S&S Cycle 53-80 BT Oil Passage Drill Jig

When you're installing an S&S oil pump assembly on an early Big Twin crankcase, you'll need to modify the oil passages to match. This hardened steel drill jig from S&S Cycle is the tool that helps you get those modifications done right. It's designed to guide your drill bit accurately, ensuring the correct placement and depth for critical oil passages.

This fixture allows for four specific modifications essential for proper oil flow. It helps create the primary chain oil supply passage from the breather valve gear cavity to the oil pump body on late generator and early alternator crankcases. It also enables the pressure relief passage from behind the main oil pressure valve to the gear cavity on alternator crankcases. Furthermore, it assists in creating the crankshaft and main bearings supply passages for both early alternator and generator crankcases. Using this jig ensures that these vital oiling circuits are correctly established, which is crucial for the longevity of your engine, especially when upgrading to a higher-performance oil pump.

This drill jig is a well-built tool made from hardened steel, designed for repeated use in a shop environment. It's a necessary component for builders working on a wide range of early Big Twin Harley-Davidson models, including popular examples like the FXRS Low Glide, FXST Softail Standard, and FXWG Wide Glide from the late 70s through the early 90s. Having the right jig makes a complex machining task much more manageable and accurate.