DF-N50 description as below:
Cylinder Arrangement　　Single Cylinder
Transmission System　　Chain Drive
Bore x Stroke (mm): 39x 41.4
engine(cc): 50cc stoke motor, air cooled
Compression Ratio: 10.5:1
Maximum Power (kw/r/min): 2.1/6500
Maximum Torque (N.m./rpm): 3.1/6000
Starter System: Electric Starter
Lubrication: Auto
Overall Size: L1200x W680x H810mm
Rider Capacity: 1 Person / Dry Weight (kg): 155
Brake (Front/Rear)　　Drum/Disk
Ignition Type: C.D.I.
Engine Oil Capacity (L): 1.0
Front Suspension: Swing Arm
Rear Suspension: Monoshock Swing Arm
Parking Brake: Mechanical Lock