I eat my R6
Join Date: Dec 2014
Location: Southwest Ohio
Bike: 2008 Yamaha YZF-R6s Stock
Li-Ion Motorcycle Battery Review
The R6 wasn't designed for cold weather. The small lead-acid battery simply doesn't have the cranking amps for it.
Couple of years ago I bought a new Li-Ion Shorai brand, well known, flawless reputation, via manufacturer website. Same or better CCA rating and the battery manufacturer recommended replacement for my lead-acid model. Longer story short, I immediately had to reinstall the lead-acid. In all the reviews and forum postings, no one mentioned that Li-Ion *severely* under-performs in cold weather. It requires unrealistically long "wake up" times and even then, would bbaarreelly sustain a good enough crank to start. It too was optimized for weight and size. Given it's smaller size, I did look at a larger replacement with higher than OEM lead-acid CCA but the post arrangements were different.
That turned out to be a real waste of time and money for me. Just wish the manufacturer, reviewers and forum posters would've given me the benefit of a heads-up about cold weather performance of these Li-Ion batteries. Apparently "CCA" rating is only good, within a given technology of battery and doesn't necessarily translate well between them.
I may settle on wiring up a custom quick-connect with 14 gauge wire; using a Li-Ion jumper instead.
BOTTOM LINE: Stick to lead-acid if you ride in cold weather.