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techtalk:ih:oil01 [2024/02/21 19:01] hippysmacktechtalk:ih:oil01 [2024/06/22 15:15] (current) – [Sub Documents] hippysmack
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 The transfer valve (25075-55) is installed in the left case between the primary and crankcase compartments. ((needspeed of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/200293-oil-transfer-valve-exposed?t=2077280)) \\ The transfer valve (25075-55) is installed in the left case between the primary and crankcase compartments. ((needspeed of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/200293-oil-transfer-valve-exposed?t=2077280)) \\
 There is only one moving part in the transfer valve assembly which is the triangular shaped disc in the pics below. \\ There is only one moving part in the transfer valve assembly which is the triangular shaped disc in the pics below. \\
-It'a triangular piece of .009" thick stainless steel that can move about .015" left to right in the valve. There is no spring. \\+**Dims**: The valve disc is a triangular piece of .009" thick stainless steel that can move about .015" left to right in the valve assembly\\ 
 +The ID of the thru hole of the assembly is .097". ((needspeed of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/4948557-oil-pump-questions/page8#post4949279)) There is no spring to hold the disc to it's seat. \\
 In a running engine, it is a one way valve that lets air and oil pass through it from primary case to flywheel case. \\ In a running engine, it is a one way valve that lets air and oil pass through it from primary case to flywheel case. \\