Adjustable Jet kit - Mikuni VM24/VM26

Instructions Transfer the drain hose from your old carburetor. Thread the hose through the float housing loop so that it points upwards (picture 2). This hose serves two functions 1) indicates current fuel level 2) prepares for possible power jet connection (Figure 3). The O-ring adapter replaces the main nozzle and is tightened with your fingers (... it is held in place anyway thanks to the O-ring). If you have a VM24-512, choose the low-speed nozzle VM22/210 (image 7). Other carburetors use M28/1001 (picture 6). Set the adjustment screw to 2 turns out. This corresponds to about a 350 nozzle. With this setting the engine will probably run too rich during the first test rope. Stop and tighten the screw a little at a time and do a renewed full throttle rep. Repeat the procedure until you notice that the engine starts to sing out. To make sure you haven't screwed it in too far, open it slightly again and repeat the test. The correct setting is just where the engine stops running rich. So the same principle applies when testing fixed nozzles. The adjustable nozzle has a flow range corresponding to mikuni hex (4/042) size #0 to #350. Approximate values below: 1/4 = #60 1/2 = #110 3/4 = #140 1 = #170 1 1/4 = #210 1 1/2 = #250 1 3/4 = #300 2 = #350 Leave the transparent vibration cover on. It is still possible to use the adjustment screw anyway.