Last year I replaced my stock 14amp battery with shorai 18amp it did a better job starting my bike in HOT weather. But for the last few months I have been working to much to ride. I started it last month and I've had it on the charger over night. Yesterday I try to stater it but it was dead. I call Shorai their are trading me out at 50% off. I ask if there was any thing with more amp's that would fit? Yep, LFX21AG-BS12,,CCA315. So it on the way. I'll like you know how it dose.