single or dual batteries.....??

[cutbait]

I'm replacing marine battery single large battery. Do I upgrade to Dual purpose marine deep cycle? Or dual battery hook up ????what did a 1997 speedster twin 717 come with from the factory????

 

[Poormanracing]

I'm replacing marine battery single large battery. Do I upgrade to Dual purpose marine deep cycle? Or dual battery hook up ????what did a 1997 speedster twin 717 come with from the factory????

Twin yb16clb batteries