Needle Jet - 159 O-4 - VM34
159 O-4 Needle Jet Mikuni VM series carburetors (VM34). The O-4 Jet is towards the leaner end of the scale. Between lean and rich it is about 1/3 of the way down from the leanest. The 159 series jets fit VM30-VM36 spigot type carbs. Sold each.