I would fill the tank to remove air to stop any moisture build up inside the tank, and pump the tyres up to 40psi. cover it well to stop vermin/ cats/ dogs from pissin on it as their urine will etch any bare alloy. And that should do the trick. Adjust pressures when you ride it again. Good luck. oh and put a couple of bits of carpet under the tyres to stop any black marks left from sittin still.