| Both sides previous revisionPrevious revisionNext revision | Previous revision |
| techtalk:ref:engmech04g [2019/11/08 01:01] – hippysmack | techtalk:ref:engmech04g [2023/12/26 23:09] (current) – hippysmack |
|---|
| [[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] | [[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] |
| ====== REF: Engine Mechanicals - Sub-04G ====== | ====== REF: Engine Mechanicals - Sub-04G ====== |
| | |
| | See also in the Sportsterpedia: \\ |
| | |
| | * [[techtalk:ref:tools173#manometer_slack_tube_for_measuring_air_pressure|Manometer (slack tube) for Measuring Air Pressure]] |
| | * [[techtalk:ref:engmech04e|Building Your Own Slack Tube]] |
| | * [[techtalk:ref:genmsr04#using_diagnosing_with_a_slack_tube_manometer|Using / Diagnosing with a Slack Tube (Manometer)]] |
| | * [[techtalk:ref:engmech04|Evo Crankcase Pressure and Engine Breathing]] |
| | * [[techtalk:ref:engmech07p|Testing with a Slack Tube (Manometer) by bustert]] |
| | * [[techtalk:ref:genmsr04#using_diagnosing_with_a_slack_tube_manometer|Using / Diagnosing with a Slack Tube (Manometer)]] |
| | * [[techtalk:ref:oil05#engine_and_primary_oil_system_modifications|Engine and Primary Oil System Modifications]] |
| | * [[techtalk:ref:oil10|Wet Sumping]] |
| | * [[techtalk:ref:engmech05|Breather Venting / Relocation]] |
| | |
| \\ | \\ |
| ====== Slack tube testing on a 1998 1250S model ====== | ====== Slack tube testing on a 1998 1250S model ====== |
| All testing done with green coloring below was done with 36" ruler with reference zero at 18-1/8" on the ruler as shown below. \\ | All testing done with green coloring below was done with 36" ruler with reference zero at 18-1/8" on the ruler as shown below. \\ |
| |
| {{:techtalk:ref:engmech:homemade_slack_tube_2_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?p=5784790#post5784790)) {{:techtalk:ref:engmech:homemade_slack_tube_5_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?p=5784790#post5784790)) {{:techtalk:ref:engmech:hst_testing_reference_zero_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=79)) \\ | {{:techtalk:ref:engmech:homemade_slack_tube_2_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page52#post4349847)) {{:techtalk:ref:engmech:homemade_slack_tube_5_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page52#post4349847)) {{:techtalk:ref:engmech:hst_testing_reference_zero_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page79?t=2073932&page=79)) \\ |
| |
| ====== Summaries from Slack Tube Testing ====== | ====== Summaries from Slack Tube Testing ====== |
| | Before changing to new umbrellas; ((Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page84?t=2073932&page=84)) \\ |
| Before changing to new umbrellas; ((Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=84)) \\ | |
| - The rear umbrella was more stiff than the front one which was 'like new'. | - The rear umbrella was more stiff than the front one which was 'like new'. |
| - The oil cap could be removed at hot idle and the engine stumbled or died. | - The oil cap could be removed at hot idle and the engine stumbled or died. |
| The umbrella valves were in used state. The front umbrella had about 6 months use. \\ | The umbrella valves were in used state. The front umbrella had about 6 months use. \\ |
| |
| {{:techtalk:ref:engmech:hst_testing_reference_zero_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=79)) {{:techtalk:ref:engmech:hst_testing_1_at_1000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=79)) {{:techtalk:ref:engmech:hst_testing_1_at_2000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=79)) \\ | {{:techtalk:ref:engmech:hst_testing_reference_zero_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page79?t=2073932&page=79)) {{:techtalk:ref:engmech:hst_testing_1_at_1000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page79?t=2073932&page=79)) {{:techtalk:ref:engmech:hst_testing_1_at_2000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page79?t=2073932&page=79)) \\ |
| |
| {{:techtalk:ref:engmech:hst_testing_1_at_3000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=79)) {{:techtalk:ref:engmech:hst_testing_1_at_4000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=79)) {{:techtalk:ref:engmech:hst_testing_1_at_5000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=79)) \\ | {{:techtalk:ref:engmech:hst_testing_1_at_3000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page79?t=2073932&page=79)) {{:techtalk:ref:engmech:hst_testing_1_at_4000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page79?t=2073932&page=79)) {{:techtalk:ref:engmech:hst_testing_1_at_5000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page79?t=2073932&page=79)) \\ |
| |
| ===== Test after replacing the umbrellas ===== | ===== Test after replacing the umbrellas ===== |
| There was no noticeable sign of wetsumping or oil puking out the breathers even before any of this testing began. \\ | There was no noticeable sign of wetsumping or oil puking out the breathers even before any of this testing began. \\ |
| |
| {{:techtalk:ref:engmech:hst_testing_reference_zero_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=79)) {{:techtalk:ref:engmech:hst_testing_2_at_1000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=82)) {{:techtalk:ref:engmech:hst_testing_2_at_2000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=82)) \\ | {{:techtalk:ref:engmech:hst_testing_reference_zero_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page79?t=2073932&page=79)) {{:techtalk:ref:engmech:hst_testing_2_at_1000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page82?t=2073932&page=82)) {{:techtalk:ref:engmech:hst_testing_2_at_2000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page82?t=2073932&page=82)) \\ |
| |
| {{:techtalk:ref:engmech:hst_testing_2_at_3000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=82)) {{:techtalk:ref:engmech:hst_testing_2_at_4000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=82)) {{:techtalk:ref:engmech:hst_testing_2_at_5000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=82)) | {{:techtalk:ref:engmech:hst_testing_2_at_3000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page82?t=2073932&page=82)) {{:techtalk:ref:engmech:hst_testing_2_at_4000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page82?t=2073932&page=82)) {{:techtalk:ref:engmech:hst_testing_2_at_5000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page82?t=2073932&page=82)) |
| |
| ===== Test with reduced breather bolt orifices ===== | ===== Test with reduced breather bolt orifices ===== |
| |
| This was done to see what the affects were of the restricted breather bolts in 04-up engines. \\ | This was done to see what the affects were of the restricted breather bolts in 04-up engines. \\ |
| (to see if the restricted hole itself has an affect on pressure on the inside and if so how much) \\ | (to see if the restricted hole itself has an affect on pressure on the inside and if so how much) \\ |
| And it was easier to spot for oil mist from the bolts which there wasn't any. \\ | And it was easier to spot for oil mist from the bolts which there wasn't any. \\ |
| |
| {{:techtalk:ref:engmech:hst_testing_reference_zero_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=79)) {{:techtalk:evo:engmech:making_91-03_breather_bolt_holes_smaller_pic_5_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=84)) | {{:techtalk:evo:engmech:making_91-03_breather_bolt_holes_smaller_pic_5_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page84?t=2073932&page=84)) |
| {{:techtalk:evo:engmech:making_91-03_breather_bolt_holes_smaller_pic_7_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=84)) \\ | {{:techtalk:evo:engmech:making_91-03_breather_bolt_holes_smaller_pic_7_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page84?t=2073932&page=84)) \\ |
| |
| {{:techtalk:ref:engmech:hst_testing_3-1_at_1000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=85)) {{:techtalk:ref:engmech:hst_testing_3-2_at_1000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=85)) {{:techtalk:ref:engmech:hst_testing_3-2_restriction_at_2000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=85)) \\ | {{:techtalk:ref:engmech:hst_testing_reference_zero_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page79?t=2073932&page=79)) {{:techtalk:ref:engmech:hst_testing_2_at_1000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page82?t=2073932&page=82)) \\ |
| |
| {{:techtalk:ref:engmech:hst_testing_3-2_restriction_at_3000_rpm_by_hippysmack_2_.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=85)) {{:techtalk:ref:engmech:hst_testing_3-2_restriction_at_4000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=85)) {{:techtalk:ref:engmech:hst_testing_3-2_restriction_at_5000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=85)) \\ | {{:techtalk:ref:engmech:hst_testing_3-1_at_1000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page85?t=2073932&page=85)) {{:techtalk:ref:engmech:hst_testing_3-2_at_1000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page85?t=2073932&page=85)) {{:techtalk:ref:engmech:hst_testing_3-2_restriction_at_2000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page85?t=2073932&page=85)) \\ |
| | |
| | {{:techtalk:ref:engmech:hst_testing_3-2_restriction_at_3000_rpm_by_hippysmack_2_.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page85?t=2073932&page=85)) {{:techtalk:ref:engmech:hst_testing_3-2_restriction_at_4000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page85?t=2073932&page=85)) {{:techtalk:ref:engmech:hst_testing_3-2_restriction_at_5000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page85?t=2073932&page=85)) \\ |
| |
| ===== Test for oil cap issue when removed at idle ===== | ===== Test for oil cap issue when removed at idle ===== |
| The slack tube was hooked up to help diagnose the problem. \\ | The slack tube was hooked up to help diagnose the problem. \\ |
| |
| {{:techtalk:ref:engmech:hst_testing_reference_zero_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=79)) | {{:techtalk:ref:engmech:hst_testing_reference_zero_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page79?t=2073932&page=79)) \\ |
| | |
| | Before the new umbrellas, 3-3/4" (7-1/2" WC) of vacuum was lost while removing the oil cap and the engine died when removing the cap. \\ |
| | The idle changed with slight movements of the cap being closer to or farther away from the oil tank neck opening. \\ |
| | There was oil frothing in the oil tank with the cap off at idle. The frothing got less when the cap was 'slightly' off. \\ |
| | It didn't have any affect pulling the cap at cold idle. \\ |
| | |
| | {{:techtalk:ref:engmech:hst_testing_1_at_1000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page79?t=2073932&page=79)) {{:techtalk:ref:engmech:hst_testing_oil_cap_removed_at_1000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page79?t=2073932&page=79)) \\ |
| | |
| | The umbrellas were replaced with new ones and the test performed again. \\ |
| | The overall vacuum decreased at idle with the new umbrellas. \\ |
| | When the oil cap was removed, only 2-1/4" (4-1/2" WC) was lost and there was only a slight pitch change in the engine with no noticeable amount on the tach. \\ |
| | No frothing in the oil tank now with the cap removed at idle. So it appears the problem was a stiff umbrella valve (rear). \\ |
| | |
| | {{:techtalk:ref:engmech:hst_testing_2_at_1000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page82?t=2073932&page=82)) {{:techtalk:ref:engmech:hst_testing_2_at_1000_rpm_no_oil_cap_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page84?t=2073932&page=84)) \\ |
| | |
| | ===== Test with air cleaner removed ===== |
| | The A/C was removed to see if it had any impact on crankcase pressure testing. \\ |
| | There was no noticeable difference with it off through the RPM range tested up to 5000. \\ |
| | There was also no noticeable oil mist during this period. \\ |
| | Condensation and light oil mist accumulation at the bolts was from original testing before replacing the umbrellas. \\ |
| | But none of this is was in the filter and no oil puking. \\ |
| | |
| | {{:techtalk:ref:engmech:hst_testing_2_at_1000_rpm_no_ac_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page82?t=2073932&page=82)) |
| | {{:techtalk:ref:engmech:hst_testing_2_ac_removed_at_1000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page82?t=2073932&page=82)) \\ |
| |
| \\ | \\ |
