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techtalk:ref:engmech01s [2019/05/21 20:51] – created hippysmacktechtalk:ref:engmech01s [2023/12/25 23:22] (current) – hippysmack
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 ====== REF: Engine Mechanicals - Sub-01S ====== ====== REF: Engine Mechanicals - Sub-01S ======
 ====== Windage Tray / Flywheel Scraper ====== ====== Windage Tray / Flywheel Scraper ======
 +These are in two separate pieces. ((aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/49717-flywheel-scraper?t=203160)) \\
 +The scraper peels the oil off the flywheels and sends it down under the windage tray. \\
 +The windage tray isolates the oil under the flywheels so that windage from the flywheels doesn't kick it back up again. \\
 +
 +The back end of the windage tray, where it meets the case and the scraper, has some half-moon style cutouts to allow scraped oil to go past. \\
 +The front of the windage tray attaches to the factory windage barrier. \\
 +It's basically an extension of the factory windage control.
 +
 +The scraper needs to be .010" to .020" from the flywheels to work properly. \\
 +The main thing is getting it all to fit, such that it works properly and the cases can be bolted back together without interference. \\
 +Takes a little trial and error, bending, filing, checking, repeat. \\
 +
 +There's some drilling and fitting and filing work to install it, but it's not difficult. \\
 +You could make one yourself if you want, but the kit saves time and trouble. \\
 +When installing this mod, make sure you put some sealer of some kind on the fasteners that pass through into the transmission area. \\
 +Otherwise oil will seep through and fill your primary. \\
 +
 +|  Commercial XL engine flywheel scraper ((photo by aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/49717-flywheel-scraper?t=203160))  |
 +|{{:techtalk:ref:engmech:flywheel_scraper_by_aswracing.jpg?direct&300|}}|
 +
 +|  Homemade XL engine flywheel scraper ((photos by AussieGuzza of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/87710-aussiegazzas-rebuild/page11?t=692835&page=11)) ((https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/87710-aussiegazzas-rebuild/page12?t=692835&page=12))  |||
 +|{{:techtalk:ref:engmech:flywheel_scraper_6_by_aussiegazz.jpg?direct&300|}}|{{:techtalk:ref:engmech:flywheel_scraper_3_by_aussiegazz.jpg?direct&300|}}|{{:techtalk:ref:engmech:flywheel_scraper_1_by_aussiegazz.jpg?direct&300|}}|
 +
 +|{{:techtalk:ref:engmech:flywheel_scraper_2_by_aussiegazz.jpg?direct&300|}}|{{:techtalk:ref:engmech:flywheel_scraper_5_by_aussiegazz.jpg?direct&300|}}|{{:techtalk:ref:engmech:flywheel_scraper_4_by_aussiegazz.jpg?direct&300|}}|
 +
 +Here's how it's done on S&S cases. \\
 +Notice how it has a scraper built right into the cases, that peels oil off. \\
 +It then goes through a reed valve to the chamber below, where the scavenge inlet resides. \\
 +The advantage to this method is that the reed valve prevents any vacuum (from the pistons going up) from being seen at the scavenge inlet. \\
 +Putting vacuum on the scavenge inlet plays hell with scavenging. \\
 +We never see wet-sumping issues with this setup the way we do on stock (XL) case motors. ((aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/49717-flywheel-scraper?t=203160)) \\
 +
 +|  S&S engine w/ built in flywheel scraper ((photo by aswracing https://www.xlforum.net/forum/vendors/nrhs-high-performance/33374-04s-and-up-and-oil-use/page28?t=59421&page=28))  |
 +|{{:techtalk:evo:oil:ss_wet_sumping_fix_by_aswracing.jpg?direct&300|}}|
  
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