Losing Oil??? Dont Know Why!!!

[vin69 TRX450r]

I am losing around 100 ml of oil after every two round or 1 1/2 hrs racing and there is no sign of a leak from the engine anywhere or from the casings, Also the bike is not smoking and does not smell like its burning oil. So wheres the oil going then boys????? Please could you give me any idea before somthing goes to wrong.

[TRX450RACER174]

100ML is about 2.5 oz or so which i would say is normal, my 06 uses a little oil and i was told thats normal. that is not very much oil at all to be losing and at that rate it would not smoke very much.

[FHKracingZ]

alot of aftermarket pistons use some oil. you wont be able to tell at all. maybe some blow back in the crank case breather that goes to the air box. if its a stock piston, ure rings are probally starting to go.

[JW450R1]

Hows the trans oil.Is it over filled.