Has anyone had this issue before? I recently replaced my supercharger belt recently. Its a regular M112 no ported blower. Motor and SC are in great shape with no issues, spins freely in regards to bearings etc form snout. Bottom line is that the motor jerks when I tried to go over 2k rpm. I cannot WOT. When I take the belt from SC off I have no jerks or issues on passing farm road lanes. All hoses are well tacked together. Don't know if its a air leak related or spark plugs maybe? But again sparkplugs are in great shape and not knocking sounds. It just jerks or stuters when trying to WOT. Thanks again to everyone!