Screw right next to the starter plunger

Pulled my starter plungers tonight and polished the plungers and shined my flashlight down the plunger hole. Hole only seems to lead into the venturi and looked very clean. I did notice that the screws next to the starter plungers were all recessed (screwed in) different amounts. When the bike is cold and I choke it to start it, it isn't a real smooth idle. More like a trotting kind of sound. Don't these screws need to be in or out the same amount? I could screw them in until they seat and then back them out, but, I don't know how many turns as my Yamaha factory service manual doesn't specify. Thanks Yamaha!!


Can anyone help me on this one?

Thanks again everyone.

 

Start with them all out 2&3/4 turns, then color tune or do plug chops to get the plugs 'paper bag brown', move the screws by a few degrees at a time, as you can go right past tune.

 

Thanks Wizard. Plug chops will probably have to do, but I've been mulling over the idea of buying a colortune kit. Bought a compression tester last week and a Carb sync gauge set to sync the carbs on my other bike (xj650 maxim). I guess a colortune would be the way to go.