* Honda cuts profit forecast by 2/3, worse than feared

* Shares fall 7.9 percent in U.S. trading

* GM, Chrysler await rejigged U.S. bailout plan

* Nissan cuts further 78,000 units from Japan production

* GM opens new 150,000 unit China plant with SAIC

(Adds New York share price moves for Honda, Toyota, Nissan)

By Chang-Ran Kim, Asia autos correspondent

TOKYO (Reuters) - Japan's Honda Motor Co (7267.T: Quote, Profile, Research) issued its third profit warning this year, slashing its operating forecast by two-thirds as the global recession batters car sales and sends the yen soaring.

The deeper-than-expected revision at Japan's No.2 automaker could touch off similar moves at domestic rivals Toyota Motor Corp (7203.T: Quote, Profile, Research) and Nissan Motor Co (7201.T: Quote, Profile, Research), also reeling from the dollar's fall to 13-year lows against the yen JPY=.