I have an 05 BF 650 SRA stock except for 26 inch dirt tamers. I noticed after I put the tires on it took some power out of it. Im going to order a primary spring and I have read about every thread on the site about them and cant decide which one to order. I ride trails only and everyone once and a while I haul some wood in the winter. What would you do. Dalton Orange and blue? EPI Maroon, or EPI Red? Top speed is of no concern just really want that power down low. Thanks alot.