Oh dear, the old oil level debate.
Run engine with the bike completely upright (not on the side stand, because the oil pickup is on the RHS of the crankcase)
The scavenge half of the oil pump is now pumping all of the oil out of the sump into the oil tank (scavenge has a much greater flow rate than the inlet half of the pump so sump is allways kept empty)
The oil level will rise while the scavenge fills the oil tank.
With a torch, look inside the tank and watch the level rise - if you have the right amount of oil in the tank the level will settle just below the top of the tank.
You could now open the timing plugs on the gen cover and no oil would come out, UNLESS of course your tank was overfilled, as any excess oil is simply fed back to the engine via an overflow tube.
Also,when an XT has not been running for a while the oil in the tank can slowly seep past the non return valve (bottom of clutch casing) and fill the engine to above the timing plug levels.
David Lambeth.
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