Take the rotor and the clutch basket off at the same time
Remove the Seat.
remove the round derby cover from the primary. fill until the oil tries to run out. replace the cover.
how to remover oil tank 1988 sportster
locate and remove your primary oil drain plug, once the fluid is removed,remove the derby cover and replace the primary fluid to the approiate level
There is a Hose with a Clip attached to the Left Side of the Frame underneath the Primary Cover. Remove the Clip and Pull the Drain Plug in the Hose..
remove one at a time follow it to where it goes and pull it off and do the same with the other one. this is very easy no tools needed
On a 1986-2003 there is a drain hose. Look under the motor and there is a rubber hose with a worm clamp on it, it attaches to a bung on the frame. Loosen the clamp and remove the hose from the bung.
On my 06 I just removed the two nuts & bolts on each side & slid it out.
good instructions in the manual. I just removed mine to have it welded.
Next to your battery you will see a triangle shaped cover with 3 screws in it, remove that to access wiring, fuses, etc.
If memory serv's you will need to remove your rear brake master cylinder and reservoir. Then remove the access cover. You will also have to remove the rear axle to get the drive belt on. I would advise that if you are going to DIY your bike you purchase a service manual from your local Harley Dealer.
Remove the derby cover on the back end of the primary cover. Behind it you will find a spring and nut. Both slide off. Remove the nut behind that. You have to turn the screw inside it to get it out. remove the bolts from the primary cover and pull if off, AFTER you drain the oil. Once you are done, install the cover and put the first nut back on and turn the screw, just until it bottoms and then back out about 1/8 turn. Put the other nut back on and the spring. Put in your oil and install the cover.