I have owned my 09 xciting 500 since brand new in 2010. This thing has never started under 45 degrees. I have been through 2 batteries so far. Yesterday i purchased the Yuasa agm high performance version of the 14 bs. It has a higher cold cranking amp than stock. Long story short my scoot has started flawlessly the last 2 40 degree mornings,this has never happened before,i am so happy,i hope this was the answer. Changed the plug to a hotter one also,the c7 instead of the c8 ngk. Just wanted to update you all. Be safe everyone!