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.

The 40PHH #4/148 spring measures ~11.2mm. The 44PHH Spring #N115.057 measures overall length ~12.8mm.

Also fits many Mikuni Solex PHH  Carburetor applications.

Item #38 fits: S Type 40PHH, Type 3 40PHH, Type 2 50PHH 36PHH.

Item #87 fits: Type 4 40PHH 44PHH, Type3 40PHH 44PHH, Type 2 50PHH 36PHH.

Authorized Mikuni Distributor.