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====== REF: Oiling & Lubrication ======

====== Transmission \ Primary Oil ======

===== About JASO Certifications =====
  * JASO introduced the MA and MB oil specification to distinguish between friction modified and non friction modified engine oils. Most four-stroke motorcycles with wet clutches need a JASO MA oil. ((http://www.oilspecifications.org/jaso.php))
  * The JASO MA - MB range:

^     ^JASO MA ^JASO MB ^ 
|Dynamic Friction Characteristic Index (DFI)| ≥1.45 and <2.5| ≥0.5 and <1.45 | 
|Static Friction Characteristic Index (SFI) |≥1.15 and <2.5 |≥0.5 and <1.15 
|Stop Time Index (STI) |≥1.55 and <2.5 |≥0.5 and <1.55| 

  * The JASO MA range is further divided into 2 distinct ranges - JASO MA1 and JASO MA2:

^     ^JASO MA1 ^JASO MA2 ^ 
|Dynamic Friction Characteristic Index (DFI) |≥1.45 and <1.8 |≥1.8 and <2.5 |
|Static Friction Characteristic Index (SFI) |≥1.15 and <1.7 |≥1.7 and <2.5 |
|Stop Time Index (STI) |≥1.55 and <1.9 |≥1.9 and <2.5 |


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==== Transmission / Primary Oil Capacities ====
|1957-1990 ((1959-1969 HD Sportster FSM pg 1A-3)) ((1970-1978 HD Sportster FSM pg 1-1)) ((1979-1985 HD Sportster FSM pg 2-1)) ((1986-1990 HD Sportster FSM pg 2-1)) |1.5 pints (24 oz) (710 ml)| 
|1991-1992 ((1991-1992 HD Sportster FSM pg 2-1)) |40 ounces (1183 ml)|
|1993-1996, 1998, 2004 ((1993-1994 HD Sportster FSM pg 2-1))((1995-1996 HD Sportster FSM pg 2-1)) ((1998 HD Sportster FSM pg 2-1)) ((2004 HD Sportster FSM pg 2-1))|32 oz (946 ml)|



  * Discrepancy in the 1991 FSM. It shows 1.5 pints of oil for primary / transmission.((1991 HD Sportster FSM pg 2-1)) 1991-1992 FSM corrected the 1991 book showing 40 oz for both years.((1991-1992 HD Sportster FSM pg 2-1))
  * Note that for 1994-later, the manual says "Verify that lubricant level is even with bottom of clutch diaphragm spring." Not higher or lower, but even with the diaphragm spring. It also includes this warning: "Do not overill the primary chaincase with lubricant. Overfilling may cause rough clutch engagement and incomplete disengagement (or clutch drag)."

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==== When to Check/ Change Transmission Fluid ====

^HD Transmission Oil Recommendations^Check \\ Change Only If Needed^Change^
|1959-1978 ((1959-1969 HD Sportster FSM pg 1B-6)) ((1970-1978 HD Sportster FSM pg 1-5))|Every 1,000 miles  |Every 5,000 miles or 1 year, \\ Every Spring or Fall|
|1979-1985 ((1979-1985 HD Sportster FSM pg 1-2))|    |After first 500 miles, \\ Every 5,000 miles, \\ Spring or Fall|
|1986-2003 ((1986-1990 HD Sportster FSM pg 1-2)) ((1991-1992 HD Sportster FSM pg 1-2))((1993-1994 HD Sportster FSM pg 1-2))|After first 3,000 miles, \\ Every 2,500 miles after oil changes|After first 500 miles \\ Every 5,000 miles after|
|2004 ((2004 HD Sportster FSM pg 1-7))|    | After first 1,000 miles, \\ At first 5,000, \\ Every 5,000 miles after|

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