Thanks heaps much appreciated!That's you idle adjustment screw.
View attachment 103399
If you need a copy of owner's and repair manual here's a link.
There are many times when buying a used bike the owner's manual is not included in the sale. There's great info in the manual to safely maintain your bike. The second recommended manual to obtain is the repair manual. The repair manual is needed to complete any repair on your bike properly...www.starbikeforums.com
Noticed this was your first post. If you post in the New Members Section we can get to know you and your bike.