Hello. I got a 5 hp flat head mounted on my Cushman airborne build. Just got the throttle wire and brake working the other day and took the first test drive only to discover a terrible vibration in the handlebars at mid rpm. At idle and higher revs it's fine but the mids are not fun. The briggs is in good shape with new bearings (I/C). Reason for asking here is that these engines are common on minibikes and I can't recall ever seen a minibike with rubber dampers or something like that for engine mounts. just mounted right on the frame. Or am I wrong?
//Jesper

//Jesper
