My brother and I have 2 trail 70's. 1 is a kO and the other an K1. Everything about the K1 is better. Especially the way the suspension feels. We noticed the the front forks are different. The k1's are about 2 inches longer. They make the bike taller. It really gives that bike a better feel and ride. Besides swithing them out to k1 forks, is there anything we can do to make the ko's better? As far as the rear shocks go, both bikes are identical, so I'm not too worried about them.