Non-Tdm : Batteries - Does Size Matter?

[steve27bha]

My signature shows I have two other bikes, a Honda CBX750 and a Cagiva N90 125. The CBX has not moved for a while. The Cagiva has lain in bits for far too long and is currently being screwed back together. Neither bike has a battery.

 

The batteries specified are different - as you would expect given the difference in engine sizes - but the case sizes are the same for width and height, and only differ in the larger CBX item being 90mm deep/thick vs the Cagiva's 80. I think the latter's space can take the extra of the former - bodywork will determine this when fitted. They differ in capacity at 14 vs 9 Ah for Yuasa. (Motobatt claim 16.5 vs 11!)

 

The question is:- Can I use the bigger one in the smaller bike?

 

I can't think what harm may be done other than the small generator putting out a weak charge, but that output will / should keep up with the smaller demand. Bigger should  keep it runninng a bit longer if the generator packs up! - I've heard about Italian electrics!

 

I would appreciate informed opinion / knowledge before taking the expensive route of buying two batteries.