My battery in my'04 1600 Mean Streak took a crap when I left the key on all night. So I decided to get a Yuasa replacement battery. When I pulled the old one out of the bike I saw that it was an 18aH battery and the Yuasa was a 14aH. Does 4 amp hours make a difference? Is it safe to put this battery in my bike? This is the battery that Yuasa recommended for my bike.