If you buy one from the Honda dealer, it will run about $75. Here is the part # for a battery for a '98 300EX. (YTX9-BS)thats cheaper than what i paid..crap..never fails..i buy something..and later on..it always sells for a cheaper price !!!!..lol...and it came from wal-mart too !..lmao..they should come out with a thing from wal-mart.if the same item sells cheaper than what you paid for it..we will refund you the difference..lmfao.Should be the same I was just at wal-mart today and looked it up in their computer for the hell of it while I was waiting for a flat tire to be fixed. can't remember the number but it was 60-some dollars. and they had it in stock.
By the way, '93 was the first year they made the 300EX. The battery for the '93, and probably all years, is the YTX9-BS.