400 ex battery

[WOWA450RRRR]

my sons 400 ex has killed 2 new batterys in 3 months.they wont even think about holding a charge.is it just my luck.or has anybody had this happen. checked with fluke meter, but really not sure what to check for. really good with a/c not so good with d/c. any help......... thanks

[honduh440]

i got in a wreck once and started draining batterys like crazy. We tested everything for clean wires and checked the voltage regulator and it was fine. I was stumped but then i finally bought a new voltage regulator anyways and it fixed the problem.

[Pappy]

OCV on a fully charged unit should be between 12.62 and 12.75

hold your meter on it and have someone hit the starter button. it shouldnt fall below 10.6

also, where are you buying your batteries....how you fill and charge them relates directly to how well they will do. the new AGM batteries will not take kindly to a rapid fill/charge cycle.

[WOWA450RRRR]

purchased at local honda shop.charged on low power over a 12 hr. period.honduh440we heated the back end of that big gun pipe up and got as straight as an arrow, re packed it and my son thinks it the best ever. thanks agian for the pipe

[honduh440]

thats awsome! good to hear

[Big - D Racing]

Do you have the stupid whit brothers rev limiter cdi box? If so it will make your engine hard to start unless your battery is completely full and if it isn't then you will drain your battery completely by trying to start it over and over until it is drained.