Hello, I know there is a lot of topics on the gearing on the xr's but I cannot find a straight answer. I picked up a chain and sprocket kit for my 91 xr600r. The previous owner said it had a power up kit but I cannot confirm. I have 14/48 now and off road is sweet but on the h-way stinks. I picked up a 15/45 combo and wanted to know if this will be good. I can also use a 14/45 combo because I have a new 14t laying around. I need the best of both worlds, good highway speed and good off road ability. What works? If I do have a powerup kit, how do I know and what gearing is good for it? Thank you all fellow off road riders.