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Old 09-08-2011, 09:06 AM   #16
Alaska n'Back
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Joined: Nov 2010
Location: Augusta, GA
Oddometer: 286

It looks like I should stop worrying about my underseat battery box getting hit by the tire. The entire battery and box are above the plane of the frame. I was trying very hard to maximize the available wheel travel. I figure with no passengers there is very little chance of maximum compression.

Looks beautiful! Mine is crude in comparison.
2011 R1200GSA 30th Anniversary
79 R100RS
Build Thread:
I welcome any and all couch surfers if you are traveling through Augusta. I even have a well stocked garage for emergent repairs.
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Old 09-08-2011, 09:17 AM   #17
Boxer Metal OP
Mad Scientist
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Joined: Nov 2003
Location: Chico, California
Oddometer: 3,568
Originally Posted by rkatapt View Post
Won't you wheel hit that battery tray since it's extended down?

My tire has hit a couple of times and my battery tray is flat.
What shocks are you running, how long are they and how much sag do you have? What rear tire are you running as well?
BMW Biker Scum
BMW Mad Scientist!
VBMWMO #7770, BMW MOA #48694 & Airhead BMW Club #600
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Old 09-08-2011, 11:50 AM   #18
Joined: Jun 2008
Location: Dallas, TX
Oddometer: 261
Originally Posted by bmweuro View Post
What shocks are you running, how long are they and how much sag do you have? What rear tire are you running as well?
Stock size rear tire.

It only hit when I ran the stock BMW shocks. Now I have Ohlins BM141's which raises it a bit and are stiffer. Your battery tray sits a good 3/4" below the frame. My battery tray sits above midframe. Here is a photo of it with the old shocks. You can see where it hit on the pan.

The dropped down portion of your tray may sit far enough back that it will not hit.
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Old 09-08-2011, 05:51 PM   #19
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Joined: Jun 2008
Location: Melbourne, Australia
Oddometer: 570
This is what I did.
The Deka battery is pretty nifty - 275CCA and considerably smaller & lighter than stock 20A battery. And because they are sealed AGM battery you can lie them down.
However, next time I do this sort of thing it will be with a lithium iron phosphate battery - quantum leap in energy density and weight.

Have to be careful with wheel clearance - the wheel can nudge a flat plate thats just sitting on to of the subframe.

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adrenal screwed with this post 09-08-2011 at 06:31 PM
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Old 09-08-2011, 06:10 PM   #20
Studly Adventurer
Joined: Jun 2007
Location: san jose
Oddometer: 709
Remove shocks----remove spring from 1 shock---reinstall springless shock---
compress suspension completely---build whatever it is and if the wheel still
turns and you have another 1/2' for safety, you/re done. It's really simple and better than guessing.
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