Ok i just bought a 78 cb750k.It cold here but is there any trick in starting these bike.i Put new battery and checked plugs ,cant seem to get it fire off .I try start starter fuild to .i got spark .The start will not turn over only a few rotations before kicking out ,,is that normal for these ..or do i need to just let this battery charge mofre .it been a couple hours on trickle charge ?Just trying to narrow problems .Thanks