Table of Contents
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REF: Oiling & Lubrication
Sportster Oil Pressure (57 to Present)
Expected oil pump pressure per FSM's:
Gauge mounted at oil pump
As checked with hot oil and a gauge at the oil pressure switch location at the oil pump.
The oil pressure switch has to be removed for the gauge to be installed.
1957-1969: 1)
Minimum: 3-7 psi (idle, with spark retarded)
Normal riding conditions: 10-14 psi (6 psi at 20 mph)
1970-1978: 2)
Minimum: 3-7 psi (idle)
Maximum: 15 psi (60 mph in high gear)
Normal riding conditions: 4-15 psi
1979-1985: 3)
Minimum: 4-7 psi (idle)
Maximum: 10-20 psi (3500 rpm)
Normal riding conditions: 4-15 psi
Gauge mounted at tappet hole plug
As checked with hot oil and a gauge at the plug hole on the engine case between the tappets.
The plug between the tappets has to be removed for the gauge to be installed.
1986-1990: 4) 5)
Minimum: 1-7 psi (idle)
Normal riding conditions: 5-30 psi (2500 rpm)
1991: 6)
Minimum: 7-12 psi (idle)
Normal riding conditions: 12-17 psi (2500 rpm)
Gauge mounted at oil filter pad
As checked with hot oil and a gauge at the oil pressure switch location at oil filter pad.
The oil pressure switch has to be removed for the gauge to be installed.
1986-1990: 7)
Oil pressure, when checked at the oil filter pad (oil pressure switch removed), will be 6-10 psi higher than when checked at the tappet plug on the case at idle.
See pressure figures above when checked at the tappet plug hole.
1992-2004: 8) 9) 10) 11) 12) 13) 14)
Minimum: 7-12 psi (idle speed varies from 950-1050 rpm between the different FSMs)
Normal riding conditions: 10-17 psi (2500 rpm)
2013 XR1200X: 15)
Minimum: 16-20 psi (idle)
Normal riding conditions: 40-44 psi (2500 rpm)
Oil pressure relief (50 psi)
- It includes an oil cooler with a thermostat that starts to open at 190ºF (88ºC).
- The oil pump and the head breathers are a new design.
The oil pump rotors are driven by the cams, the feed rotor is driven off the front intake cam and the scavenge rotor is driven by the rear exhaust cam.
