Primary/Tranny oil change question
 

I have a 05 1200 custom with only 550 miles on it. Just changed engine oil on it with Mobil 1 20w-50 synthetic. Did not get ownwers manual with bike but with help fromanother internet site was able to change with no trouble. My question is how do you change the primary oil and what kind of oil works best? I know where the drain plug is and read a thread saying the primary/tranny takes 1 quart. Any help or step by step would be greatly appreciated. Thanks

RE: Primary/Tranny oil change question
 

many people drain it out completely and then using exactly one quart refill through the inspection cover.

RE: Primary/Tranny oil change question
 

Where is the drain plug for the tranie on a 2004 883 Custom?

RE: Primary/Tranny oil change question
 

on the bottom left side of the motor under the primary cover there will be two bolts the one in front is a stud with a nut used to adujst your primary chain the second one back will be below the primary cover is the drain plug.the drain plug has a magnet on it to collect metal shareds that could cause a problem. I use h-d syn3 in both the motor and primary .oh yeah buy the manual its cheaper than one oil change.

RE: Primary/Tranny oil change question
 

be very careful and dont overtighten , i thought i stripped something a couple of weeks ago because i felt something give when i thought i would tighten it just one more quarter turn , turns out i just demolished the o ring

RE: Primary/Tranny oil change question
 

You can use the same Mobil 1 20-50 in the primary/tranny if you want OR better yet Mobil 1 75w-90 Syn Gear Oil. Either are way better than HD oils. Takes exactly 1 quart, fill through the chain inspection cover on left side, 2 screws.

RE: Primary/Tranny oil change question
 

If you pick up the service manual from a HD dealer or through a website you will have all the information you need to do your own services.I got mine from J&P

RE: Primary/Tranny oil change question
 

Hey Rock,
Try this thread for a PDF service manual: https://www.hdforums.com/m_1652892/tm.htm If you download it, chapter 3 has all the info you need!

RE: Primary/Tranny oil change question
 

I think highly of the Ford Motorcraft 75w90 Synthetic gear dope....my transmission quit whining when I put that stuff in.....=-)

Rev. George.....Chattanooga, Tn

RE: Primary/Tranny oil change question
 

Thanks for the help. I think I will use the 20w-50 since I have an extra quart.