Differences

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

--- techtalk:evo:engmech02 [2024/01/03 17:31] – hippysmack
+++ techtalk:evo:engmech02 [2025/09/16 17:59] (current) – [1991-Up Lifters] hippysmack
@@ Line 3: / Line 3: @@
 ====== EVO: Engine Mechanicals ======
+====== Camshafts ======
+==== Sub Documents ====
-The Camshafts (4 of them) are used to operate the intake and exhaust valves by means of the lifters (AKA: tappets), the pushrods and the rocker arms. The #2 Cam is driven by the Pinion Gear. The Pinion Gear is mounted on the Pinion Shaft which is part of the Flywheel Assembly.
+  * [[techtalk:evo:engmech02e|Cam Grind Comparisons]]
-#1 Cam - Rotates CW -- Operates Rear Exhaust Valve\\
-#2 Cam - Rotates CCW - Operates Rear Intake Valve - Driven by Pinion Gear\\
-#3 Cam - Rotates CW -- Operates Front Intake Valve\\
-#4 Cam - Rotates CCW - Operates Front Exhaust Valve\\
-====== Camshafts ======
+The Camshafts (4 of them) are used to operate the intake and exhaust valves by means of the lifters (AKA: tappets), the pushrods and the rocker arms. The #2 Cam is driven by the Pinion Gear. The Pinion Gear is mounted on the Pinion Shaft which is part of the Flywheel Assembly.
+  * #1 Cam - Rotates CW -- Operates Rear Exhaust Valve
+  * #2 Cam - Rotates CCW - Operates Rear Intake Valve - Driven by Pinion Gear
+  * #3 Cam - Rotates CW -- Operates Front Intake Valve
+  * #4 Cam - Rotates CCW - Operates Front Exhaust Valve
+===== Cam Oiling =====
 The cams get oiled by drainage from the rocker boxes and splash oil in the bottom end. \\
 Oil flows off the pushrod side of the rocker boxes through the pushrod covers, into vertical holes in the lifter bores and into the gearcase. \\
@@ Line 195: / Line 199: @@
 ===== Checking Lifter Pre-load =====
 Hydraulic lifters self-adjust over about a .100" range, from .050" preloaded to .150" preloaded. ((aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/160330-squish-band-clearance?t=1720575)) \\
 They'll actually work outside that range but they might make noise, so it's best to stay in that range. \\
@@ Line 218: / Line 221: @@
 |{{:techtalk:evo:oil:cam_alignment_by_aswracing.jpg?direct&300|}}|{{:techtalk:evo:oil:lifter_oiling_by_aswracing.jpg?direct&300|}}|
-====== 1986-1990 models ======
+====== 1986-1990 Lifters ======
+These year motors have off-center lifters. If you run a straight line through the center of the lifter, it does not go through the center of the cam. It's offset to one side, to give the lobe a better angle of attack when raising the lifter. \\
 There was a running change in 1986 to new style hydraulic lifters as opposed to the original 1986 versions for Sportsters. ((1986-1990 HD Sportster FSM pg 3-44)) \\
 They were the same as those used in 1340cc engines beginning in the 1986 model year. The change was to allow for one component to service the entire product line. \\
@@ Line 240: / Line 245: @@
 {{:techtalk:evo:engmech:86_engine_8_by_xtremraptor.jpg?direct&300|}} ((photo by xtremraptor of the XLFORUM)) {{:techtalk:evo:engmech:86_engine_4_by_xtremraptor.jpg?direct&300|}} ((photo by xtremraptor of the XLFORUM)) \\
-====== 91-99 Lifters ======
+====== 1991-Up Lifters ======
+-up motors have on-center lifters. In other words, it's a straight line through the center of the lifter to the center of the cam underneath it. \\
+===== 1991-1999 Lifters =====
 -1999 engines have AMC-Mopar style lifters (.903" diameter). (("A 4 liter V8 eater" of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/148387-100-ci-s-s-cases?t=1611832)) \\
@@ Line 258: / Line 266: @@
 |{{:techtalk:evo:oil:inlet_hole_1_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:hole_toward_the_crankcase_1_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:hole_toward_the_crankcase_2_by_hippysmack.jpg?direct&300|}}|
-===== 91-99 Anti-Rotation Pins =====
+==== 1991-1999 Anti-Rotation Pins ====
 **Parts**: \\
 - screws (884) \\
@@ Line 283: / Line 291: @@
 |{{:techtalk:evo:engmech:91-99_anti-rotation_pins_4_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:engmech:91-99_anti-rotation_pins_5_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:engmech:91-99_anti-rotation_pins_6_by_hippysmack.jpg?direct&300|}}|
-====== 2000 and Up Lifters ======
+===== 2000 and Up Lifters =====
 and up have GM/twin cam style lifters (.842" diameter). ((aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/148387-100-ci-s-s-cases?t=1611832)) \\
@@ Line 297: / Line 305: @@
 |{{:techtalk:evo:oil:2002_cam_chest_by_scuba10jdl.jpg?direct&300|}}|{{:techtalk:evo:oil:inside_right_case_by_meherdad_it.jpg?direct&300|}}|
-===== 00-05 Lifter Ant-Rotation Screws =====
+==== 2000-2005 Lifter Ant-Rotation Screws ====
 **Parts**: \\
 - anti-rotation screws (18532) \\
@@ Line 310: / Line 317: @@
 |{{:techtalk:evo:engmech:00-05_anti-rotation_pins_1_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:engmech:00-05_anti-rotation_pins_2_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:engmech:00-05_anti-rotation_pins_3_by_hippysmack.jpg?direct&300|}}|
-|  End of screws run up into the case. ((photos by JohnK of the XLFORUM http://xlforum.net/forums/showthread.php?t=1422877&page=6))  ||
+|  End of screws run up into the case. ((photos by JohnK of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-motor-top-end/132786-fixing-a-leaky-top-end-with-pics/page6?t=1422877&page=6))  ||
 |{{:techtalk:evo:oil:05_tappet_screws_1_by_johnk.jpg?direct&300|}}|{{:techtalk:evo:oil:05_tappet_screws_2_by_johnk.jpg?direct&300|}}|
-===== 06-Up Anti-Rotation Device =====
+==== 2006-Up Anti-Rotation Device ====
 **Parts**: \\
 - Anti Rotation Device blocks (18505-06) \\
-The ARD is a flexible piece of plastic that is designed to flex in operation to allow for an imperfect lifter bore location. ((aswracing of the XLFORUM  http://xlforum.net/forums/showthread.php?t=1768265&page=28)) \\
+The ARD is a flexible piece of plastic that is designed to flex in operation to allow for an imperfect lifter bore location. ((aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/164458-cannibal-queen-conversion-cam-carnage/page28?t=1768265&page=28)) \\
 It is designed for lifters that have a flat cut on each side. \\
 These work OK for stock cams. \\
-But if you're upgrading to bigger cams, anything more than .600 lift has too small a base circle. ((rocketmangb of the XLFORUM http://xlforum.net/forums/showthread.php?p=5613140&highlight=anti+rotation#post5613140)) \\
+But if you're upgrading to bigger cams, anything more than .600 lift has too small a base circle. ((rocketmangb of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/rubber-mount-sportster-motorcycle-talk-2004-2006/22223-carb-rubbermount-collector-s-item/page10?highlight=anti+rotation#post4145786)) \\
 (and they will nearly drop out of the ARDs and they can also spin away from them) \\
 The big issue is that they turn sideways with the roller not turning on the cam lobe. \\
 (which can heat up and destroy the roller and the cam lobe) \\
-|  ARD block ((photo by rocketmangb of the XLFORUM http://xlforum.net/forums/showthread.php?t=1768265&page=31))  |  ARD block installed ((photo by chris_b_owens of the XLFORUM http://xlforum.net/forums/showthread.php?p=5042968))  |
+|  ARD block ((photo by rocketmangb of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/164458-cannibal-queen-conversion-cam-carnage/page31?t=1768265&page=31))  |  ARD block installed ((photo by chris_b_owens of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/171908-2013-883-cafe-hammer-performance-1250-conversion/page2#post3670671))  |
 |{{:techtalk:evo:engmech:06_ard_by_rocketmangb.jpg?direct&300|}}|{{:techtalk:evo:engmech:2013_ard_by_chris_b_owens.jpg?direct&300|}}|
 ====== Pinion Gear ======
   * **Removal / Installation of the Pinion Gear**:
-    * __Lock the pinion shaft itself, not from the brake pedal, primary side, pistons or anywhere else__: \\ It's very important to hold the crank still from the gearcase side to torque the pinion nut on or off (usually done by holding the pinion gear still). \\ If you, for example, put the bike in gear and hold the rear brake and torque on the nut, you run the very real risk of knocking the crank out of true. \\ (which requires a full tear-down to fix). \\ It's not designed to transmit torque from one side to the other and it tries to twist the crankpin connection. \\ You'll need a tool to lock the pinion gear for removal or installation. See [[techtalk:ref:tools133#and_up_models_5_speed|tool options]] in the REF section of the Sportsterpedia. \\ Again, holding the flywheel still by any method on the other side of the flywheel assembly or top side runs the risk of knocking the wheels out of true.
+      * __Lock the pinion shaft itself, not from the brake pedal, primary side, pistons or anywhere else__: \\ It's very important to hold the crank still from the gearcase side to torque the pinion nut on or off (usually done by holding the pinion gear still). \\ If you, for example, put the bike in gear and hold the rear brake and torque on the nut, you run the very real risk of knocking the crank out of true. \\ (which requires a full tear-down to fix). \\ It's not designed to transmit torque from one side to the other and it tries to twist the crankpin connection. \\ You'll need a tool to lock the pinion gear for removal or installation. See [[:techtalk:ref:tools133#and_up_models_5_speed|tool options]] in the REF section of the Sportsterpedia. \\  Again, holding the flywheel still by any method on the other side of the flywheel assembly or top side runs the risk of knocking the wheels out of true.
-    * **Pinion Nut**: \\ __Torque Specs__: \\ The 86-87 pinion gear is located by 6 internal splines mating between 6 external splines on the pinion shaft. \\ There is a lockwasher (7044A) between the nut and the pinion gear. \\ Pry the tabs on it up to remove the pinion nut, bend them down against the flats on the nut to install. \\ Factory torque is (35-45 ft/lbs.) \\ The 1988-up pinion gear is located by a little nub of the key that sits under the oil pump drive gear. \\ That little nub is not nearly strong enough by itself to keep the gear from shearing on the pinion shaft. \\ And instead, it's the clamp load from the nut that keeps the pinion gear where we want it. \\ The factory torque spec on the pinion nut (35-45 ft/lbs). \\ Per Hammer Performance, that has proven woefully inadequate to hold the pinion gear in place (esp. with high pressure valve springs). \\ They highly recommend using 70 ft/lbs of torque instead ((http://hammerperf.com/ttxlcaminstall.shtml#pinionnut)) (as do other performance shops, Zippers cam instructions etc,). \\ __Loctite__: \\ Use red Loctite on the shaft threads per the manual but don't just slather it all over the threads. \\ All it takes is a light bead around 2 or three threads (in the middle of where the nut will end up when tightened. \\ There is no reason to use Loctite on the nut.
+      * **Pinion Nut**: \\ __Torque Specs__: \\ The 86-87 pinion gear is located by 6 internal splines mating between 6 external splines on the pinion shaft. \\ There is a lockwasher (7044A) between the nut and the pinion gear. \\ Pry the tabs on it up to remove the pinion nut, bend them down against the flats on the nut to install. \\ Factory torque is (35-45 ft/lbs.) \\ The 1988-up pinion gear is located by a little nub of the key that sits under the oil pump drive gear. \\ That little nub is not nearly strong enough by itself to keep the gear from shearing on the pinion shaft. \\ And instead, it's the clamp load from the nut that keeps the pinion gear where we want it. \\ The factory torque spec on the pinion nut (35-45 ft/lbs). \\ Per Hammer Performance, that has proven woefully inadequate to hold the pinion gear in place (esp. with high pressure valve springs). \\ They highly recommend using 70 ft/lbs of torque instead ((http://hammerperf.com/ttxlcaminstall.shtml#pinionnut))  (as do other performance shops, Zippers cam instructions etc,). \\ __Loctite__: \\ Use red Loctite on the shaft threads per the manual but don't just slather it all over the threads. \\ All it takes is a light bead around 2 or three threads (in the middle of where the nut will end up when tightened. \\ There is no reason to use Loctite on the nut.
+**Compatibility**  ((From HD Parts Catalogs 2004 pg 17, 2005 pg 19, 2006 pg 19, 2007 pg 19, 2008 pg 19, 2009 pg 25-27, 2010 pg 25-27, 2011 pg 25-27, 2012 pg 25-27, 2013 pg 29-31, 2014 pg 17, 2015 pg 19, 2016 pg 19))   \\ 1986-2003 parts books do not list a part number for the pinion gear and it appears the pinion gear is part of the cam gear set (not sold separately). \\ However, a gear could be ordered from the MoCo. The part# coincides with the color scheme coding on the respective cam sets. \\ 2000-up pinion gear part number is (24047-00) as appearing in the 2004-up parts catalogs. \\ 1986–1987 pinion gears have a (6-spline) pinion shaft. \\ 1988-up pinion gears have no splines and have a notch out the back side (not under) to slide around a woodruff key on the non-splined pinion shaft. \\ 1986-1999 pinion gears have the same coarse (13) tooth pitch. \\ 2000-up pinion gears have a fine (23) tooth pitch. \\ XL Pinion Gear Color/Size Info here: [[https://www.xlforum.net/showthread.php?t=1963918|https://www.xlforum.net/showthread.php?t=1963918]] \\
-**Compatibility** ((From HD Parts Catalogs 2004 pg 17, 2005 pg 19, 2006 pg 19, 2007 pg 19, 2008 pg 19, 2009 pg 25-27, 2010 pg 25-27, 2011 pg 25-27, 2012 pg 25-27, 2013 pg 29-31, 2014 pg 17, 2015 pg 19, 2016 pg 19)) \\
+**Part numbers and color coding**: \\ 1986-1999 cams continued the color coding as in previous years for optimum noise reduction in the gear mesh. \\ However, from 1986-1990, there were even more color combinations including cam drive gear sizes. \\ Each factory pinion gear was colored coded with a dot (even though it was more like a splotch at times) that matched the same colors on the matching cam drive gear. \\ 1986-1990 cam drive gears came with either one dot or two dots. Their corresponding pinion gear also came with one or two dots respectively to that gear set. \\ 1991-1999 cam drive gears were only colored with one dot and likewise, there will only be one dot on their respective pinion gear. \\ 2000-Up factory pinion gears have no color codes. \\ ^{{:techtalk:miscres:instruction_sheet_header_4.png?nolink&450}}|||||||^{{:techtalk:miscres:instruction_sheet_header_4.png?nolink&450}}||||||||
--2003 parts books do not list a part number for the pinion gear and it appears the pinion gear is part of the cam gear set (not sold separately). \\
-However, a gear could be ordered from the MoCo. The part# coincides with the color scheme coding on the respective cam sets. \\
--up pinion gear part number is (24047-00) as appearing in the 2004-up parts catalogs. \\
-–1987 pinion gears have a (6-spline) pinion shaft. \\
--up pinion gears have no splines and have a notch out the back side (not under) to slide around a woodruff key on the non-splined pinion shaft. \\
--1999 pinion gears have the same coarse (13) tooth pitch. \\
--up pinion gears have a fine (23) tooth pitch. \\
-XL Pinion Gear Color/Size Info here:
-http://xlforum.net/forums/showthread.php?t=1963918 \\
-**Part numbers and color coding**: \\
--1999 cams continued the color coding as in previous years for optimum noise reduction in the gear mesh. \\
-However, from 1986-1990, there were even more color combinations including cam drive gear sizes. \\
-Each factory pinion gear was colored coded with a dot (even though it was more like a splotch at times) that matched the same colors on the matching cam drive gear. \\
--1990 cam drive gears came with either one dot or two dots. Their corresponding pinion gear also came with one or two dots respectively to that gear set. \\
--1999 cam drive gears were only colored with one dot and likewise, there will only be one dot on their respective pinion gear. \\
--Up factory pinion gears have no color codes. \\
-^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&450|}}|||||||^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&450|}}||||||||
+|  **Factory Pinion Gears by Part Number and Color of Dots**   (★ = 1 Dot, ★★ = 2 Dots)  ||||||||||||||||
-|  **Factory Pinion Gears by Part Number and Color of Dots** (★ = 1 Dot, ★★ = 2 Dots)  ||||||||||||||||
+|  **1986-1987 Sportster**    ||||||||  **1988-1990 Sportster**    ||||||||
-|  **1986-1987 Sportster**  ||||||||  **1988-1990 Sportster**  ||||||||
 |Part#|Brown|Blue|Red|White|Green|Yellow|Black|Part#|Brown|Blue|Red|White|Green|Yellow|Black|
-|24055-86|  ★  |  |  |  |  |  |  |24055-88|  ★  |
+|24055-86|  ★  |   |   |   |   |   |   |24055-88|  ★  | | | | | | |
-|24056-86|  |  ★  |  |  |  |  |  |24056-88|  |  ★  |
+|24056-86|   |  ★  |   |   |   |   |   |24056-88|   |  ★  | | | | | |
-|24057-86|  |  |  ★  |  |  |  |  |24057-88|  |  |  ★  |
+|24057-86|   |   |  ★  |   |   |   |   |24057-88|   |   |  ★  | | | | |
-|24058-86|  |  |  |  ★  |  |  |  |24058-88|  |  |  |  ★  |
+|24058-86|   |   |   |  ★  |   |   |   |24058-88|   |   |   |  ★  | | | |
-|24059-86|  |  |  |  |  ★  |  |  |24059-88|  |  |  |  |  ★  |
+|24059-86|   |   |   |   |  ★  |   |   |24059-88|   |   |   |   |  ★  | | |
-|24060-86|  |  |  |  |  |  ★  |  |24060-88|  |  |  |  |  |  ★  |
+|24060-86|   |   |   |   |   |  ★  |   |24060-88|   |   |   |   |   |  ★  | |
-|24061-86|  |  |  |  |  |  |  ★  |24061-88|  |  |  |  |  |  |  ★  |
+|24061-86|   |   |   |   |   |   |  ★  |24061-88|   |   |   |   |   |   |  ★  |
-|25737-86|  ★★  |  |  |  |  |  |  |25737-88|  ★★  |
+|25737-86|  ★★  |   |   |   |   |   |   |25737-88|  ★★  | | | | | | |
-|25738-86|  |  ★★  |  |  |  |  |  |25738-88|  |  ★★  |
+|25738-86|   |  ★★  |   |   |   |   |   |25738-88|   |  ★★  | | | | | |
-|25739-86|  |  |  ★★  |  |  |  |  |25739-88|  |  |  ★★  |
+|25739-86|   |   |  ★★  |   |   |   |   |25739-88|   |   |  ★★  | | | | |
-|25740-86|  |  |  |  ★★  |  |  |  |25740-88|  |  |  |  ★★  |
+|25740-86|   |   |   |  ★★  |   |   |   |25740-88|   |   |   |  ★★  | | | |
-|25741-86|  |  |  |  |  ★★  |  |  |25741-88|  |  |  |  |  ★★  |
+|25741-86|   |   |   |   |  ★★  |   |   |25741-88|   |   |   |   |  ★★  | | |
-|25742-86|  |  |  |  |  |  ★★  |  |25742-88|  |  |  |  |  |  ★★  |
+|25742-86|   |   |   |   |   |  ★★  |   |25742-88|   |   |   |   |   |  ★★  | |
-|25743-86|  |  |  |  |  |  |  ★★  |25741-88|  |  |  |  |  |  |  ★★  |
+|25743-86|   |   |   |   |   |   |  ★★  |25741-88|   |   |   |   |   |   |  ★★  |
-^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&450|}}|||||||^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&450|}}||||||||
+^{{:techtalk:miscres:instruction_sheet_header_4.png?nolink&450}}^^^^^^^^{{:techtalk:miscres:instruction_sheet_header_4.png?nolink&450}}^^^^^^^|
-|  **Factory Pinion Gears by Part Number and Color of Dots**  ||||||||||||||||
+|  **Factory Pinion Gears by Part Number and Color of Dots**    ||||||||||||||||
-|  **1991-1999 Sportster**  ||||||||  **2000-Up Sportsters**  ||||||||
+|  **1991-1999 Sportster**    ||||||||  **2000-Up Sportsters**    ||||||||
 |Part#|Brown|Blue|Red|White|Green|Yellow|Black|Part#|24047-00|No Color Coding||||||
-|24055-91|  ★  |  |  |  |  |  |  |  ||||||||
+|24055-91|  ★  |   |   |   |   |   |   |   ||||||||
-|24056-91|  |  ★  |  |  |  |  |  |:::|:::|:::|:::|:::|:::|:::|:::|
+|24056-91|   |  ★  |   |   |   |   |   | ::: ||||||||
-|24057-91|  |  |  ★  |  |  |  |  |:::|:::|:::|:::|:::|:::|:::|:::|
+|24057-91|   |   |  ★  |   |   |   |   | ::: ||||||||
-|24058-91|  |  |  |  ★  |  |  |  |:::|:::|:::|:::|:::|:::|:::|:::|
+|24058-91|   |   |   |  ★  |   |   |   | ::: ||||||||
-|24059-91|  |  |  |  |  ★  |  |  |:::|:::|:::|:::|:::|:::|:::|:::|
+|24059-91|   |   |   |   |  ★  |   |   | ::: ||||||||
-|24060-91|  |  |  |  |  |  ★  |  |:::|:::|:::|:::|:::|:::|:::|:::|
+|24060-91|   |   |   |   |   |  ★  |   | ::: ||||||||
-|24061-91|  |  |  |  |  |  |  ★  |:::|:::|:::|:::|:::|:::|:::|:::|
+|24061-91|   |   |   |   |   |   |  ★  | ::: ||||||||
-\\
--1987 Sportster (18T) Pinion Gear: \\
+-1987 Sportster (18T) Pinion Gear: \\ Has internal splines. \\ {{:techtalk:evo:engmech:pinion_gear_1986-1987_pic1_by_c3-cycle-tech.jpg?direct&300|pinion_gear_1986-1987_pic1_by_c3-cycle-tech.jpg}}((photo courtesy of c3cycle.com, Link to site:https://www.c3cycle.com/)) {{:techtalk:evo:engmech:pinion_gear_1986-1987_pic2_by_c3-cycle-tech.jpg?direct&300|pinion_gear_1986-1987_pic2_by_c3-cycle-tech.jpg}}((photo courtesy of c3cycle.com, Link to site:https://www.c3cycle.com/)) {{:techtalk:evo:engmech:pinion_gear_1986_and_oil_pump_drive_gear_by_boyd117.jpg?direct&}}((photo by Boyd117 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/frame-mount-evo-sportster-talk-1986-2003-models/147571-1986-sporty-build/page3?t=1603701&page=3))
-Has internal splines. \\
-{{:techtalk:evo:engmech:pinion_gear_1986-1987_pic1_by_c3-cycle-tech.jpg?direct&300|}}  ((photo courtesy of c3cycle.com, Link to site:https://www.c3cycle.com/)) {{:techtalk:evo:engmech:pinion_gear_1986-1987_pic2_by_c3-cycle-tech.jpg?direct&300|}}  ((photo courtesy of c3cycle.com, Link to site:https://www.c3cycle.com/)) {{:techtalk:evo:engmech:pinion_gear_1986_and_oil_pump_drive_gear_by_boyd117.jpg?direct&300|}} ((photo by Boyd117 of the XLFORUM http://xlforum.net/forums/showthread.php?t=1603701&page=3)) \\
--1990 Sportster (18T) Pinion Gear: \\
+-1990 Sportster (18T) Pinion Gear: \\ Has a notch cut out of the rear for the woodruff key (T-key) on the pinion shaft and no splines. \\ {{:techtalk:evo:engmech:pinion_gear_1988-1990_pic2_by_c3-cycle-tech.jpg?direct&300|pinion_gear_1988-1990_pic2_by_c3-cycle-tech.jpg}}((photo courtesy of c3cycle.com, Link to site:https://www.c3cycle.com/)) {{:techtalk:evo:engmech:pinion_gear_1988-1990_pic1_by_c3-cycle-tech.jpg?direct&300|pinion_gear_1988-1990_pic1_by_c3-cycle-tech.jpg}}((photo courtesy of c3cycle.com, Link to site:https://www.c3cycle.com/))
-Has a notch cut out of the rear for the woodruff key (T-key) on the pinion shaft and no splines. \\
-{{:techtalk:evo:engmech:pinion_gear_1988-1990_pic2_by_c3-cycle-tech.jpg?direct&300|}} ((photo courtesy of c3cycle.com, Link to site:https://www.c3cycle.com/)) {{:techtalk:evo:engmech:pinion_gear_1988-1990_pic1_by_c3-cycle-tech.jpg?direct&300|}} ((photo courtesy of c3cycle.com, Link to site:https://www.c3cycle.com/)) \\
--1999 Sportster (18T) Pinion Gear: \\
+-1999 Sportster (18T) Pinion Gear: \\ Has a ring cut around the circumference of it's rear sleeve, a notch cut out of the rear for the woodruff key (T-key) on the pinion shaft and no splines. \\ The ring around the sleeve may just be to distinguish the 91-99 gear from the 88-90 gear. \\ {{:techtalk:evo:engmech:pinion_gear_1991-1999_pic1_by_c3-cycle-tech.jpg?direct&300|pinion_gear_1991-1999_pic1_by_c3-cycle-tech.jpg}}((photo courtesy of c3cycle.com, Link to site:https://www.c3cycle.com/)) {{:techtalk:evo:engmech:pinion_gear_1991-1999_pic2_by_c3-cycle-tech.jpg?direct&300|pinion_gear_1991-1999_pic2_by_c3-cycle-tech.jpg}}((photo courtesy of c3cycle.com, Link to site:https://www.c3cycle.com/))
-Has a ring cut around the circumference of it's rear sleeve, a notch cut out of the rear for the woodruff key (T-key) on the pinion shaft and no splines. \\
-The ring around the sleeve may just be to distinguish the 91-99 gear from the 88-90 gear. \\
-{{:techtalk:evo:engmech:pinion_gear_1991-1999_pic1_by_c3-cycle-tech.jpg?direct&300|}} ((photo courtesy of c3cycle.com, Link to site:https://www.c3cycle.com/)) {{:techtalk:evo:engmech:pinion_gear_1991-1999_pic2_by_c3-cycle-tech.jpg?direct&300|}} ((photo courtesy of c3cycle.com, Link to site:https://www.c3cycle.com/)) \\
--Up Sportster (23T) Pinion Gear: \\
+-Up Sportster (23T) Pinion Gear: \\ The ring around the rear sleeve was deleted, has a notch cut out of the rear for the woodruff key (T-key) on the pinion shaft, finer gear mesh and no splines. \\ {{:techtalk:evo:engmech:pinion_gear_2000-up_sportster_pic2_c3-cycle-tech.jpg?direct&300|pinion_gear_2000-up_sportster_pic2_c3-cycle-tech.jpg}}(( photo courtesy of c3cycle.com, Link to site:https://www.c3cycle.com/)) {{:techtalk:evo:engmech:pinion_gear_2000-up_sportster_pic1_c3-cycle-tech.jpg?direct&300|pinion_gear_2000-up_sportster_pic1_c3-cycle-tech.jpg}}(( photo courtesy of c3cycle.com, Link to site:https://www.c3cycle.com/))
-The ring around the rear sleeve was deleted, has a notch cut out of the rear for the woodruff key (T-key) on the pinion shaft, finer gear mesh and no splines. \\
-{{:techtalk:evo:engmech:pinion_gear_2000-up_sportster_pic2_c3-cycle-tech.jpg?direct&300|}} ((photo courtesy of c3cycle.com, Link to site:https://www.c3cycle.com/)) {{:techtalk:evo:engmech:pinion_gear_2000-up_sportster_pic1_c3-cycle-tech.jpg?direct&300|}} ((photo courtesy of c3cycle.com, Link to site:https://www.c3cycle.com/)) \\
-\\
 ===== Possible 91-up Woodruff Key Failure Notice =====
@@ Line 411: / Line 388: @@
 [[techtalk:ref:genmsr07#possible_causes_of_a_spun_pinion_shaft_gear|Click Here]] for more information in the Sportsterpedia. \\
-{{:techtalk:evo:engmech:pinion_nub_by_aswracing.jpg?direct&250|}} ((photo by http://xlforum.net/forums/showthread.php?t=1666277 of the XLFORUM http://xlforum.net/forums/showthread.php?t=1666277)) \\
+{{:techtalk:evo:engmech:pinion_nub_by_aswracing.jpg?direct&250|}} ((photo by aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/155417-pinion-gear?t=1666277)) \\
 ====== Timing Cup (Rotor) ======
 |Timing cup bolt thread size: #10x32 \\ Wrench size: 5/16" \\ Torque: 43-53 in/lbs ((1998 XLH FSM pg 7-56)) \\ Use Loctite 242 (blue) on the bolt threads ((1998 XLH FSM pg 7-56))|
 |{{:techtalk:evo:engmech:timing_cup_bolt_wrench_4_by_hippysmack.jpg?direct&300|}}|

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