Deskripsi
Mesin
| Tipe mesin | Liquid cooled, 4-Stroke, SOHC, 4 Valves, VVA |
| Jumlah/posisi silinder | Silinder tunggal |
| Diameter x Langkah | 58,0 x 58,7 mm |
| Perbandingan kompresi | 11,6 : 1 |
| Daya maksimum | 12,3 KW/10.000 rpm |
| Torsi maksimum | 14,3 Nm/ 6500 rpm |
| Sistem starter | elektrik starter |
| Sistem pelumasan | basah |
| Kapasitas oli mesin | Total = 1,50 L ; Berkala = 0,85 L ; Ganti Filter oli = 0,95 L |
| Sistem bahan bakar | Fuel Injection |
| Volume Silinder | 155 cc |
| Tipe Kopling | Wet Type Multi-plate |
| Tipe Transmisi | Manual |
| Pola Pengoperasian Transmisi | 1-N-2-3-4-5-6 |
Promo Yamaha WR 155 R
