Phenolic Carburetor Insulator Spacers (1) - Choose Size Bore Size - Thickness - Application:30MM (.125") - Universal All Premier carbs come fitted

All Premier carbs come fitted with a "RJ17" pilot jet

Matchless and AJS motorcycles fom approx 1967 and on

manufacture - Lucas to replace part number 31788

H2291 & 97-2291

- Instructions included

Phenolic Carburetor Insulator Spacers (1) - Choose Size Bore Size - Thickness - Application:30MM (.125") - Universal All Premier carbs come fittedKeep your carburetor running cool by using a phenolic carburetor spacer. There are many types of spacers on the market today and I prefer to use these why? they are gas proof (will not fall apart like paper gaskets) and they are manufactured from a harder material which will not warp your carburetor. Phenolic spacers also block heat transfer better than any other spacer. Spacers will work with all Amal Monobloc and Concentric carburetors. Use the drop