Old thread but I thought I’d give another thumbs up for Motobatt.
I bought a MOTOBATT High Torque Battery: YB14L-A2 12V/16.5AH Battery Upgrade 190 CCA for my '93 Trident 900 in 2015 and it’s never failed to turn it over, even on the coldest day and parked outside. The previous YUASA was never really up to the job.