X2 on reading your plugs first. I always look for a nice tan/brown on the plug. If you're black or fuel loaded you're rich... If your plug looks as new as when you put them in you're on the lean side. You can always play with jetting, clip p air fuel mixture screws ( if you're not good at dialing carbs in I wouldn't recommend fiddling to much with this), and gas mixture. If after all this you're still reading lean on the plugs you may want to do a leak down test. However if your plugs read fine then leave it be dude.