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, Throttle Adjusting Screw. 44 PHH. Genuine Mikuni #N115.057. Made in Japan. Item #38 in exploded view. Sold individually. Overall length ~12.8mm. The 40 PHH Spring #4/148 measures ~11.2mm. Also fits some Mikuni / Solex...