796 starting issues after shorai battery instal

[gitter]

Installed a shorai battery and since the install the bike looks like it resets its self whenever I try to start it. Does it about one or two times and then will finally start. I turn the key to the on position and everything is fine, but once I try and start the bike thats when it resets and then will finally start the second or third time. Open to ideas

Thanks

Gitter

[DarkMonster620]

try turning on the ign key and then not doing anything or use put your helmet on . .  and then try to start the bike, why I say this, it happened to me too . . . now,  I hit the ign put my helmet on pull fast idle lever, hit start then finish with with the helmet

my 0.02

[He Man]

which shorai? and how cold is it? this is the main reason why i went back to AGM.

[gitter]

Can't remember the part number but its the stock replacement for the 796. Temps have been between 32 and  60. Terminals are tight and bike registers 12.7 with the key in the on position and the motor off.

[Howie]

Can't remember the part number but its the stock replacement for the 796. Temps have been between 32 and  60. Terminals are tight and bike registers 12.7 with the key in the on position and the motor off.

12.7 is not good for a Shorai   http://www.shoraipower.com/s.nl/it.I/id.5/.f   scroll down to chart.

[gitter]

I checked it this morning and it was down to 12.5 ( granted this was checked by using the display on the bike not actually using a volt meter) Is there anything on the 796 that would be draining the battery while the bike is off? Also, what are my options as far as a remedy for this as I'd like to keep using the lighter battery.

[DarkMonster620]

all I can say, weird . . . do to me working at home, I don't get to ride much and my shorai hasn't shown me never less than 13.5V and that was when I left for 3 weeks in a row and forgot to disconnect it . . .
call them and check your invoice for wty period . . . and have your bike checked . ..  it would seem that is using too much parasitic voltage

[battlecry]

"Is there anything on the 796 that would be draining the battery while the bike is off?"

Your bike probably has an immobilizer and a clock.  Small drain, but it adds up.  Your battery could be toast at 12.5v.  Contact Shorai.

[gitter]

So, should I look at getting a larger capacity battery? Or is this one fine and I just got a defective one?

[battlecry]

Hard to say, Gitter.  Two guys at Advrider are pretty hard on Shorai's capacity rating.  They believe Shorai overrates them and, for their bikes, and in cold weather, they recommend going to a bigger size.  The lithium batteries are better though of as 13V batteries, not 12.  I think they are empty and probably dying when they get to 12V.

[gitter]

Just talked to shorai. They told me to throw it on a charger for about two hours and see if that fixes my issue. Reason being is that it might be an older battery that had been sitting with Motomummy for a while.

As far as a history of the battery. I got it on Wednesday. Installed it. Went for a short half hour ride Thursday and other than that it's been sitting aside from the time I tried to start it yesterday.

[gitter]

Let it charge for an hour. Light on the Battery Tender was a solid green (fully charged)

Took it off the charger, turned the key to the on position, bike read 12.5 then jumped up to 13.0. Turned the key off and back on, read 12.5 again. Pushed the starter, bike started and it jumped up to 13.9.

Thoughts?

[battlecry]

Maybe you should buy the Shorai charger?

Here's where I'm going with this.  The green light on the battery tender means it has stopped charging and has switched into "float" or maintenance mode.  I have a Yuasa and at 60F in the garage the float mode is 13.2V, good for the FLA battery in the Vespa.  I have a Battery Doc with a float mode of 13.5V, good for the AGM battery in the Monster.  The float on my Battery Tender Plus is 13.4V, so it is good for an old battery I retired from service, now spare battery I don't want to see die (but probably will). 

Fully charged Lithiums float at 14.3V or so.   

This means that your tender is not letting the battery reach its potential.  The Shorai charger also does some load balancing between cells using a special cable.  It may be a pain to connect it under the tank, so you may want to look into a pigtail for it. 

[DarkMonster620]

like this,


Connection to battery by DarkMonster620, on Flickr

the clips are from my Centurion S diagnostic tool . . .

[battlecry]

That's the one.  Definitely not an SAE cable.  Do you know the float voltage with the Shorai charger Darkmonster620?