to use the 4 pin regulator,
you will need to change your stator and flywheel over to a standard type one,
one that has a yellow wire and a white wire coming off of it from the lighting coil.
and you wont have to run a battery,
you could use a capacitor instead, which will take up a lot less room, and is only a tenth of the weight.
a decent capacitor will cost you about $12.
using a capacitor instead of a battery, you wont have lighting unless the bike is running.
if you want a link for a capacitor,
these are not too bad price wise-http://www.ebay.com/itm/BAT-PAC-BATTERY-ELIMINATOR-MOTORCYCLE-ATV-SCOOTER-/151030401828?pt=Motorcycles_Parts_Accessories&hash=item232a1d0b24&vxp=mtr
or use one like this-http://www.ebay.com.au/itm/Electrolytic-Capacitors-22000uF-30V-Radial-BY-GE-/160650775912?pt=LH_DefaultDomain_0&hash=item2567884d68&_uhb=1#ht_1178wt_1397