Posts tagged Radiators

Swapping the KX500 Radiator Cap onto the XR650R

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Many owners will swap the 1.1 Bar rated radiator cap that comes stock on the XR650R for an aftermarket unit. The goal is the prevent the radiators from boiling over as easily. It’s a somewhat debated topic in that using a higher pressure cap will increase the strain throughout the entire system. Most have positive experiences with switching radiator caps. Personally, I prefer to keep mine stock.

The 1992-1996 Kawasaki KX500 Radiator cap is 1.8 Bar and can be swapped directly onto the XR650R. The Kawasaki part number is: 49085-1059

There is also a SRC 1.6 Radiator Cap for the XR650R available new. As well as a Stant Manufacturing Radiator cap for the XR650R.

SRC High Pressure Radiator Cap for the XR650R

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Many owners will swap the 1.1 Bar rated radiator cap that comes stock on the XR650R for an aftermarket unit. The goal is the prevent the radiators from boiling over as easily. It’s a somewhat debated topic in that using a higher pressure cap will increase the strain throughout the entire system. Most have positive experiences with switching radiator caps. Personally, I prefer to keep mine stock.

The SRC (Scott Summers Racing Components) unit is rated at 1.6 Bar and is part number 1672. It looks like this:

You can also swap the radiator cap from a KX500 onto the XR650R. As well as a Stant Manufacturing Radiator cap for the XR650R.

Honda XR650R Radiators and Thermostat – Parts Fiche

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Parts fiche for the Honda XR650R Radiators and Thermostat.

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