There are more discussions on ezip and izip mods on other boards. You'd need a new controller to handle 36V. Most who've modified their Currie bikes to 36V have created air holes in the motor to handle the extra heat generated. If you don't add air holes, well you may fry your motor, especially if you live where summertime temps are high. Here's a link to a couple of posts, there are many others so you might want to google.

https://endless-sphere.com/forums/vi...3249&start=105

http://www.ecoforumz.com/electric-bi...-complete.html

Good luck.