro 4 | Euro 4 | Euro 4 | Euro 4 |
