Mesin dan Performa dari Kawasaki KLX 150 yaitu:
| Varian | Kawasaki KLX 150 BF | Kawasaki KLX 150 BF SE | Kawasaki KLX 150 BF SE Extreme | Kawasaki KLX 150 L | Kawasaki KLX 150 Standard |
| Konfigurasi Katup | SOHC | SOHC | SOHC | SOHC | SOHC |
| Kecepatan maksimum | 115 kmph | 115 kmph | 115 kmph | 115 kmph | 115 kmph |
| Rasio Kompresi | 9.5:1 | 9.5:1 | 9.5:1 | 9.5:1 | 9.5:1 |
| Busi per silinder | 1 | 1 | 1 | 1 | 1 |
| Launch Control | N | N | N | N | N |
| RPM torsi maksimum | 6500 rpm | 6500 rpm | 6500 rpm | 6500 rpm | 6500 rpm |
| Jumlah silinder | 1 | 1 | 1 | 1 | 1 |
| Sistem pelumasan | Oil Lubrication | Oil Lubrication | Oil Lubrication | Oil Lubrication | Oil Lubrication |
| RPM Tenaga Maksimum | 8000 rpm | 8000 rpm | 8000 rpm | 8000 rpm | 8000 rpm |
| Konsumsi Bahan Bakar | 31.8 kmpl | 31.8 kmpl | 31.8 kmpl | 31.8 kmpl | 31.8 kmpl |
| Sistem Pendinginan | |||||
| Sistem pembakaran | DC-CDI | DC-CDI | DC-CDI | DC-CDI | DC-CDI |
| Katup Per Silinder | 2 | 2 | 2 | 2 | 2 |
| Torsi Maksimal | 11.3 Nm | 11.3 Nm | 11.3 Nm | 11.3 Nm | 11.3 Nm |
| Diameter x langkah | 58 mm x 54.4 mm | 58 mm x 54.4 mm | 58 mm x 54.4 mm | 58 mm x 54.4 mm | 58 mm x 54.4 mm |
| Jumlah langkah | 4-Stroke | 4-Stroke | 4-Stroke | 4-Stroke | 4-Stroke |
| Jenis Kopling | Wet, Multi-Plate | Wet, Multi-Plate | Wet, Multi-Plate | Wet, Multi-Plate | Wet, Multi-Plate |
| Pipa Knalpot | Single Exhaust | Single Exhaust | Single Exhaust | Single Exhaust | Single Exhaust |
| Tipe filter udara | |||||
| Kontrol Emisi | Euro 3 | Euro 3 | Euro 3 | Euro 3 | Euro 3 |
