Just bought a 98 Argo conquest . Has the Kawasaki fd 620d . 1200 hrs . Was running good then it just died . I replaced the fuel pump ?. Pulled and cleaned carb ?. Has been plugs and sparks on both plugs . Won?t start on ether ?. I suspect timing issue . I understand some of these pre 1999 Kawasaki engines have a plastic cam gear . I suspect this is my issue ? Any thoughts ? Thanks a ton !