Originally Posted by tvrla
I think the best bet in batteries is Digikey.com. Get the Panasonic sealed battery that's about the same size, but will slide down between the frame rails without dismantling either the aircleaner or loosening the subframe. They're only about $44 and if you get three, shipping is free. I've seen too many acid stains on mufflers so am willing to spend more to prevent that.
If you send the order form in with a check, they will ship for free. I have a 20amp Panasonic on backorder with Digikey right now.