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Old 03-05-2013, 09:33 AM   #2
Paul_Rochdale
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Joined: Sep 2012
Location: Aylesford, Kent, UK
Oddometer: 150
This may or may not help you but using a small car battery is often done here in the UK. You don't say what bike you have but I once fitted a battery intended for a Reliant Robin three-wheeler to my BMW R100/7. The closeness of the top tubes of the rear subframe meant that the top edges of the battery had to be relieved by 2mm each side (using a Surform tool). Not as scary as it sounds. The bike happily like this for years but it was a tight fit.
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