I was running 36:1 Amsoil dominator, clean to a hair rich LTR jetting, and RBD head mod. I have both an FMF silencer and silencer SA. The bike spooged a bit with the SA because it tends to trap the oil mist as trys to escape, where with the straight silencer it blows right through. The inside of the motor(lower end) still looked great after 4 seasons, and the seasonal top end comes out looking good as well. The head and PV were very clean, head actually still shiny with NO deposits on the squish area. You should not attempt to "jet" the bike with ratio changes. Its been proven on a dyno that richer oil/fuel ratios make the most power.
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