Here's a 60V / 63-Ah battery readily available for both of these motorcycles from Chibatterysystems, called the Titan. This option gives a longer ride, but doesn’t demand you to change the controller.
The https://poppiezlxn152892.blogaritma.com/28545919/the-fact-about-yellow-jacket-sting-hot-to-touch-that-no-one-is-suggesting