modieselguy
XS650 Member
Last week I determined the jetting and other brass used in my 1974 carbs were a weird mix of random pieces. I found the needle jets were Z-4 Mikuni instead of the Z-6 it should be. Would leaving the new style, longer Z-6 impede performance? It does put the nozzle tip higher in the throat of the carb. I planned on cutting them to match the older, shorter nozzle height unless someone says leave it. Thanks in advance!