My KLX250S needed a new battery and I found a vendor on ebay selling Adventure Power brand. They are a sealed battery that resembles a Yusa and cost $35 with free shipping. I got it today and it looks good. I slapped it on a charger and will install it later.
The batteries are manufactured by a company called Universal Power Group,
www.universalpowergroup.com. I was looking for an alternative to the crappy unsealed batteries Wal-Mart and auto parts stores sell that only last 6 months at a fare price. I think I found one, but only time will time if the battery holds up.
This is the vendor I bought it from on ebay.
http://stores.ebay.com/AK-Enterprises1
