By pin I assume you mean needle and yes I'm pretty sure the needle and float are supposed to be connected there should be a loop of metal on the end of the needle that hooks it to the float
Here is a rebuild kit with everything http://www.ebay.com/itm/Yamaha-YTM22...lV8elZ&vxp=mtr
1985 ATC125M: Parts
1985 ATC200S: 84 200S Bottem end, 200x Head, 200x Carb, S&S Cycle Exhaust, Wiseco 10.25:1 Piston, Reground Cam with About 1mm more lift(unknown specs).
1988 TRX250X
1983 ATC200E: Total Pile.
"Bout Tree Fiddy" Master of Thy 22RE