Spin on filter and cooler.
This was a modification I made to the lubrication system some time ago.

The XS650 has two oil strainers, one in the sump and one in the right side cover. As said, they are strainers rather than filters and as such not particularly good at filtering the oil. The system works thus: There is an oil pump in the right side cover, it draws oil from the sump via the sump strainer, The pump pumps oil up a 10mm hole toward the front of the side cover, the 10mm hole is stoppered at the front of the cover via a 10mm bung. The 10mm hole from the pump is cross drilled from the right side cover, so the oil is pumped through the 10mm hole then off at a right angle via the cross drilling through a strainer contained within the right side cover then on to the engine.

So to fit a remote spin on filter I removed the bung at the front of the side cover, mounted the side cover on the drill press table and angled it so the 10mm hole from the oil pump was vertical. The hole is set at an odd angle on two axis’ to the cover, so setting the 10mm hole vertical was a job in itself. Once setup correctly, I drilled the 10mm hole out to 10.8mm then tapped it to M12 x 1.25 for 40mm so passing the cross drilling to the side cover strainer, I then countersunk the top of the hole to allow for an O ring and inserted a stainless spigot I turned up and threaded. This spigot covers the cross drilling leading to the side cover strainer.

I binned the side cover strainer cover and machined up a new one. Took a bit of doing this part as there is a raised section in the middle to allow for oil inlet and the outer side had to be angled to follow the angle of the side cover. Rather than use an ugly screw in fitting, I spun up a stainless barb and pressed it in place in the front of the raised section.

hose t