Hi, i have a problem that i wanted to check my rev so i could adjust carb . but after starting the engine, my dash shows zero rpm even tho i did everything right

edit: because my engine is cutting out, clunky.. Im looking like novice on the bike cuz its jumping and stalling in traffic

Mine does the same, it's done it for some time but not had chance to look at the loom properly, I'm sure it's a bad connection either into the display or under the tank. In the end I went with one off the motor cross hour timers so I can always see the rpm