Differences

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

--- techtalk:ref:svcproc11i [2021/08/28 00:32]
hippysmack [Threading the end of the shift drum for a nut]
+++ techtalk:ref:svcproc11i [2024/01/21 06:14]
hippysmack
@@ Line 9: / Line 9: @@
 **The OEM shaft groove depth, width and the shaft OD on the end are all made specifically to specs for the flexible retainer clip**. \\
-The groove depth is cut significantly deep to match the specs for the flex clip (app .085"). \\
+The groove depth is cut significantly deep to match the specs for the flex clip as well as the length of the groove (app .085"). \\
 So a regular circlip to replace the OEM one will require a washer behind it to take up that space between the circlip and the detent plate. \\
 The groove width is cut wide to allow for the clip to shoulder against the detent plate. \\
@@ Line 19: / Line 19: @@
 The OEM retainer ring is officially called an (External Bowed Locking Ring). \\
-|  OEM 91-03 detent plate and retainer ring ((photo by xLoneRiderx of the XLFORUM http://xlforum.net/forums/showthread.php?t=2078814&highlight=detent&page=20))  |
+|  OEM 91-03 detent plate and retainer ring ((photo by xLoneRiderx of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-motor-top-end/201713-1250-unhappiness-2020-edition/page20?t=2078814&highlight=detent&page=20))  |
 |{{:techtalk:ref:svcproc:shifter_detent_plate_11019_1991-2003_by_xloneriderx.jpg?direct&300|}}|
 ====== Sizing information for a retainer ring alternative ======
 There are some considerations when trying to spec an alternate retainer for the detent plate. \\
   - Any attempt to tighten the detent plate against the pins can result in transferring the load to and breaking the shift drum shaft end. \\ Normally the load is "handled" by the flexible OEM clip which softens side pressures against the tip where the clip is installed. \\ The flexible clip is another one of those pieces that is designed to fail before it's more important counterpart (shaft end) fails. \\ So keep in mind to check the shaft end with any opportunity given when the primary cover is off.
@@ Line 68: / Line 67: @@
 ===== Threading the end of the shift drum for a nut =====
+**Warning**: This mod is irreversible. You can not go back to the stock flex clip after performing this mod. \\
+If you change your mind later or the shaft/threads get messed up, you'll need to replace the entire drum. \\
 It is possible to grind the shaft end (where the retainer ring groove is) down to the correct size to cut threads with a die for a nut. \\
@@ Line 86: / Line 87: @@
       * 1/4"x20 UNC threads would require the shaft to sized to (.2450") or (6.223mm) dia. before threading.
   * **Sizing the shaft**.
-    * The front portion of the collar that the detent plate sits on and the tip of the shaft will need to be cut / ground to the groove OD. \\ The then the entire of the shaft from tip to detent plate will need to be turned down to the proper (pre tap) size for the die. \\ In this case, to use a 5mm nut, the shaft will need to be turned down to (4.92 mm) or (.1937") on a lathe. \\ If you have a lathe or access to one, just chuck the drum up and turn it down. \\ Or you can take the drum to a local machine shop and have them turn it down.
+    * The front portion of the collar that the detent plate sits on and the tip of the shaft will need to be cut / ground to the groove OD. \\ The then the entire of the shaft from tip to detent plate will need to be turned down to the proper (pre tap) size for the die. \\ In this case, to use a 5mm nut, the shaft will need to be turned down to (4.92 mm) or (.1937") on a lathe. \\ If you have a lathe or access to one, just chuck the drum up and turn it down. \\ Or you can take the drum to a local machine shop and have them turn it down and cut the threads.
+  * **Cutting the threads with a die**. \\ This has to be done right and straight. If you have any convictions about cutting the threads, don't cut them yourself. \\ You can always take the shift drum to a local machine shop and let them size the shaft and cut the threads. \\
+    * For a 5mm thread, you'll need a 5mm die and some cutting oil. Make a 30° chamfer on the end of the shaft to help start the die straight. \\ The shaft needs to be straight also or you'll end up cutting crooked threads along a crooked shaft (reason for the lathe work). \\ Start the die with the chamfered end toward the shaft and check for straightness as you turn. \\ Use 1/4 or 1/2 turns, back it off, clean, lube and repeat until you get to the end of the shaft cut. \\ Remove the die, clean, lube, turn it around to the non-chamfered end, install and finish cutting the threads to the butt of the shaft cut. \\ Remove the die, clean the threads and you're done.
 |  Shift drum shaft dims on 1998 Sportster ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=1985387&page=3))  | Length from shaft end to detent plate app .177" ((photo by xLoneRiderx of the XLFORUM, labeled by Hippysmack http://xlforum.net/forums/showthread.php?t=2078814&highlight=detent&page=19))|  Threaded shift drum shaft for nut mod ((photo by MatHormell of the XLFORM http://xlforum.net/forums/showthread.php?t=198227&page=3))  |

Trace:

Differences

Navigation

Search

Toolbox