No. Fuel is drawn through the carb and the centre of the crankshaft into the crankcase. If you want to lubricate the front bearing you must allow some fuel/air mixture out through the front bearing. No flow, no oil. Many engines actually have a small channel cut in the forward part of the crankcase to allow some fuel to the rear of the front race. Most front bearings are of the shielded type, not sealed. You should get some fuel through the bearing, though not a lot as that would indicate that the crankshaft/case fit is getting a bit loose, and the crankase sealing depends on this fit.
Evan, WB #12.