I just put a Yosh pipe, Jetted, and K&N filter on My 06 LTZ400. It runs fine, idles good. But I keep loosing coolent. There is no visable leaks anywhere. I filled up the resovor and it seems to hold just fine while Im riding but when I shut the Quad off the resovor empties. Does anyone know what the problem is and where the hell the water is going. There is no water in the oil either. Does jetting and piping have something to do with this problem

could be making it run hotter and boiling out the overflow, make sure the radiator is very clean and fan is working.