Simple throttle setup that reuses parts on the carb and a few parts you can get at your local harware or grocery store. The only things you will need are A Paper Clip,Spring,Small plumbing fitting. all of those parts should cost no more than $3. You will need Pliers a Drill and bit, and screw driver. good Luck!
source
(2)
Can you help me with the springs on a carburetor like this. You see I'm putting one on a motor it wasn't designed for and I had to lose the the bracket on the bottom of the gas tank with all the throttle stuff and some springs. Could you help?