Hi , I have a 2004 R1150r that will start but it seems to just barely crank over. Not like my other Triumph or jap bikes that spin right up. Is this normal for the boxer engine to sound like this or should I replace the battery? I have no history from the seller to go on so I don't know how old it is. I been looking on Ebay and this is an expensive battey like a Harley battery. Not like a $40.00 new battery for the Suzuki I had. Why so much $?