The 250cc engine belongs to this Bike :

and these are the specs (not to mention it has more torque the Kawasaki KLX)
Motorcycle model: LF250 (dual sports)
Dimension ((L?B?H mm):2200*860*1240
Wheel base (mm):1420
Min.Ground Clearance (mm): 220
Dry Weight:148kg
Height Of Seat (mm): 870
Fuel Tank Capacity(L): 12
Engine Type Single-cylinder, water-cooled,four-stroke
Engine model:250-2
Bore?Stroke: 72mm*61.2mm
Displacement: 249.2ml
Maximum Net Power 13.2kw/6000/min ~15.8kw/7500/min
Maximum Torque:19.4N.m/5500r/min
Clutch: Wet multi-plate
Lubrication: Pressure/splash
Start: Electric start
Ignition:.T.C.I - 3 phased
Transmission: 5 gear
Max. Speed (km/h): >100km/h
Economical Fuel Consumption (l/100km): ≤2.4L/100km
Front Type Size and Air Pressure: 3.75-17/200KPa
Rear Type Size and Air Pressure: 4.10-17/225KPa
Climbing Ability (?): ≥23?
Exhaust Index: CO≤3.8%;HC≤800ppm
Start Performance: ≤15s
Braking system (front/rear): disk/drum or disk on both
Brake Performance: ≤7m/30km/h
150 and 125 is the same zongshen engine whos specs can be traced on almost all chinese websites 150cc is roughly 13.5HP and 200 is 16HP where as 125 engine is a ditto copy of CG engine.