Have had go-karts for our kids for 30+ years, now working on Karts for grandkids (8 and counting). Currently have one that operates (Trailmaster Mini) and three in various states of operation (Yerf-Dog 3203, Manco and a no-name from long ago). Current research is for good quality replacement shocks for the Yerf-Dog 3203. Current shocks don't appear to have any actual dampening capability. All spring and lots of "bounce", but no dampening.