I'm STILL behind the 'today' curve but if I don't keep moving it won't improve.
I purchased my used 2016 RE about three weeks ago at 104 miles (now 380 after yesterday's excellent day at Barona's Antique Drags with my friend's 1949 Ford Anglia). Shortly after I purchased the motorcycle, I replaced the stock lead acid battery with a Shorai LFX14L5-BS12 (
https://shoraipower.com/products?action=vehicle&type=175&make=376042&model=376045&year=376045) LiFePO4 battery. When you receive your shipment, you're going to think Dang, they forgot to pack the battery. Lithiums are that light!
I chose Shorai based on motorcycle forum reputation, informative website, motorcycle on homepage, and Royal Enfield in the vehicle selector.
I chose LiFePO4 over Optima and Odyssey because it fully charges at stock lead acid voltages while AGM requires 0.2-0.4 higher voltage for a full charge.
I didn't buy a LiFePO4-specific charger but rather am using my existing CTEK multi-use 4.3 amp charger (CTEK-56-864, no longer on CTEK website) with the cigarette plug adapter (
https://www.ctek.com/products/vehicle/connect-cig-plug) into my power outlet (a future post). However I won't use this charger for long-term trickle charge just in case of incompatibility and certainly not in it's recovery mode because the voltages are too high for the LiFePO4 chemistry.
The Shorai is slighly smaller than the stock lead acid so I used the included self-adhesive foam spacers on the battery bracket and cover as shown below. I used two thin pads on the back of the bracket and a thick pad on the bottom for spacing. I used a thin pad on the cover to reduce sideways movement. You can install them with the bracket in place; I was modifying cables which required bracket removal (see next post)
The battery has both side and top threaded terminals (ie, no loose nuts). I used the side terminals for the two primary wires and top terminals for auxiliary/accessory wires. Use washers on top terminals to prevent top bolts fouling of side terminal bolts.
Performance? Just like stock lead acid battery -- the motorcycle starts consistently after 0.25 sec cranking. Moving on to next project...