I Purchased my Bike Used with 3000 miles on it. did not have a owners manual. well i looked where oil level was in tank and on stick before changing to put it back there.. ive read anywhere from 2.8 quarts to 3.5 quarts just draining oil tank. i havent scavenged it any yet. i would like to know cause as it stands i put 2.5 quarts in it and get it warm and keep checking until im about 3/4 on the checkered part of the dip stick meaning it should be 1/4 quart low..but that amount changes everytime i service the engine.. does anyone know what is called for to go in after a oil and filter change?