I looked through a few pages and did not see the topic so here is goes.
I just got a 05 sportster for the wife it has 1100 miles on it and yes I stole it. Any how it has not had any service work (not that it really needs it but they say it needs it at a 1000 miles). I do all my own work and was wondering what other sportster owners are putting in their scooters? Let me know thanks
H

 

Mobil 1 15w-50 ( Wal-mart $23 5 qt. jug )for the front and Mobil 1 75w-90 for the gears . Have only done the first oil change with these as bike was bought used with 2600 miles on it. Had the H-d syn in it when bought. Bike likes it . WVleo

 

My preference would be a 20W50 Synthetic Motorcycle oil such as AMSOIL MCV or Mobil 1 V Twin, BMW, Torco T4SR to name a few.

Bear

 

I maintain my kid's '07 883 Custom- I run either M1 15W-50 or Syn3 in the crankcase, Formula+ in the tranny/primary.
Bike runs like a Swiss watch...

 

20w50 syn in the engine. Try some Redline MT90 in the trans as it is a 75w90 manual transmission oil with no moly to affect the clutch.

 

thanks guys