I just received my 90TS Flat Twin AAC, LL, it has single bright valve covers on each head and a single carbureter with one intake and one set of needle valves, however, the picture on the box and on the instruction manual shows individual valve covers on each rocker arm, and a dual carbureter with seperate needle valves for each cylinder and is also said to be a 90TS. Did I get the wrong book with my engine? It came from Chief A/C.