Great job on the small battery conversion Goosedog! I wonder how the YTZ7S cranking power with a 30 degree cold motor and 20W50 oil will work out?
I went with the Yuasa YTZ14S since the stock Varta is known to short out on rough riding. It is lighter and smaller than stock but has a lot more cranking power than the little brother YTZ7S which would be marginal for the 610 motor on a cold day. I used 1" extra foam to pad out the mount since the battery is quite a bit shorter in height.
After all there is no kick starter and it has CCA 230 rating and 11.2 amp hrs
size is 6" x 3.5" x 4.4" and weighs 8.6 lbs. Works great on my bike.
2007 TE610 with mods:
Carrozzeria 17" forged cush hub tubeless wheels & quick swap to stock wheels, IMS 5 Gallon with foam, Leo Vince X3 muffler, Yuasa YTZ-14S, Utah skid plate, Scotts oil filter, Fastway pegs, Unabiker rad guards, 4.5" longer Barnett Clutch cable, Baja Tecate 75W HID and Halogen, Pro Taper bars, Cycra Pro Bend, Scotts sub mount Damper and bolt on post. JD jetting, adjustable fuel screw, Flexible DOT turn signals.