If all you have of it is that rolling chassis, even a japanese bike may not be worth building from there.
That VIN seems to match a few loncin enduro bikes released in the 2000's.
By looking at an international decoder it came back a 2004 Chongqing Loncin Industry Group Co Ltd .
You'll have to figure out the original displacement, then entire motors and electrical can be procured for fairly cheap, even used.
I have been mostly disappointed by the chinese frames and suspension. However, the motors are usually under powered, but bulletproof. -BIG DAN