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01 Fatboy, 18k mikes. Primary gasket started leaking the other day. It's original. I purchased a replacement. Each time I've changed the primary oil I've used approx 24-26oz of primary fluid. When opening the primary to change the gasket and it emptying completely, how much primary oil should I need? I want to make sure I order the right amount (in case I'll need any from a second quart)
Different bikes with different size primaries will dictate the amount.... check with the service manual for your year bike... OR....
Just put in the usual amount, an then, with the bike standing up, off the jiffy stand, fill it up to the bottom of the clutch pack..
NOTE- my 88ci softail service manual says 26oz... the difference between drain/refill and cover-off refill is usually 4 to 6ozdepending on the size of the primary...... you should be fine with buying 1 quart.. Of course, never hurts to have a spare on hand...
Last edited by hattitude; Feb 27, 2018 at 10:54 AM.
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