I have a 1979 Suzuki DT-16. It is a new motor to me and I am trying to get it running right. It idles very well and will rev up nicely in neutral. When it is in gear it will rev up about half way and then bog down at higher RPM's. I have rebuilt most of the fuel sysyem trying to fix the problem. I have cleaned the card, replaced all fuel lines and fittings. I also took apart the fuel pump and cleaned up all of the screens. I thought that it was a problem with a restriction in the fuel system somewhere. Now I am pretty sure that it is something else. Any ideas? Does this sound like it is an adjustment somewhere, or something else? Any help would be greatly appreciated. Thanks!