I bought into the Lithium IRON Kool Aid when I had left my Ducati for about a year no charging, and it started right up. The Shorai battery is OE in my Ducati. I have since put a 6 volt in my 1981 Honda C70 with electric start no problems. I have one waiting to go in my 1959 Harley FLH which has been converted to 12 volt but is a generator system, shall see how that works out. I also have one ready to go into my 2003 Harley sportster. They weigh next to nothing, are smaller than OE, can get different sizes though. I get mine and chargers for Shorai from Battery Mart. I will change to them as I replace in all my bikes. The Shorai comes with sticky foam to take up excess space in battery compartment. The only thing is they hibernate a bit in coooold weather and sometimes need to turn lights on to wake them up. Who rides in cold anyway
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