Yep, your on track with cleaning the carbs, and never trusting the PO..
1. adjust valves
2. clean carbs
3. inspect carb to head boots, replace if nec.
4. carb boots above have orings, replace....
5. synch carbs
6. beer.....
Good info here, http://members.dslextreme.com/users/bikecliff/
And...