Mikuni Performance Carburetor - Spring. Throttle Adj4usting Screw #4/148 40PHH, Item #38. Also fits Spring for 44PHH Pilot Screw, Item #87. Genuine Mikuni #4/148. Made in Japan. Sold individually. One Item #38 Spring required per carburetor. Two Item #87 Springs required per carburetor.
Mikuni Carburetor - Spring, Pilot Screw. Mikuni 40PHH Performance Carburetor. Item #87 in exploded view diagram. Genuine Mikuni #N110.209. Made in Japan. Sold Individually. Two springs required per carburetor. For use on 40PHH Pilot Screw #N110.266.