Amal 389 1 5/32" monobloc carbThe monobloc carb was introduced in 1955 to solve the problems associated with separate floats. It was widely used on Triumph, BSA, Norton, and countless other bikes until the introduction of the concentric in 1967. The 389 series is the largest of the monobloc range. Amal is producing these new carbs on new tooling and the results are outstanding. These carbs are set up with a #3 slide, 330 main jet, #25 pilot jet, and a 106 needle jet. The bore size

Needle jets become worn due to erosion

Don't take chances with 50 year old parts or inferior off brand pumps

it is a good idea to replace the crankshaft oil seal with a fresh

or Franz and Grubb Engine degree wheel

This gasket set has been made with the highest quality materials and technology currently available

Unlike most on the market today

please make sure this is correct for your application

*This product contains acetone

For PDF 650 instruction sheet click here

Whether you call them rod bearings

as the copper plating protects the threads from embrittlement during heat treatment

and we will warranty any defects