Far too much money Alex, but in your profession you are rich. I use a YTX4L-BS about £25 and it weighs 1.3 kg and ran all last year on the 583 and I've just put one on the 620.
I ran one for 2 years no problems.
It's still on my old bike for this year as far as I know.
05-Mar-2012, 19:14 
I use a 
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