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techtalk:evo:engmech04b [2021/07/23 03:57] hippysmack [Middle Rocker Box Spacer (91-03)] |
techtalk:evo:engmech04b [2024/01/04 01:17] (current) hippysmack |
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| Most of these aren't mandatory unless you notice a problem upon inspection. \\ | Most of these aren't mandatory unless you notice a problem upon inspection. \\ | ||
| If problems are found, below are some examples of how those have been addressed. \\ | If problems are found, below are some examples of how those have been addressed. \\ | ||
| + | |||
| ====== Clearancing the Rocker Boxes ====== | ====== Clearancing the Rocker Boxes ====== | ||
| Rocker shaft to Rocker box clearance for all XL’s is 0.0007” to 0.0022”. ((2000 MMI Documents)) \\ | Rocker shaft to Rocker box clearance for all XL’s is 0.0007” to 0.0022”. ((2000 MMI Documents)) \\ | ||
| - | High lift cams or changes in the valve springs can cause contact in the rocker box. ((Scuba10jdl of the XLFORUM http://xlforum.net/forums/showthread.php?p=5601873&highlight=rocker+wear#post5601873)) \\ | + | High lift cams or changes in the valve springs can cause contact in the rocker box. ((Scuba10jdl of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-motor-top-end/191485-sporty-had-tough-time-across-the-country?highlight=rocker+wear#post4134598)) \\ |
| - | When you have high lift cams, as the rockers push your valves open they are also putting a sideways pressure on the valve stems. ((mikeLI_77 of the XLFORUM http://xlforum.net/forums/showthread.php?p=5601873&highlight=rocker+wear#post5601873)) \\ | + | When you have high lift cams, as the rockers push your valves open they are also putting a sideways pressure on the valve stems. ((mikeLI_77 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-motor-top-end/191485-sporty-had-tough-time-across-the-country?highlight=rocker+wear#post4134598)) \\ |
| Even if you haven't installed performance parts or have acquired a bike that you're unfamiliar with; \\ | Even if you haven't installed performance parts or have acquired a bike that you're unfamiliar with; \\ | ||
| Inspecting the rocker boxes can clue you in to possible problems from wear before it's too late. \\ | Inspecting the rocker boxes can clue you in to possible problems from wear before it's too late. \\ | ||
| - | If something were to wear down or overheat or come lose for instance. ((Scuba10jdl of the XLFORUM http://xlforum.net/forums/showthread.php?p=5601873&highlight=rocker+wear#post5601873)) \\ | + | If something were to wear down or overheat or come lose for instance. ((Scuba10jdl of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-motor-top-end/191485-sporty-had-tough-time-across-the-country?highlight=rocker+wear#post4134598)) \\ |
| - | Worn valve guides can also offset the spring travel and let them hit the covers. ((mikeLI_77 of the XLFORUM http://xlforum.net/forums/showthread.php?p=5601873&highlight=rocker+wear#post5601873)) ((http://xlforum.net/forums/showthread.php?t=2042454&highlight=rocker+wear&page=3)) \\ | + | Worn valve guides can also offset the spring travel and let them hit the covers. ((mikeLI_77 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-motor-top-end/191485-sporty-had-tough-time-across-the-country?highlight=rocker+wear#post4134598)) ((https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-motor-top-end/191485-sporty-had-tough-time-across-the-country/page3?t=2042454&highlight=rocker+wear&page=3)) \\ |
| When using bronze valve guides, they are cut shorter to allow for valve clearancing. \\ | When using bronze valve guides, they are cut shorter to allow for valve clearancing. \\ | ||
| That causes the valve guides to wear out in an hour glass shape. \\ | That causes the valve guides to wear out in an hour glass shape. \\ | ||
| When the valve retainers hit the rocker boxes it pushes the valves sideways and wears out the inside of the valve guides faster than usual. \\ | When the valve retainers hit the rocker boxes it pushes the valves sideways and wears out the inside of the valve guides faster than usual. \\ | ||
| - | Adding clearance in the rocker box is not described in the FSMs since the factory took care of that when they built it. ((http://www.hammerperf.com/ttinstallkit.shtml#ClearanceBoxes)) ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?p=5568677&highlight=remove+rocker+box#post5568677)) \\ | + | Adding clearance in the rocker box is not described in the FSMs since the factory took care of that when they built it. ((http://www.hammerperf.com/ttinstallkit.shtml#ClearanceBoxes)) ((aswracing 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/190518-cam-gear-stuck?highlight=remove+rocker+box#post4107435)) \\ |
| But it's incredibly important with OEM modifications or a performance build to check clearances in the rocker box. \\ | But it's incredibly important with OEM modifications or a performance build to check clearances in the rocker box. \\ | ||
| Anytime you deviate from factory setups, it's not optional to overlook this step. \\ | Anytime you deviate from factory setups, it's not optional to overlook this step. \\ | ||
| Line 41: | Line 42: | ||
| Then remove the cover and see if anything got up intp the clay and where. \\ | Then remove the cover and see if anything got up intp the clay and where. \\ | ||
| - | Pull the tops and look for little marks on the inside. ((HAMMERSALES of the XLFORUM http://xlforum.net/forums/showthread.php?t=1120605)) \\ | + | Pull the tops and look for little marks on the inside. ((HAMMERSALES of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/116559-back-with-another-cam-question?t=1120605)) \\ |
| There shouldn't be any outside of factory casting marks. \\ | There shouldn't be any outside of factory casting marks. \\ | ||
| Rocker or pushrod contact will appear as marks that shouldn't be there. \\ | Rocker or pushrod contact will appear as marks that shouldn't be there. \\ | ||
| Line 49: | Line 50: | ||
| This is rare, but it can happen. \\ | This is rare, but it can happen. \\ | ||
| - | Contact here should cause any damage, but it'll cause noise and leaks. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?p=5489961)) \\ | + | Contact here should cause any damage, but it'll cause noise and leaks. ((aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-buell-motorcycle-racing/sportster-motorcycle-drag-racing/186625-lets-see-your-off-season-builds/page16#post4033634)) \\ |
| A lot of rocker box top leaks have been traced to this. | A lot of rocker box top leaks have been traced to this. | ||
| - | | Rocker box top damage ((photos by aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?p=5489961)) || Claying the upper rocker cover ((photo by new2HDfrank of the XLFORUM http://xlforum.net/forums/showthread.php?t=964678&page=4))| | + | | Rocker box top damage ((photos by aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-buell-motorcycle-racing/sportster-motorcycle-drag-racing/186625-lets-see-your-off-season-builds/page16#post4033634)) || Claying the upper rocker cover ((photo by new2HDfrank of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/106931-just-another-1250-transformation-but-it-s-mine/page4?t=964678&page=4))| |
| |{{:techtalk:evo:engmech:rocker_box_clearance_3_by_aswracing.jpg?direct&300|}}|{{:techtalk:evo:engmech:rocker_box_clearance_4_by_aswracing.jpg?direct&300|}}|{{:techtalk:evo:engmech:claying_the_upper_rocker_box_by_new2hdfrank.jpg?direct&300|}}| | |{{:techtalk:evo:engmech:rocker_box_clearance_3_by_aswracing.jpg?direct&300|}}|{{:techtalk:evo:engmech:rocker_box_clearance_4_by_aswracing.jpg?direct&300|}}|{{:techtalk:evo:engmech:claying_the_upper_rocker_box_by_new2hdfrank.jpg?direct&300|}}| | ||
| - | |||
| ===== Lower Rocker Box / Cover (All) ===== | ===== Lower Rocker Box / Cover (All) ===== | ||
| ==== Check for Warpage ==== | ==== Check for Warpage ==== | ||
| - | When you have the lower rocker boxes removed, be sure to check their flatness on pane of glass or other extremely flat surface. ((ReddTigger of the XLFORUM http://xlforum.net/forums/showthread.php?t=1732579&highlight=rocker+box+inserts&page=2)) | + | When you have the lower rocker boxes removed, be sure to check their flatness on pane of glass or other extremely flat surface. ((ReddTigger of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-motor-top-end/161350-rocker-covers-leaking-argh/page2?t=1732579&highlight=rocker+box+inserts&page=2)) |
| - | ===== Spring Clearance ===== | + | |
| + | ===== Spring Clearance ===== | ||
| The most critical clearance in the rocker box is the clearance between the valve springs and all areas of the rocker box around it. ((http://www.hammerperf.com/ttinstallkit.shtml#ClearanceBoxes)) \\ | The most critical clearance in the rocker box is the clearance between the valve springs and all areas of the rocker box around it. ((http://www.hammerperf.com/ttinstallkit.shtml#ClearanceBoxes)) \\ | ||
| Line 72: | Line 72: | ||
| With a conventional straight wound performance spring pack, it will almost certainly be an issue. \\ | With a conventional straight wound performance spring pack, it will almost certainly be an issue. \\ | ||
| - | Check for clearance issues between the valve spring / collar and the rocker box. ((HAMMERSALES of the XLFORUM http://xlforum.net/forums/showthread.php?t=1120605)) \\ | + | Check for clearance issues between the valve spring / collar and the rocker box. ((HAMMERSALES of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/116559-back-with-another-cam-question?t=1120605)) \\ |
| When running big springs and cams, the additional lift can run the springs into the inside edge of the rocker. \\ | When running big springs and cams, the additional lift can run the springs into the inside edge of the rocker. \\ | ||
| Line 82: | Line 82: | ||
| That's one of the nice things about the 7mm valves with beehive springs in the late heads, it eliminates this problem. \\ | That's one of the nice things about the 7mm valves with beehive springs in the late heads, it eliminates this problem. \\ | ||
| - | | Lower rocker damage from valve spring impact ((photos by ReddTigger of the XLFORUM http://xlforum.net/forums/showthread.php?p=4593655)) ||| | + | | Lower rocker damage from valve spring impact ((photos by ReddTigger of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-motor-top-end/157656-rocker-box-clearance-damage#post3347479)) ||| |
| |{{:techtalk:evo:engmech:rocker_box_damage_1_by_reddtigger.jpg?direct&200|}}|{{:techtalk:evo:engmech:rocker_box_damage_2_by_reddtigger.jpg?direct&250|}}|{{:techtalk:evo:engmech:rocker_box_damage_3_by_reddtigger.jpg?direct&300|}}| | |{{:techtalk:evo:engmech:rocker_box_damage_1_by_reddtigger.jpg?direct&200|}}|{{:techtalk:evo:engmech:rocker_box_damage_2_by_reddtigger.jpg?direct&250|}}|{{:techtalk:evo:engmech:rocker_box_damage_3_by_reddtigger.jpg?direct&300|}}| | ||
| - | Valve spring clearance is a very common issue with high performance straight wound springs. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?p=5489961)) \\ | + | Valve spring clearance is a very common issue with high performance straight wound springs. ((aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-buell-motorcycle-racing/sportster-motorcycle-drag-racing/186625-lets-see-your-off-season-builds/page16#post4033634)) \\ |
| Back before we went to beehive springs, this was a major headache for us. \\ | Back before we went to beehive springs, this was a major headache for us. \\ | ||
| People would lose valve seal and swear up and down they clearanced their rocker boxes adequately. \\ | People would lose valve seal and swear up and down they clearanced their rocker boxes adequately. \\ | ||
| Line 97: | Line 97: | ||
| What you're looking for is to make sure the spring cannot contact the side of the box. \\ | What you're looking for is to make sure the spring cannot contact the side of the box. \\ | ||
| - | The clearancing can be done with a drum sander on a dremel type rotary tool ((rottenralph of the XLFORUM http://xlforum.net/forums/showthread.php?t=1120605&page=2)) or a die grinder. \\ | + | The clearancing can be done with a drum sander on a dremel type rotary tool ((rottenralph of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/116559-back-with-another-cam-question/page2?t=1120605&page=2)) or a die grinder. \\ |
| - | |Big springs can cause this issue. ((photos by Brianharristattoo of the XLFORUM http://xlforum.net/forums/showthread.php?p=5489961))|The clearancing job doesn't have to be pretty. \\ You're just creating space for the springs to miss the rocker. ((photo by aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1120605&page=2))| | + | |Big springs can cause this issue. ((photos by Brianharristattoo of the XLFORUM https://www.xlforum.net/forum/sportster-buell-motorcycle-racing/sportster-motorcycle-drag-racing/186625-lets-see-your-off-season-builds/page16#post4033634))|The clearancing job doesn't have to be pretty. \\ You're just creating space for the springs to miss the rocker. ((photo by aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/116559-back-with-another-cam-question/page2?t=1120605&page=2))| |
| |{{:techtalk:evo:engmech:rocker_box_to_spring_clearance_by_brianharristattoo.jpg?direct&200|}}|{{:techtalk:evo:engmech:rocker_box_clearance_5_by_aswracing.jpg?direct&300|}}| | |{{:techtalk:evo:engmech:rocker_box_to_spring_clearance_by_brianharristattoo.jpg?direct&200|}}|{{:techtalk:evo:engmech:rocker_box_clearance_5_by_aswracing.jpg?direct&300|}}| | ||
| You can use a Sharpie marking pen or other to mark where the springs are too close so you'll know where to relieve the rocker box. \\ | You can use a Sharpie marking pen or other to mark where the springs are too close so you'll know where to relieve the rocker box. \\ | ||
| - | |Before clearancing. ((photo by aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?p=5489961))|Top view ((photo by isiahstites of the XLFORUM http://xlforum.net/forums/showthread.php?t=51598&page=10))| | + | |Before clearancing. ((photo by aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-buell-motorcycle-racing/sportster-motorcycle-drag-racing/186625-lets-see-your-off-season-builds/page16#post4033634))|Top view ((photo by isiahstites of the XLFORUM https://www.xlforum.net/forum/sportster-buell-motorcycle-racing/lsr-sporster-buell-motorcycle-land-speed-record/31067-my-ls-build/page10?t=51598&page=10))| |
| |{{:techtalk:evo:engmech:rocker_box_clearance_1_by_aswracing.jpg?direct&200|}}|{{:techtalk:evo:engmech:rocker_box_clearance_1_by_isiahstites.jpg?direct&300|}}| | |{{:techtalk:evo:engmech:rocker_box_clearance_1_by_aswracing.jpg?direct&200|}}|{{:techtalk:evo:engmech:rocker_box_clearance_1_by_isiahstites.jpg?direct&300|}}| | ||
| - | |After clearancing. ((photo by aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?p=5489961))|Top view ((photo by isiahstites of the XLFORUM http://xlforum.net/forums/showthread.php?t=51598&page=10))| | + | |After clearancing. ((photo by aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-buell-motorcycle-racing/sportster-motorcycle-drag-racing/186625-lets-see-your-off-season-builds/page16#post4033634))|Top view ((photo by isiahstites of the XLFORUM https://www.xlforum.net/forum/sportster-buell-motorcycle-racing/lsr-sporster-buell-motorcycle-land-speed-record/31067-my-ls-build/page10?t=51598&page=10))| |
| |{{:techtalk:evo:engmech:rocker_box_clearance_2_by_aswracing.jpg?direct&200|}}|{{:techtalk:evo:engmech:rocker_box_clearance_2_by_isiahstites.jpg?direct&300|}}| | |{{:techtalk:evo:engmech:rocker_box_clearance_2_by_aswracing.jpg?direct&200|}}|{{:techtalk:evo:engmech:rocker_box_clearance_2_by_isiahstites.jpg?direct&300|}}| | ||
| - | | Another rocker clearancing project. ((photos by cjburr of the XLFORUM http://xlforum.net/forums/showthread.php?t=44421&page=13)) ||| | + | | Another rocker clearancing project. ((photos by cjburr of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/26816-cj-s-1250-conversion/page13?t=44421&page=13)) ||| |
| |{{:techtalk:evo:engmech:clearancing_rocker_box_2_by_cjburr.jpg?direct&300|}}|{{:techtalk:evo:engmech:clearancing_rocker_box_1_by_cjburr.jpg?direct&300|}}|{{:techtalk:evo:engmech:clearancing_rocker_box_3_by_cjburr.jpg?direct&300|}}| | |{{:techtalk:evo:engmech:clearancing_rocker_box_2_by_cjburr.jpg?direct&300|}}|{{:techtalk:evo:engmech:clearancing_rocker_box_1_by_cjburr.jpg?direct&300|}}|{{:techtalk:evo:engmech:clearancing_rocker_box_3_by_cjburr.jpg?direct&300|}}| | ||
| ===== Arm Clearance ===== | ===== Arm Clearance ===== | ||
| - | |||
| This condition was noticed when using S&S roller rocker arms and big cams. \\ | This condition was noticed when using S&S roller rocker arms and big cams. \\ | ||
| But these areas can be checked while using stock or other rocker arms also. \\ | But these areas can be checked while using stock or other rocker arms also. \\ | ||
| - | Symptoms were a ticking noise on the top end on cold starts. ((madnss of the XLFORUM http://xlforum.net/forums/showthread.php?t=1776474&highlight=rocker+arm+bushings)) \\ | + | Symptoms were a ticking noise on the top end on cold starts. ((madnss of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-motor-top-end/165126-big-cams-s-s-roller-rockers?t=1776474&highlight=rocker+arm+bushings)) \\ |
| The roller rockers were just grazing the rocker box assembly. \\ | The roller rockers were just grazing the rocker box assembly. \\ | ||
| All 4 were just barely nicking the box. \\ | All 4 were just barely nicking the box. \\ | ||
| Line 124: | Line 123: | ||
| Clearance can be done with a die grinder or Dremil Tool. \\ | Clearance can be done with a die grinder or Dremil Tool. \\ | ||
| - | |Check for wear at the side of the pushrod arms at the box. ((photos by rocketmangb of the XLFORUM http://xlforum.net/forums/showthread.php?t=1776474&highlight=rocker+arm+bushings&page=4))|| | + | |Check for wear at the side of the pushrod arms at the box. ((photos by rocketmangb of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-motor-top-end/165126-big-cams-s-s-roller-rockers/page4?t=1776474&highlight=rocker+arm+bushings&page=4))|| |
| |{{:techtalk:evo:engmech:rocker_box_clearance_1_by_rocketmangb.jpg?direct&300|}}|{{:techtalk:evo:engmech:rocker_box_clearance_2_by_rocketmangb.jpg?direct&300|}}| | |{{:techtalk:evo:engmech:rocker_box_clearance_1_by_rocketmangb.jpg?direct&300|}}|{{:techtalk:evo:engmech:rocker_box_clearance_2_by_rocketmangb.jpg?direct&300|}}| | ||
| - | |Check for wear at the side of the valve arms at the box ((photos by onebrkbstrd of the XLFORUM http://xlforum.net/forums/showthread.php?t=1776474&highlight=rocker+arm+bushings&page=2))|| | + | |Check for wear at the side of the valve arms at the box ((photos by onebrkbstrd of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-motor-top-end/165126-big-cams-s-s-roller-rockers/page2?t=1776474&highlight=rocker+arm+bushings&page=2))|| |
| |{{:techtalk:evo:engmech:rocker_box_clearance_1_by_onebrkbstrd.jpg?direct&200|}}|{{:techtalk:evo:engmech:rocker_box_clearance_2_by_onebrkbstrd.jpg?direct&200|}}| | |{{:techtalk:evo:engmech:rocker_box_clearance_1_by_onebrkbstrd.jpg?direct&200|}}|{{:techtalk:evo:engmech:rocker_box_clearance_2_by_onebrkbstrd.jpg?direct&200|}}| | ||
| - | |You can see where the contact occurs. ((photos by madnss of the XLFORUM http://xlforum.net/forums/showthread.php?t=1776474&highlight=rocker+arm+bushings))|| | + | |You can see where the contact occurs. ((photos by madnss of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-motor-top-end/165126-big-cams-s-s-roller-rockers?t=1776474&highlight=rocker+arm+bushings))|| |
| |{{:techtalk:evo:engmech:rocker_box_clearance_1_by_madnss.jpg?direct&200|}}|{{:techtalk:evo:engmech:rocker_box_clearance_2_by_madnss.jpg?direct&200|}}| | |{{:techtalk:evo:engmech:rocker_box_clearance_1_by_madnss.jpg?direct&200|}}|{{:techtalk:evo:engmech:rocker_box_clearance_2_by_madnss.jpg?direct&200|}}| | ||
| - | |After clearancing the box. ((photos by madnss of the XLFORUM http://xlforum.net/forums/showthread.php?t=1776474&highlight=rocker+arm+bushings&page=7))||| | + | |After clearancing the box. ((photos by madnss of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-motor-top-end/165126-big-cams-s-s-roller-rockers/page7?t=1776474&highlight=rocker+arm+bushings&page=7))||| |
| |{{:techtalk:evo:engmech:rocker_box_clearance_5_by_madnss.jpg?direct&300|}}|{{:techtalk:evo:engmech:rocker_box_clearance_6_by_madnss.jpg?direct&300|}}|{{:techtalk:evo:engmech:rocker_box_clearance_7_by_madnss.jpg?direct&300|}}| | |{{:techtalk:evo:engmech:rocker_box_clearance_5_by_madnss.jpg?direct&300|}}|{{:techtalk:evo:engmech:rocker_box_clearance_6_by_madnss.jpg?direct&300|}}|{{:techtalk:evo:engmech:rocker_box_clearance_7_by_madnss.jpg?direct&300|}}| | ||
| - | |Rockers installed and not hitting the box anymore. ((photos by madnss of the XLFORUM http://xlforum.net/forums/showthread.php?t=1776474&highlight=rocker+arm+bushings&page=9))|| | + | |Rockers installed and not hitting the box anymore. ((photos by madnss of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-motor-top-end/165126-big-cams-s-s-roller-rockers/page9?t=1776474&highlight=rocker+arm+bushings&page=9))|| |
| |{{:techtalk:evo:engmech:rocker_box_clearance_3_by_madnss.jpg?direct&300|}}|{{:techtalk:evo:engmech:rocker_box_clearance_4_by_madnss.jpg?direct&300|}}| | |{{:techtalk:evo:engmech:rocker_box_clearance_3_by_madnss.jpg?direct&300|}}|{{:techtalk:evo:engmech:rocker_box_clearance_4_by_madnss.jpg?direct&300|}}| | ||
| - | |||
| \\ | \\ | ||
