shares of harleydavidson inc fell more than 10 in morning trading thursday after the motorcycle maker said it is suspending all vehicle assembly and shipments except for those within its electric motorcycle unit livewire for a twoweek period the company said it received information from a thirdparty supplier late tuesday concerning a regulatory compliance matter relating to the suppliers component part the company said it made the decision to suspend vehicle assembly and shipments on wednesday out of an abundance of caution the stock fell almost 11 in morning trading to 3195 a share the stock is now down about 15 so far this year outperforming the sp 500s 18 decline the company helmed by chief executive jochen zeitz has been on a mission to curb costs and increase profits by focusing on leaner operations scaling back its overseas expansions eliminating some bike models and lowering inventories last month the company said that a shortage of semiconductors left the motorcycle maker unable to fully meet demand in the recently ended quarter leading to a drop in profit and north american sales write to will feuer at willfeuerwsjcom