912ULS carb service question

I haven't flown my plane with Rotax 91ULS in it in 6 weeks, totally time is 150 hours.  I run auto gas, premium and I'm in Arizona.

I had the cowl off today to do some maint. and I turned on the electric pump and fuel started to come out of both vent tubes (a continuous flow).  I took a carb off a weighed the floats 7.15g (I actually replaced these 18 months ago through CPS due to the SB)... So placing an order for floats on both sides (didn't weigh the other side yet but will).

Should I also replace the vitron needle in both carbs at the same time ? How do I check that is in good working order ?

Thanks in advance 

Julian