Hi. My bike is a 2002 Honda Shadow 750 ace. It has no get up go.Starting with from a stop, releasing clutch and giving gas it seems to wants bog like before taking off. Then it runs good thru town, first thru 3rd maybe 4th. But I got to 50ish on interstate and it didn't have anymore, and wanted to slow down. I put new plugs in it, air filter, fuel filter, cleaned carb and jets look good. It gave me up to 60ish but still hasn't got nothing like to pass a slower vehicle safely. Please does anyone have any suggestions. I thank maybe clutches are bad but could it be more than that.