Get a range of sizes, and I'd hesitate to buy those cause they don't look like ours. Ours are round headed with a screwdriver slot.
And if you didn't know what size yours is, how do you it's not a 160 already? pop the bowl off and take it out. If you have to ride it to get the parts, take some measurements, note the numbers and put it back.
1st time getting the bowl off can be hard, use the right screwdriver JIS#2 or you'll need to grip the head with a pair of vice grips.
Here's the post on carb spec's...
http://suzukisavage.com/cgi-bin/YaBB.pl?num=1098869040/5#5 Ok here's one thing I'd like to know: In that post following that link with the carb specs, it says on some years listed that the pilot screw is preset at three turns out. Is that the same pilot screw we keep playing with to get it set up right?