Boeing Co. is signaling it won't take on extra baggage in its pursuit of a bigger services division, but it will still have to pay up to build one. The planemaker announced early Tuesday that it would acquire KLX Inc. for $63 a share, or about $4.25 billion including debt. The catch is that Boeing is only buying KLX's aerospace business, which distributes parts and provides supply-chain services; it's leaving the company's small energy unit to fend for itself. That disappointed KLX investors, who had pushed the shares to around $80 amid speculation of a Boeing bid for the whole company.