edit: checked, don't really know what I'm looking for exactly (whether it's different on s1s) but doesn't seem to have one.. Unless it's in the tank, with the fuel pump assembly?
ahhh yeah just about to say that lol. I think it there was some funny thing near the pump on my VN..also about the reg...I think they look different but have the same internals...or maybe they mount different can't quite remember.