The stock spring is beefer acording the works guys. Try setting the bike up with the stock spring. All else fails,your back to having works re-valve the shock. I havn't set mine up yet, but will be using the stock spring. I know they had a limited window for redoing the shock and I'm sure my drag ass had that window shut a long time ago. I did look at the shock and NX today on my way out of the garage on my XR today.