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-techtalk:evo:transfinal02 [2019/04/07 01:49]
– [Final Drive (Trans to Wheel)] hippysmack
+
+techtalk:evo:transfinal02 [2024/01/09 02:00] (current)
– hippysmack
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 |{{:techtalk:evo:transfinal:1990_4_speed_1_by_dave76.jpg?direct&300|}}|{{:techtalk:evo:transfinal:1990_4_speed_2_by_dave76.jpg?direct&300|}}|{{:techtalk:evo:transfinal:1990_4_speed_3_by_dave76.jpg?direct&300|}}|
 |  1990 4 Speed Transmission ((photos by Dave 76 of the XLFORUM httphttps://www.xlforum.net/forumsforum/showthread.phpsportster-motorcycle-forum/sportster-motorcycle-drivetrain/sportster-motorcycle-transmission-clutch-primary-secondary-drive/73714-4-speed-info?t=513989&highlight=speed))  |||
 |{{:techtalk:evo:transfinal:1990_4_speed_4_by_dave76.jpg?direct&300|}}|{{:techtalk:evo:transfinal:1990_4_speed_5_by_dave76.jpg?direct&300|}}|{{:techtalk:evo:transfinal:88_4_speed_by_wi_duker.jpg?direct&300|}}|
 |  1990 4 Speed Transmission ((photos by Dave 76 of the XLFORUM httphttps://www.xlforum.net/forumsforum/showthread.phpsportster-motorcycle-forum/sportster-motorcycle-drivetrain/sportster-motorcycle-transmission-clutch-primary-secondary-drive/73714-4-speed-info?t=513989&highlight=speed))  ||  1988 4 Speed by WI_duker))  |  
 ====== Specifications ======
 
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 |Spring Force|Engaged: 304 lbs|Disengaged: 260 lbs|
 |Clutch shell bearing on clutch gear (loose)|0.0000 in-0.0010 in. / (0.0254 mm)|
 
 
 
 
 ===== Primary Drive (engine to transmission) =====
@@ Line -43,12 +41,8 @@ removed created
 |The MoCo publishes for 1986-1990 ((1986-1990 HD Sportster FSM pg 2-1))|1.5 pints (24 oz), (710 ml)|
   * This quantity is for a dry application. When changing oil, use your own judgement not to overfill as you won't need a full 1.5 pints to re-fill the oil.
 
 
 
 ===== Transmission =====
   * Internal Gear Ratios are the number of clutch gear revolutions to drive the mainshaft sprocket one revolution.
   * Overall Gear Ratios are the number of engine revolutions to drive rear wheel one revolution.
 
 
 
 ^Year (all models) Internal Gear Ratios^^^^^
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 |1986|10.00|7.25|5.48|3.97|
 |1987-1990|9.12|6.59|4.98|3.97|
 
 
 
 
 
 
 
 
 
 
 
 
 ===== Clutch Gear Mainshaft Ball Bearing =====
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 ^Year^Domestic Model(s)^Transmission Sprocket^Rear Wheel Sprocket^Ratio^
 |1986-1990|All Models((1986-1990 HD Sportster FSM pg 6-1))|21 Teeth|48 Teeth|2.29:1|
 
 
 
 ===== Fastener Torque Specs =====
  
 |Mainshaft nut locking screw|50 - 60 in-lbs.|
 |Mainshaft nut|35 - 65 ft-lbs.|
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     * Mainshaft fourth gear and second gear: .040 min. - .080 in. max.
     * Mainshaft third gear and second gear: .040 min. - .080 in. max.
 ===== Countershaft Group =====
 
 ===== Countershaft Group =====
   * Countershaft end bearings: Retained needle roller bearings
   * Countershaft needle bearing journal diameter:
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     * Countershaft second gear and third gear: .040 - .080 in. max.
   * Countershaft end play: .004 - .015 in. max.
 
 
 ==== Countershaft Low Gear Changes ====
 
 ^Countershaft Low Gear -17T^Change Year^Model(s)^Notes^
 |35760-84A \\ Late 1984-1990 ((1979-1985 HD Sportster Parts Catalog pg 51)) ((1986-1990 HD Sportster Parts Catalog pg 37))|Late 1984|
 
 
 ===== Discussion =====
 
 1986-90 Evo Sportsters: What every owner should know but were afraid to ask\\
 An [[httphttps://www.xlforum.net/forumsforum/showthread.phpsportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/frame-mount-evo-sportster-talk-1986-2003-models/183021-1986-90-evo-sportsters-what-every-owner-should-know-but-were-afraid-to-ask?t=1971026|__XLForum Thread__]] By Four Speed\\
 
 
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 \\
 [[:techtalk:menu|{{:techtalk:gototechnicalmenu.jpg|}}]]
 
 
 
 
 
  
   
 
  
 
 
 
 
 
 
 

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