i am fairly new to 2 strokes and have a ? about using amsoil series 2000 2 stroke oil. it recommends a 50:1. i currently use yamalube 2r at a 36:1 and get what i think is quite a bit of smoke. have also been wet fouling quite a few plugs. seems to happen if i don't let the bike warm up for 5 minutes or so. i am running an fmf fatty as well. do believe it has stock jet and reeds. '98 cr125.