I have an OS 7D carb from an old 1.08, and it came with 2 needle valves. One is pointy, and the other needle is more rounded. Which one is appropriate?

Whichever one adjusts to your liking. The pointy one will be much more sensitive while adjusting. They probaly supplied two, since the 1.08 used to also come with a venturi sleeve to allow low RPM use with excellent fuel draw, along with high rpm use and a large venturi.

ok i dont have the brass insert....i modified it to fit on a rossi....i since i want it for high rpm i guess its ok that i dont have the venturi insert... What neelde would you use?

edit* thanks for the answer....ill bench it this evening and see which needle works best

Either needle will work. One may be more sensitive than the other, so use the one that's less sensitive.

thankyou bill

I have this motor going in a 10-12lb mustang and im not sure if i need to use the choke/ restrictor or not?, at what rpm would you use or not use the restrictor? i have an apc 15x8 and an apc 16x6 to try regards Greg

I would use the restricter if I was propping it with a 15 or 16" prop. I would run it without the restricter if the engine is spinning at 11,000 or more with a 14" prop.