how much oile should i put in the gpx with a TB 146 with trail bikes oil cooler? I think i hear the valves tapping when i first start it up any suggestions.
I run Less than a Quart of oil... because these motor create a lot of pressure and will actually push out the oil through the crank case Vent and head breather.
I run it just touching the dipstick when "hot" with an Oil cooler
I have an X2R with the 146 SGR kit and with a whole quart in it it did exactly that pushed it out the crank case breather. So i run it just touching the dip stick too.