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Old 12-03-2012, 02:24 PM   #1
ywouldi OP
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Cry Hiding battery in airbox / Lithium batteries

Right, I have my bike fully stripped and am ready to get it coated etc but one thing I want to investigate is hiding the battery. I hate the location of the stock battery especially when there are no side covers.

Boxermetal's under frame unit looks good but a little pricey when postage to the UK is considered so I've been thinking about other places to put the battery.

How about the airbox? I intend to use pod filters anyway as this will be a fair weather form over function machine.

The little lithium batteries seem ideal and should fit in there nicely and then the cabling can be routed through the holes left in the airbox.

Anyone see any problems with something like this?

http://www.ebay.co.uk/itm/Lithium-Io...item337dd39347
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Old 12-03-2012, 02:29 PM   #2
chasbmw
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If you are removing the airbox, then do put the battery there, longways Is best, otherwise with the airbox removed there is a big empty space that just emphasizes the spindly nature of the BMW frame.

Unless you have a short wheelbase bike, you will have to fit some sort of sidecovers, otherwise you will have again a big empty space that needs to be filled.

iMHo etc etc
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Old 12-03-2012, 02:34 PM   #3
ywouldi OP
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Quote:
Originally Posted by chasbmw View Post
If you are removing the airbox, then do put the battery there, longways Is best, otherwise with the airbox removed there is a big empty space that just emphasizes the spindly nature of the BMW frame.

Unless you have a short wheelbase bike, you will have to fit some sort of sidecovers, otherwise you will have again a big empty space that needs to be filled.

iMHo etc etc
I intend to keep the airbox to keep that engine shape. As you say, I think it looks weird without and I'm not keen on those bikes where the battery is just bolted in place of the airbox. I reckon that one of those lithium batteries should fit, I need to make a cardboard mock-up really.
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Old 12-03-2012, 03:08 PM   #4
benthic
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if the battery fits, i don't see why there would be any problem hiding it in there if you're going pods. my concerns would be mounting it inside the airbox so it isn't loose, and then fabbing up some sort of cap for the stock airbox holes just for aesthetics...

I like this idea - I too think that the airheads look a little weird without something finishing off that airbox area.
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Old 12-03-2012, 03:35 PM   #5
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Quote:
Originally Posted by chasbmw View Post
If you are removing the airbox, then do put the battery there, longways Is best, otherwise with the airbox removed there is a big empty space that just emphasizes the spindly nature of the BMW frame.

Unless you have a short wheelbase bike, you will have to fit some sort of sidecovers, otherwise you will have again a big empty space that needs to be filled.

iMHo etc etc
I think the empty space looks elegant. In my rebuild, the battery is getting tucked up under the seat so the middle of the frame is see-through.

I would eliminate the airbox, but I've not come up with anything that doesn't look hacked together to replace the air filtration. I think I'll be keeping it in place. Pod filters just aren't suited to a bike made for actual traveling -- not the best solution for dust, rain and puddles.
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Old 12-03-2012, 03:43 PM   #6
bmweuro
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What about something like this.



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Old 12-03-2012, 03:44 PM   #7
Big Bamboo
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While in theory I like the idea, anytime someone eliminates the air box, I wonder what the loss of cooling does to the electrical components. How do the lithium batteries handle heat?
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Old 12-03-2012, 04:14 PM   #8
TomInVt
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Quote:
Originally Posted by bmweuro View Post
What about something like this.






I like it !That looks pretty cool.
Is that set-up for sale yet ?
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Old 12-03-2012, 04:52 PM   #9
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Originally Posted by TomInVt View Post
I like it !That looks pretty cool.
Is that set-up for sale yet ?
It is. 70-79 models and 80-95 models
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Old 12-03-2012, 07:59 PM   #10
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Quote:
Originally Posted by bmweuro View Post
What about something like this.












You really don't want to load on a threaded section like that.
On top of that, they appear to be cut threads.
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Old 12-03-2012, 08:19 PM   #11
Sutherngintelmen
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Quote:
Originally Posted by Big Bamboo View Post
How do the lithium batteries handle?

Here's some data
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Old 12-04-2012, 12:21 AM   #12
bmweuro
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Quote:
Originally Posted by Jon-Lars View Post
You really don't want to load on a threaded section like that.
On top of that, they appear to be cut threads.
I don't understand?
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Old 12-04-2012, 02:04 AM   #13
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Quote:
Originally Posted by bmweuro View Post
I don't understand?



I dont get it either you could use a 6x1.0 to hold that small load and it would never fail. In fact most "ah-murican" vehicles only use a 1/4-20 or 6x1.0 with a shitty wedge to hold the battery in and it whieighs in at 35-40 lbs.

Oh teh noes someone cut some threads; that will snap off like a 13 year old fat ginger in a 25 cent peek-a-booth.

seriously man it is a very light static load held by larger than necessary, yet stylish, hardware.

ETA it looks like 6X1.0 after I re calibrated my eyes, which make no difference in what I said
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digger440 screwed with this post 12-04-2012 at 02:08 AM Reason: still drinking didnt notice the size of the threads
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Old 12-04-2012, 06:29 AM   #14
Jon-Lars
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Originally Posted by bmweuro View Post
I don't understand?
Consider what happens when the bike accelerates and decelerates.

The battery's momentum is applied to the structure in the direction of that acceleration. You are side loading those threads, with the length of the shaft acting as a lever.

The cut threads are notch points that focus the force, and the base plate attachment gives the lever a fulcrum point.
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Old 12-04-2012, 06:52 AM   #15
ywouldi OP
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Quote:
Originally Posted by bmweuro View Post
What about something like this.



It's a nicely made bit of kit but I don't like the way the batter looks sitting there really. If there was a fibreglass cover or something that hid the battery it would be perfect but I just don't fancy it much!

I will be ordering the choke pulls from you at some point though!
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