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techtalk:ih:engmech04a [2019/06/14 17:29] hippysmack |
techtalk:ih:engmech04a [2019/06/14 19:14] hippysmack [Pros and Cons of Functionality] |
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**Pros**: \\ | **Pros**: \\ | ||
+ | There really is nothing to be gained by splitting the Rocker Boxes, it's purely Cosmetic. ((hoosier xlc of the XLFORUM http://xlforum.net/forums/showthread.php?t=130964&page=3)) \\ | ||
+ | It's just a matter of personal preference. But then again so is half the stuff folks do to their bikes. \\ | ||
+ | There is nothing different in splitting the rocker boxes than; \\ | ||
+ | Trimming the cam cover, drilling holes in the chain/belt guard, welding a hardtail section on a swing arm frame, \\ | ||
+ | Running the wires internally in the bars, a slick paint job, flat blacking everything, chroming everything, \\ | ||
+ | Installing 16"+ apes on HD's Sport Bike, adding a 250mm rear tire or side mounting a license plate. \\ | ||
+ | |||
+ | Some split the rocker boxes for adding dual plugged heads. The right side sparkplug is on the same angle as the left. ((fdny37 of the XLFORUM http://xlforum.net/forums/showthread.php?t=130964&page=3)) \\ | ||
+ | On some other dual plug bikes, the right side plug was installed more towards the top of the head and the boxes didn't require splitting. \\ | ||
+ | Cometic metal rocker gaskets seem to help with leaks. \\ | ||
+ | |||
If the rocker covers are doing a "hula dance" when in one full piece; ((Tim The Grim of the XLFORUM http://xlforum.net/forums/showthread.php?t=1719533&highlight=splitting+rocker+box&page=5)) \\ | If the rocker covers are doing a "hula dance" when in one full piece; ((Tim The Grim of the XLFORUM http://xlforum.net/forums/showthread.php?t=1719533&highlight=splitting+rocker+box&page=5)) \\ | ||
Once they are split, each half is no longer reacting to the flex caused by the opposing side and is therefore more stable. \\ | Once they are split, each half is no longer reacting to the flex caused by the opposing side and is therefore more stable. \\ | ||
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That is better than splitting the boxes. \\ | That is better than splitting the boxes. \\ | ||
+ | To dual plug the heads, the plug electrode location is what is critical, not the angle the plug screws in from. ((ryder rick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1682099&highlight=splitting+rocker+box)) \\ | ||
+ | You can use a small spark plug 12mm or even 10mm. A big plug doesn't make any bigger spark. \\ | ||
+ | {{:techtalk:ih:engmech:dual_plugging_ihs_1_by_ryder_rick.jpg?direct&300|}} ((photo by ryder rick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1682099&highlight=splitting+rocker+box)) \\{{:techtalk:ih:engmech:dual_plugging_ihs_2_by_ryder_rick.jpg?direct&300|}} ((photo by ryder rick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1682099&highlight=splitting+rocker+box)) \\ | ||
+ | |||
+ | ====== General Process Of Splitting the Rocker Box ====== | ||
+ | These are Shovelhead rocker boxes but the process is about the same. ((hoosier xlc of the XLFORUM http://xlforum.net/forums/showthread.php?t=130964)) \\ | ||
+ | The center portion where the front bolt goes was left on below to help give support once the pushrods are adjusted. \\ | ||
+ | (in an attempt to help eliminate the chance of a leak). | ||
+ | |||
+ | First start off with a good set of boxes. Spray a little layout die on them and lay them out for a reference line. ((photos by hoosier xlc of the XLFORUM http://xlforum.net/forums/showthread.php?t=130964)) \\ | ||
+ | |||
+ | |{{:techtalk:ih:engmech:splitting_rocker_boxes_1_by_hoosier_xlc.jpg?direct&300|}}|{{:techtalk:ih:engmech:splitting_rocker_boxes_2_by_hoosier_xlc.jpg?direct&300|}}|{{:techtalk:ih:engmech:splitting_rocker_boxes_3_by_hoosier_xlc.jpg?direct&300|}}| | ||
+ | |||
+ | Set each box in a vice and mill down the center. Then weld up the oil passages where the split was made. \\ | ||
+ | And clean up the areas modified to smooth things out. ((photos by hoosier xlc of the XLFORUM http://xlforum.net/forums/showthread.php?t=130964)) \\ | ||
+ | |||
+ | |{{:techtalk:ih:engmech:splitting_rocker_boxes_4_by_hoosier_xlc.jpg?direct&300|}}|{{:techtalk:ih:engmech:splitting_rocker_boxes_5_by_hoosier_xlc.jpg?direct&300|}}|{{:techtalk:ih:engmech:splitting_rocker_boxes_6_by_hoosier_xlc.jpg?direct&300|}}| | ||
+ | |||
+ | Lastly, you'll need to relocate the oil passages, and decide whether or not to polish or powder coat them. ((photos by hoosier xlc of the XLFORUM http://xlforum.net/forums/showthread.php?t=130964)) \\ | ||
+ | |||
+ | |{{:techtalk:ih:engmech:splitting_rocker_boxes_7_by_hoosier_xlc.jpg?direct&300|}}|{{:techtalk:ih:engmech:splitting_rocker_boxes_8_by_hoosier_xlc.jpg?direct&300|}}|{{:techtalk:ih:engmech:splitting_rocker_boxes_9_by_hoosier_xlc.jpg?direct&300|}}| | ||
====== Cut Down ====== | ====== Cut Down ====== | ||
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====== Other Split Rocker Box Pics ====== | ====== Other Split Rocker Box Pics ====== | ||
- | | 75 XLH ((photo by fdny37 of the XLFORUM http://xlforum.net/forums/showthread.php?t=120623)) | | + | | 75 XLH ((photo by fdny37 of the XLFORUM http://xlforum.net/forums/showthread.php?t=120623)) \\ These were split for the dual plug setup. ((photo by fdny37 of the XLFORUM http://xlforum.net/forums/showthread.php?t=130964&page=2)) | |
|{{:techtalk:ih:engmech:75_xlh_w_split_rocker_boxes_by_fdny37.jpg?direct&300|}}| | |{{:techtalk:ih:engmech:75_xlh_w_split_rocker_boxes_by_fdny37.jpg?direct&300|}}| | ||