THERE IS A PLASTIC RESIVOUR UNDER THE AIR FILTER HOUSING-WHAT GOES IN IT OR IS IT AN OVERFLOW FOR A FLUID ????WHAT IS THE PROPER WAY TO FILL THE RADIATOR TO MAKE SURE BOTH SIDES ARE FULL-I NOTICED A BLEEDER SCREW ON ONE SIDE OF THE RADIATOR--WHAT IS A GOOD TIRE PRESSURE FOR TRAIL RIDING ???? THANX BRIAN