Repair Clinic and E-Replacement Parts have parts. E Replacement Parts has exploded views of equipment. Stens has a FULL-LINE catalog for ALL kinds of 2 and 4 cycle equipment. It is a VERY good catalog! Stens has parts in bulk. Amazon has parts in bulk. Set the lo mixture for highest RPM's at idle and hi mixture for highest RPM's at full-throttle. Set the idle on a chainsaw just until the chain just stops turning. Amazon has mixture tools individually and in sets.