2003 450 Battery Replacement

3 replies to this topic
  • ETP

Posted December 04, 2004 - 12:34 PM


My 03 stock battery is getting weak. Almost 2 years old now. Won't hold a charge. Its a Yuasa, # YT275 MF.
Has anyone found a better aftermarket replacement that will fit in the same compartment, or is the stock replacement the best option?

  • Hamish

Posted December 04, 2004 - 02:17 PM


I'd be checking your regulator/rectifier first, as Yuasa batteries are generally high quality and should last longer than 1 year. Check that your charge voltage is around 13.8 volts. If it goes much over 14 volts when you give it a rev your reg/rect could be overcharging the battery, which will kill it much quicker than normal.

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  • orcmike

Posted December 04, 2004 - 07:16 PM


I thought the same thing on my '03. Bought a battery tender and all is good now.

Mike Hobbs

  • ETP

Posted December 05, 2004 - 04:12 PM


Last week I needed to kick the bike to get it started (Bike had been sitting for 2 weeks), then it would E start after short stops. I turned on the DS kit, after about 4 hours of riding, and the battery did not have enough juice to sound the horn unless I had it revving real high. I assumed the battery was getting weak. The metered voltage was 12.6V at the battery later that night, however there was not enough energy to E start the bike.
Charging voltage is around 13.5-14.7V.
Took the battery out today and charged it for a while. Now seems to be OK.

Have any of you 03 owners had to replace your batteries yet?


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