I have a 2009 harley sportster 1200c can i change the derby cover with out removing the oil

Duplicate question already answered

Check out this site...

http://www.xr1200ownersgroup.com/site/showthread.php?612-Oil-Leaks&s=fc32507b8cb0042e37091edacb50bba2

There are quite a few different right side oil leaks discussed here.
Hope this helps...

same as any gear box, drain out old, refill with new. use recomended type and weight. i recomend AM'S oil. i put some in the 6 speed on my harley nighttrain and it shifts smoother than silk now.

I assume that by the term "transfer case", you're talking about the primary drive and transmission on your Sportster. The lubricant that you pour into the primary case also lubes the transmission. Not so on a Big Twin as they each have their own lubricants.

On the Sporty, theres a drain plug on the bottom of the primary case near the rear end of it. I'm pretty sure it uses a Torx driver to remove it. Drain the oil and refill with H-D primary & trans lube for Sportsters. Remove the derby cover at the rear of the primary cover and fill the primary until the oil level is even with the clutch pressure spring with the bike standing straight up. Replace the derby cover.

you can remove the seat,then undo the bolts on each side of the bracket holding the battery,then of course remove pos and negative wires,you can do it without removing the seat,just easier access

No ... The primary has its own fluid system. U check the level by removing the derby cover with the bike level and filling the primary with chain case fluid til it comes to the bottom edge of the diaphragm spring. U can see it with a flashlight

Glider, had this post on clutch adjustment by the book... http://www.hdtalking.com/transmission_clutch_and_primary/853-clutch_adjustment_by_the_book.html Also go to the general maintenance info on Clutches…