I have been leaking some water/fluid out of my radiator cap. When I take the cap the level is low, I add a mixture of water/fluid, drive it. When I get back and check again the level is low again. When I check the resevoir it is backing up in there. Ideas on correcting this please
Sounds like your cap is not sealing properly.
Recent thread with similar symptoms:
http://www.valkyrieforum.com/bbs/index.php/topic,28016.0.html