I was considering fitting a Lithium Iron Phosphate battery like utopia's to my Evo when the original failed and found this useful guide when I was researching the various options
https://www.rexs-speedshop.com/wp-co...Know-Facts.pdf
The mention of a regulator saver on page 3 is interesting as I hadn't heard of that before reading this article.
In the end I stuck with a regular Motobatt...