That's about two more years than they usually last but not unheard of...... since you keep it on a charger all of the time that's going to make a big difference. I'm coming up on five years on the OEM Yuasa in my '09 ZX-6R and it's never been within a hundred yards of a battery tender and rarely get's ridden.... so sometimes you get lucky and some times you don't, just luck of the draw I guess. What's not fun is having the battery decide to crap out when you're two hundred miles from home.
2021 Aprilia RSV4
2020 BMW S1000RR
2016 ZX-10R KRT
2016 959 Panigale Red
2015 CBR1000RR SP Repsol
2011 ZX-10R Ebony
2009 ZX-6R Lime Green
2006 ZX-14 Red
2004 VTX 1300C Candy Red
"For we walk by faith and not by sight" II Corinthians 5:7
