In my first attempt to change my engine oil, I drained oil from bottom of my 2001 Fatboy, from the plug on the right side towards the front of the engine, just below the Twin Cam Cover and floor board, only approx 4 oz drained out, where is this from? How to I refill that oil? P.S. I did find the right one mounted on the right side towards the rear of the engine, so oil is now changed.

put plug back this is not a drain persay..my flhtc has one 2 only drain motor oil from oil tank ..primary is on left under derby cover it takes around 38 ozs Tran takes 1 qt. highly recommend a manual...your best friend.. bar none.. put plug back this is not a drain persay..my flhtc has one 2 only drain motor oil from oil tank ..primary is on left under derby cover it takes around 38 ozs Tran takes 1 qt. highly recommend a manual...your best friend.. bar none..

No it is not the primary drain. As "ultrat" said, it is merely a plug to drain the cam chest when you are working in that area. When you restart the engine, it will refill that area on it's own. The primary drain is directly beneath the derby cover and the transmission drain is on the right side of the transmission just below the clutch release mechanism and behind the exhaust system. No it is not the primary drain. As "ultrat" said, it is merely a plug to drain the cam chest when you are working in that area. When you restart the engine, it will refill that area on it's own. The primary drain is directly beneath the derby cover and the transmission drain is on the right side of the transmission just below the clutch release mechanism and behind the exhaust system.