Pilot adjustment mixture screw, spring, washer and O-ring. One of each.

Replacement Mikuni pilot fuel air ratio mixture screw as used in many Yamaha CV carburetors, this listing includes a higher quality specially made Stainless steel spring and washer as well as a fully fuel resistant Viton O-Ring. Manufactured to the exact tolerance of OEM Screw and unrivaled surface RA finish. 
Just under 23mm tip to tip length, with a thread of M6.

This pilot assembly will fit many models of Mikuni carburetors.