Expected oil pump pressure per FSM's:

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

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)

• The oil pump is not regulated during operation and it will deliver it's entire volume of oil under pressure to the oil filter mount. The oil pump is geared to the pinion shaft and operates faster (increasing oil pressure) or slower (decreasing oil pressure) depending on the revs used. Oil viscosity will affect oil pressure. On cold startup, the oil's viscosity is thicker and this will result in a higher oil pressure but circulation will be restricted somewhat. As the engine warms up, oil gets hot and thinner resulting in higher circulation and a decrease in oil pressure.
• Oil pressure readings are generally taken via the oil pressure switch outlet on the oil filter housing. Although, a gauge can be installed at the oil pump with the proper fittings. Installing a gauge on the rocker boxes won't do much good since the oil transferred from a hydraulic to a gravity and slung fluidity by the time it gets to the rockers. An adapter is usually added at the oil pump housing to split the piping to both the oil pressure regulator and the oil pressure gauge.
• Run the engine to normal operating temperature and check the gauge. At 2,500 RPM, oil pressure will vary between 10-17 psi (69-117 kN/m²). At idle speed, oil pressure will vary between 7-12 psi (48-83 kN/m²). ⁷⁾

• The 2013 XR1200X has an oil pressure relief valve Set at 50 psi. The idle oil pressure is 16 - 20 psi and at 2500 rpm it should be 40 - 44 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. ⁸⁾