Where is the oil drain plug on the 88 c.i.H.D.2003

I heard that if you remove the dipstick the oil will flow better.
Hope this helps.

7/8 or 3/4 ..im pretty sure thats whats on my flh..

From the right hand side of the bike. look at the bottom of the oil tank. There is a large hose or pipe going down behind the transmission and coming out below the transmission behind the exhaust system. Follow this hose to the end and you'll find a plug in it. Remove the plug to drain the oil. Now, Harley ran the hose to a crossmember of the frame in the same area and the plug screws in from underneath the bike. I don't know what year they made this change but the drain is located at the end of the large hose under the transmission.

Good Luck
Steve

Hmm, that's a good since I haven't seen a six speed up close yet. I work with the older bikes. But, one the five speed, the drain on the Softail was a small pipe plug that uses a Torx wrench. It is located just below the right side chrome cover where the clutch cable goes in. The drain will be there or underneath the tranny but more than likely where it has been on the five speed.

Good Luck
Steve

The oil drain plug is usually closer to the left side of the bike. But, you can loosen the plug and wiggle it just a bit to allow just a few drops of oil to come out. Engine oil will be dark colored. Transmission oil will be very clear. That drain is usually more in the center of the bike.

Good Luck
Steve

The oil drain is a large diameter hose with a metal plug in it. It runs down along the backside of the frame just behind the transmission on the right hand side of the bike. There is a metal clip welded onto the frame to hold the hose. Take the hose out of the clip, remove the plug, and drain the oil tank. Refill with three quarts of oil

The transmission drain is a small 1/8" pipe plug that takes a Torx wrench to remove. It is located on the right side of the transmisson just below the chrome clutch release cover. The tranny takes 20-24 ounces of H-D trans lube or Syn3 oil. The transmission fills through the large hole in the top of the chrome clutch release cover. It takes a 7/16" hex key to remove the plug, It has a dipstick on the plug.

The oil drain plug is located on the right hand side of your bike  as if you were sitting on it, in front of the swing arm right off of the frame rail. The drain plug is a 5/8 bolt.

oil tank

its not a plug its a hose look under the tank on the pipe side, look for the hose thats goes to the bottom frame rail (tube) thats the drain hopes this helps