I put ProTapers on my '99 WR400F and wanted to re-install my Acerbis handguards. The bit that goes in the end of the bar appears to come in two flavors: 7/8" aluminum i.e. Renthals and 7/8" stock steel. The former is to big to go inside the ProTapers. So I ordered a "ProTaper kit". When this arrived it is for mounting the end that goes on the bars near the clamp. So I am still left with the bit that goes in the bar-end being to big for the inside diameter of the PropTaper bar. Do I need ream the bar out, or am I missing something? Thanks!