There is probably a thread about this, but I need some help with shifting . ie speed and rpms. we have a 2013 triglide and sometimes it makes a knocking noise. Hubby says I am going to slow for the gear. But it sounds to me like it is racing in a lower gear. I don't have enough experience on this and I think his two wheel (fatboy) may run in a different gear or rpm for the same speed. thanks for any advice. This is our first trike and I am really loving it and want to make sure I am doing things right.