I currently own a 01 XR650R with stock sprocket and chain (14/48). I'm looking to get more low end speed for tighter trail riding. Do you guys think that I should go lower in my front sprocket (13) and leave my rear sprocket at 48, or go up in size in my rear sprocket to like 51 tooth or 52 with my stock 14 in front. What do you all recomend? Thanks for any info. PS My bike is jetted and pipped with a big gun full system exhaust and all EPA restrictions pulled from it.