I need some feedback on my trike's rear suspension. My wife has back injury & she hurts every time we go riding. Our trike is a 1990 Yamaha Venture Royale that was triked around 2001 w/ a Motortrike kit & a 7.5 Ford differential, solid axle. It, for SOME reason, has 2 shocks w/ springs on the outside of them (not air shocks) mounted on front of the differential & 2 air shocks mounted in rear of the differential. My wife rode on a Honda Goldwing trike w/ a friend yesterday & the ride was so smooth, she was impressed & not hurting. ( this Honda trike has THE SAME rearend as ours, but only has the 2 air shocks instead of 2 air shocks & 2 spring loaded shocks). I also have 2 friends w/ Harley Triglides that also have a solid rear axle, not IRS like the newer conversions have. Both of them ONLY have the 2 air shocks & no spring shocks. I'm looking for some ways to equal the ride w/ our Yamaha trike as the others mentioned & thought about removing the 2 front spring shocks & just using the air shocks. Anyone see a reason why I couldn't do this? I just can't understand why these other trikes have only 2 air shocks & ours has 4, (air shocks & spring shocks). I think if a Honda trike w/ the same ford rearend as our Yamaha, & the Harley trikes that have solid axles can ride that smooth, there should be a way to make mine ride smooth. BTW, all 3 trikes I've mentioned also have Motortrike conversions. I even have the PAPA JACK seats on our trike which helped but suspension rides like a covered wagon! LOL!