Battery voltage ⚡️ drop

[LittleMike]

Hello! This is very strange, if my bike is parked with the kickstand on the concrete for more than a day or two the battery goes completely dead, after I charge it and ride it around a little bit park it with a piece of wood underneath the kickstand it will never lose voltage even sitting for weeks at a time but the moment is parked on concrete I lose the battery
Thanks,
Wild Mike

 

[Snuffy]

Hello! This is very strange, if my bike is parked with the kickstand on the concrete for more than a day or two the battery goes completely dead, after I charge it and ride it around a little bit park it with a piece of wood underneath the kickstand it will never lose voltage even sitting for weeks at a time but the moment is parked on concrete I lose the battery
Thanks,
Wild Mike

This is quite strange. I would say that if your battery is draining that fast then you obviously have something staying on draining juice. When the kickstand is touching the concrete the bike is grounded. I bet if the plywood was wet you would have the same problem. Good luck

 

[HMAN]

Thats gonna take a bit a troubleshooting.

 

[LittleMike]

Thats gonna take a bit a troubleshooting.

I read about this on another form but the the thread ended up just dying out so no solution was found for him

 

[LittleMike]

I noticed this only started happening after I put a new EHC in about a year and a half ago. Since then and it started happening I just carry around a 3X3 piece of plywood with me. But it's just a very strange problem that is work aroundable but is still kind of a pain in the ass

 

[Mickmorris]

I noticed this only started happening after I put a new EHC in about a year and a half ago. Since then and it started happening I just carry around a 3X3 piece of plywood with me. But it's just a very strange problem that is work aroundable but is still kind of a pain in the ass

Sounds like a parasitic drain in the system somewhere. My Vintage Sport seemed to do that also. Couldn’t figure out exactly where it was but with a rubber pad under the kickstand I had the same results as you with your plywood. I just keep them on the lift now.

 

[LittleMike]

Same here and hook up on the battery tender also

 

[Rottweiler]

Very strange

 

[TreeGuru]

Hello! This is very strange, if my bike is parked with the kickstand on the concrete for more than a day or two the battery goes completely dead, after I charge it and ride it around a little bit park it with a piece of wood underneath the kickstand it will never lose voltage even sitting for weeks at a time but the moment is parked on concrete I lose the battery
Thanks,
Wild Mike

Have you added any new electrical accessories?

 

[LittleMike]

Have you added any new electrical accessories?

Negative, just an EHC, ignition module, speed sensor, and the speed cam module, and that was all done about a year and a half ago and since then it's done this weird drain, so yes it has to do with something that's been installed but why it would only do it on concrete is what's strange

 

[HMAN]

Which EHC and how is it mounted?

 

[LittleMike]

I got this one from Curtis and it's mounted just like the old one was using the same holes

 

[HMAN]

Have you tried removing the screws n checking for a voltage drain? Just a thought. Perhaps an internal gounding issue in the EHC? I have a RIP in the Chop n Electronix Box in the Pitbull. Both are mounted with double stick tape... think alien tape. Maybe an option?

 

[LittleMike]

I see what you're saying, try and isolate the e h c

 

[Snuffy]

Basically what’s happening is that there is voltage traveling to the ground when the bike is grounded. When it’s on the plywood or other insulator there is nowhere for the voltage to go so it just sits there. You need to find out why. Good luck

 

[Olde Man]

It takes a complete circuit to drain the battery. If the kickstand is one side the other would have to be the tires made of rubber? You can read your parasitic drain by disconnecting one of your battery terminals and reading with a meter set to milliamps between the removed terminal and the battery post. A milliamp is a 1000th of an amp.

 

[LittleMike]

Basically what’s happening is that there is voltage traveling to the ground when the bike is grounded. When it’s on the plywood or other insulator there is nowhere for the voltage to go so it just sits there. You need to find out why. Good luck

thanks partner, I am going to need luck on this one!

 

[Sven]

Have someone hold the bike upright, ohm meter to ground, posi lead to the kickstand. Then what olde man said to do. More like new raw metal at the ground cable to frame. Scrape both faces.

More like a temp gun with the bike stand on the ground and shoot the E box, stand, ground cables. wire harnesses, etc. Maybe on the wood first to stop any heat, then stand on the ground. Beats the fuck out of me WATT it is?!?!?

 

[LittleMike]

WATT did you say?
Yesterday the bike sat in a relatives garage and had no issues but a few hours in my garage and the battery started to lose juice. I will repeat this test later today on a different slab and then when I get home tonight I'll see you the bike loses any juice overnight, I can't imagine it's related to my garage floor, I have thought maybe all the rebar I had put in the garage floor maybe draining it, but it shouldn't

 

[HMAN]

Check the harness under the tank. Maybe have a rubbed wire somewhere? Check the headlamp too...melted connector starting to short out? Thinking while my fingers type.