I can tell you on my 200x that the engine rebuild is more than the lifan motor. $250 crank repair true and welded. Bore $60, crank bearings $40, weisco piston $100, top and bottom gasket sets $40, versah conceding rod kit $60-70. Misc internal bearings $30-40. I'm sure there is some stuff I forgot to mention. That price for the lifan is reasonable. That price is with the one that comes with the wiring harness, carb, etc.? Your choice!!! There are many here to help you on your way.
Trikes owned:
83 Honda 200x "Liquid X"
81 DG 250r : Sold