ordered mrd full for my drz400sm and the guy I taked to said there is no need to waist my money on a $60 jet kit. He told me to use a 160 main jet and 25 pilot. does this sound right to you? He also said to just use a 1/16 drill bit for the fuel screw plug and just find a sheet metal screw that fits tite to pull out the plug. But were do I get the replacment fuel screw?