BMW K1200, K1300, and K1600 Forum banner

1 - 18 of 18 Posts

·
Registered
Joined
·
153 Posts
Discussion Starter #1
I am a very recent (a couple of days ago) BMW K1200GT owner (2008). Although a long time owner of a variety of different bikes, this is my first "canbus" bike.

I am actually having a bit of information overload here. I have found so much information on this subject that refer to a number of different year/model BMW bikes, that I'm not sure what specifically applies to me. And some of the information seems a little out of date and contradictory as well.

After many years of various technology, sizes, etc. of batteries, and various chargers, I am pretty much sold on Deltran Battery Tenders. I would prefer to use this proven technology to keep the battery topped up on my new BMW. Not to mention it's cheaper than the "over the top" BMW one!

I also would like simple connectivity for some temporary electronic devices like a GPS.

What I thought would be ideal is to have a second powerlet connector next to the factory one (I'm not even sure where the factory one is yet!) and have them marked "canbus" and "direct". I believe harnesses are sold for this purpose. I have also heard that you can "convert" your factory canbus powerlet connector to a "direct" connection. That might be an alternative to a second one, but my gut tells me to leave the factory one alone.

The plan would then be to get two powerlet "pigtails". One with the battery tender connector (leave on the battery tender) and one with a "cigarette lighter" socket (for other accessories). I have seen both of these for sale as well.

Thoughts? Recommendations? Convert the existing factory one to direct? Add a second one? Something else completely? Good online sources for the required hardware?

I want to jump on this pretty quick so I can keep my BMW on a Battery tender (Jr.) while in the garage (like all my other bikes).

Thanks in advance for your advice.
 

·
Strafist
Joined
·
2,544 Posts
If you want to keep your charger I suggest getting an Odyssey PC680 battery. You'll find the stock battery, besides needing a special charger to desulfate and keep it up to snuff, will be pitifully lacking. In hot weather my bike would slowly crank before catching. With an Odyssey it spins like crazy.

The powerlet connector is basically what you feel like doing. I have the original hooked to canbus and it's worthless, it shuts off at around 5 amps draw and to use it with the BMW special charger you have to go thru a routine. I kept my stock one simply because I had an extra available when I brought the bike home and stripped it down to farkle it and add the fuse block.

I know it's a waste to buy a new battery for a new bike, but in the long run you'll be happier and you get to keep your old charger and not buy a new charger. At around 100 bones for the special charger, you've already saved money buying an Odyssey for around 68 smackers.
 

·
IBR# 366
Joined
·
3,151 Posts
Many folks have added a second powerlet outlet for just the reasons you mentioned.

Another thought is to add a cigarette lighter plug directly to the battery. That keeps it up front where you would need it for a gps, phone charger, mp3 player, etc.

Or you could go whole-hog and get a powered tank bag. :)

But I prefer my tried-and-true charging method: Just ride the damn thing and let the alternator do the work. :ricky
 

·
Registered
Joined
·
749 Posts

Attachments

·
Registered
Joined
·
606 Posts
Add the second accessory outlet directly to the battery and use that to charge through.
as was said.
 

·
Registered
Joined
·
377 Posts
kbmwrs said:
Add the second accessory outlet directly to the battery and use that to charge through.
as was said.
This is exactly what I've done to my last two CANBUS BMWs. It looks factory. You can plug a non CANBUS charger into it, plug a Gerbing vest into, plug a tire pump into...and on and on.

Order the KRS accessory socket. Part # 71602337054 $56.00
 

·
Registered
Joined
·
84 Posts
ok, it was late and I somehow didn't get the fact that you guys were talking about charging the battery in the bike (since mine is currently on a workbench in the basement).
 

·
Registered
Joined
·
153 Posts
Discussion Starter #11
Ordered my kit to replace the punch-out block on my new GT. Thanks for the help, I'll let you know how it goes... :teeth
 

·
Registered
Joined
·
377 Posts
Smilodon said:
Ordered my kit to replace the punch-out block on my new GT. Thanks for the help, I'll let you know how it goes... :teeth

Photo of my installation. The ground and hot run back to a Blue Sea fuze bock that runs directly to the battery.



 

·
Registered
Joined
·
153 Posts
Discussion Starter #14
Ok, now I'm stumped

I just got my powerlet goodies in the mail. But, in the meantime I went ahead and took the battery cover off and hooked up a Deltran Battery Tender directly to the battery (with the alligator clips).

Odd behavior. I have about a half dozen or so of these things (multiple bikes, lawnmowers, etc.). First the "Jr." went on, and the light stayed red (overnight). This means it is charging. However, the transformer was cold to the touch (it is usually mildly warm when actually charging).

So, my thought was that the battery might be a little low for the "Jr." to do the full charge (they are just intended to be maintainers, not chargers). So, I got out my latest and greatest "Plus" model and threw it on.

Again, overnight and the "Plus" showed a red and blinking green light. This means the battery is over 80% charged, but not fully charged (fully charged is a solid green light).

I've got a few bikes, and have used these chargers on all sorts of batteries over the years (my track bike has a smaller version of the exact same battery as the BMW). I have never seen this behavior, even on damaged batteries.

The battery is a brand new OEM battery (2 weeks ago), installed by the dealer since the bike had sat on the showroom floor for a while (yay Hap's BMW!). It starts the bike and works fine otherwise.

Any thoughts/similar experiences?

I'm planning on installing the powerlet, and one of the main reasons was easy attachment to a battery charger.
 

·
IBR# 366
Joined
·
3,151 Posts
I've heard several folks say that it takes a full day or two for their Battery Tenders to give the green "charged" light on the GT. So I don't think what you're seeing is all that unusual.
 

·
Registered
Joined
·
749 Posts
My BMW battery charger stays on for 8-10 hours until I get the steady green light on my GT, but only with the BMW Gel Battery. With a lead acid or AGM Battery I get a steady green light in about 1 hour.
 

·
Registered
Joined
·
153 Posts
Discussion Starter #17
Well, I guess it really is a smart charger then... Well, smarter than me anyhow...

We'll see how it goes... :dunno:
 

·
Registered
Joined
·
1,511 Posts
Just load tested my batt...oem with 4 years of service avg of 4-5 cranks a day 7days a week through the season and its still cranking just fine at sub zero with no tender...all I do is start it up every week and let it fully warm up till the fans come on...did have a lose gnd at the batt.... thinking my batt is toast... but it was just a loose gnd.......but other than that I cant complain....But with Irish luck it will crap out when I need it most..You can get a solar tender for about 45 bucks...Thinking of that
 
1 - 18 of 18 Posts
Top