Mgm 224.18 On 6s?

Hi guys' I was hoping for some advise on whether or not I should step up to 6s with my mgm 224.18, I am running a single speed inferno gt on 5s 6000mah with a neu 1515 2.5d f and was wanting to go 6s is this a bad idea or should I get a 160.24? Also I'm wondering if motor temps will be ok (the summers up here are only 75 deg or so). I'll incude a link to my photo bucket if anyone wants to see the setup. Thanks wes http://s283.photobucket.com/albums/k...icture_275.jpg