Differences

This shows you the differences between two versions of the page.

Link to this comparison view

-Both sides previous revisionPrevious revision
-techtalk:evo:engmech01c [2022/02/08 21:36]
– [Interchangeability] hippysmack
+
+techtalk:evo:engmech01c [2024/01/03 06:37] (current)
– hippysmack
@@ Line -12,5 +12,5 @@ removed created
     * 1991-2003 engines will bolt to 1986-1990 frames with the consideration of the kickstand mount on the left bottom tube.  \\ The casing is larger at the front due to the rotor and stator being moved to the crank in 1991. \\ Otherwise, the motor mounts should all bolt up just fine.
       * 1986-1988 frames have the jiffy stand mount welded close to the front motor mounts. \\ The kick stand mount needs to be moved as it interferes with the primary cover on 5 speed cases.
       * 1989-1990 frames have the jiffy stand mount welded a little further back, just past the center of the oil pump. \\ You should be able to get the motor in without moving the kickstand mount. ((fcarlos085 of the XLFORUM httphttps://www.xlforum.net/forumsforum/showthread.phpsportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/frame-mount-evo-sportster-talk-1986-2003-models/75511-4-to-5-speed-engine-swap-questions/page2?t=533976&page=2))
       * 1991-2003 frames have the jiffy stand mount welded behind the center of the motor mount.
     * 1986-2003 motors will also bolt into 1982-1985 frames. \\ The left bottom tube has the divot to shift the motor as is in 1986-2003 frames. \\ You'll still have to deal with moving the kick stand on those however.
@@ Line -114,5 +114,4 @@ removed created
 
 ===== Motor Vin Pad / Location =====
 
 Starting in 1970, the bike is titled to the frame only and the same number set is stamped on the motor. \\
 Starting in 1981, the motor VIN is only an abbreviation of the frame VIN. \\
@@ Line -123,5 +122,4 @@ removed created
   * **1991 to March 1993**: The VIN pad is the case itself not raised, left side in the second rib down from the top with VIN hand stamped there. \\ An off center portion of the second rib was deleted and the Vin was hand stamped into that area. \\ The timing hole plug was moved to the right side of the motor.
   * **April 1993-2003**: The VIN is "pin stamped" by machine on the left side of the motor in the same location as 91-E93 and slightly off center. \\ (more toward the front cylinder and with no raised pad) \\ HD issued TSB M-1304/1304A explaining the change was to increase manufacturing efficiency. \\ The pin stamped numbers do not photograph well from afar. \\ In fact, one has to actually focus on the numbers to get a good picture of them.
 
 
 ===== Various Numbers Found on Cases =====
@@ Line -257,4 +255,5 @@ removed created
 |  2000-2003 Sportster Crankcase Number Locations ((photos courtesy of Ebay seller, gnarlydavidson1. [[https://www.ebay.com/sch/gnarlydavidson1/m.html?item=164269655258&rt=nc&nma=true&nordt=true&orig_cvip=true&si=HqcoQgHNj7TAtnE2%252BX5d6I6LD7A%253D&hash=item263f3c04da%3Ag%3AIDEAAOSw4CRe-35v&vxp=mtr&_trksid=p2047675.l2562|Link to Items for Sale page]]  ))  ||
 |{{:techtalk:evo:engmech:2000-2003_sportster_left_crankcase_number_by_gnarlydavidson1.jpg?direct&300|}}|{{:techtalk:evo:engmech:2000-2003_sportster_right_crankcase_number_by_gnarlydavidson1.jpg?direct&300|}}|
 
 ==== Case Match Numbers (1975-Up) ====
 In addition to belly numbers, there is a second set of numbers on 75> motors on each case half that should match. \\
@@ Line -270,4 +269,5 @@ removed created
 |  1986-1990 Case Match Number Locations ((photo courtesy of c3cycle.com, Link to site: https://www.c3cycle.com/))  |
 |{{:techtalk:evo:engmech:1986-1990_sportster_case_match_number_locations_-_87_xlh1100_by_c3-cycle-tech.jpg?direct&300|}}|
 
 ==== Serial or VIN Numbers ====
 These numbers pertain to the whole bike, not just the engine. Coding for these numbers changed over the years. \\
@@ Line -359,4 +359,5 @@ removed created
 |  1986-1990 Oil Pump Mounting Boss ((photo courtesy of Robert Evans))  |  1991-2003 Oil Pump Mounting Boss ((photo courtesy of c3cycle.com, Link to site: https://www.c3cycle.com/))  |
 |{{techtalk:evo:engmech:1986-1990_sportster_oil_pump_mounting_boss_by_robert_evans.jpg?direct&300|}}|{{:techtalk:evo:engmech:1991-2003_sportster_oil_pump_mounting_boss_by_c3-cycle-tech.jpg?direct&300|}}|
 
 ==== Right Case Oil Scavenge / Engine Breathing ====
 1977-up motors scavenge oil from the crankcase thru an external vertical boss added to the outside of the rear sump area. \\ The boss is rifle drilled from the bottom to connect to the upper horizontal oil passage to the oil pump. \\ A hole is drilled from the inside of the right case to connect sump oil to the return passage. \\ The bottom of the rifled hole in the vertical boss is plugged. \\   
@@ Line -389,6 +390,7 @@ removed created
 |  1998-1999 Inner Right Case ((photo courtesy of Ebay seller, Cycle Parts 4U, [[https://www.ebay.com/str/cycleparts4u?_trksid=p2047675.l2563|Link to Ebay Store]] ))  |  2000-2003 Inner Right Case ((photo courtesy of Ebay seller, gnarlydavidson1. [[https://www.ebay.com/sch/gnarlydavidson1/m.html?item=164269655258&rt=nc&nma=true&nordt=true&orig_cvip=true&si=HqcoQgHNj7TAtnE2%252BX5d6I6LD7A%253D&hash=item263f3c04da%3Ag%3AIDEAAOSw4CRe-35v&vxp=mtr&_trksid=p2047675.l2562|Link to Items for Sale page]]  ))  |
 |{{:techtalk:evo:engmech:1998-1999_sportster_right_case_oil_scavenging_by_88twincam99.jpg?direct&300|}}|{{:techtalk:evo:engmech:2000-2003_sportster_right_case_oil_scavenging_by_gnarlydavidson1.jpg?direct&300|}}|
 
 ==== High Oil Pressure Bypass ====
   * 1986-1990 cases do not have provisions for a high oil pressure bypass valve. \\ The bypass valve is built into the removable oil filter housing that bolts to the front of the right case. \\ There is however a discharge hole in the case from the back of the filter housing into the cam case. \\ Oil released from the bypass valve dumps to the cam chest floor to run the scavenge route back to the oil tank.
   * 1991 cases have the oil filter mount cast into the right case (not removable). \\ The high pressure bypass is incorporated inside the case behind the oil filter mount and very noticeable with the cam cover off.
   * 1992-Up cases also have a high pressure oil bypass. It's not a valve but rather a tiny hole drilled into the upper right case. \\ The hole is drilled thru the case at the bottom of the upper feed galley above #2 cam gear. It doubles as an added spray of oil onto #2 cam gear. \\ But the hole is app .060" so it won't spray a lot of oil unless the pressure gets to a certain point in the oil feed path.    
@@ Line -396,7 +398,4 @@ removed created
 |  1986-2003 high pressure bypass configurations ((composite using pics from Robert Evans - c3-cycle-tech - gnarlydavidson1))  |
 |{{:techtalk:evo:engmech:1986-2003_sportster_right_case_high_pressure_bypass_-_from_robert_evans_-_c3-cycle-tech_-_gnarlydavidson1.jpg?direct&400|}}|
 
 
 
 
 ==== Primary / Transmission External Vent (1986-Present) ====
@@ Line -405,7 +404,5 @@ removed created
 |  1986-1990 Transmission Vent ((photo courtesy of c3cycle.com, Link to site: https://www.c3cycle.com/))  |  1991-1999 Transmission Vent ((photo courtesy of c3cycle.com, Link to site: https://www.c3cycle.com/))  |  2000-2003 Primary Vent ((photo courtesy of c3cycle.com, Link to site: https://www.c3cycle.com/))  |
 |{{:techtalk:evo:engmech:1986-1990_sportster_primary-transmission_vent_by_c3-cycle-tech.jpg?direct&300|}}|{{:techtalk:evo:engmech:1991-1999_transmission_-_primary_vent_location_by_c3-cycle-tech.jpg?direct&300|}}|{{:techtalk:evo:engmech:2000-2003_sportster_transmission-primary_vent_by_c3-cycle-tech.jpg?direct&300|}}|
 ===== Motor mounts =====
 
 ==== Rear mounts ====
 
 \\

Trace: • REF: Engine Mechanicals - Sub-05D • REF: Carburetor, Intake Manifold & Exhaust - Sub-01W • REF: Engine Mechanicals • REF: Tools & Fasteners • EVO: Engine Mechanicals • EVO: Engine Mechanicals - Sub-04A • EVO: Transmission & Final Drive • REF: Engine Mechanicals - Sub-05F • REF: Engine Mechanicals - Sub-03A • EVO: Engine Mechanicals - Sub-01F