I have a 97 640 Rallye.
It was a kick start only which I have converted to Elecric start.
EGS bottom end with an 80mm 660 Rallye crank.
The original top end including the Rallye head which are different to the stock LC4 head.
99 KTM 660 Rallye
97 KTM 640 Rallye - For sale