Need help picking a motor

[britishninja]

Hello this is my first electric go kart and i want to make it fast but i don't know what motor to get i'm stuck between this one http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=290580540962#ht_500wt_1054 and this one http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=390170315702#ht_1121wt_1037 with a 500 amp controller right now i have a 2:1 gear ratio planed if that's not what i want what would be better and also what motor should i get any input will help thanks

 

[fresh101]

Hello this is my first electric go kart and i want to make it fast but i don't know what motor to get i'm stuck between this one http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=290580540962#ht_500wt_1054 and this one http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=390170315702#ht_1121wt_1037 with a 500 amp controller right now i have a 2:1 gear ratio planed if that's not what i want what would be better and also what motor should i get any input will help thanks

I was first looking into the D&D Motors, I personally go with the second choice and over bolt it. I seen a few youtube video with that motor. Remember that you will need lots of battery when going electric, and the weight will increase.