My latest take on filtering the oil in the venerable xs650...
Previously I had built a spin-on sump filter (sump plate) for my engine, however, a couple of things did not sit well with me on that design
1. The ground clearance and the possibility to strike the filter housing
2. The only filters I could find in a lower profile for that application were from more modern sports bikes and all had ADBV's installed - not my preference for a filter on the suction side of an oil pump as the flow becomes limited unless there is enough suction to lift the ADBV off its seat, not really in the design brief of the xs's oil pump.
Since I have done away with the starter motor I went about designing my own filter adaptor that mounts into the starter spigot and that could hold a spin on filter cartridge.
I chose to use a filter from an EVO Harley motor for a couple of reasons -
1. I already have an EVO HD and have the required filters on-hand
2. They have no ADBV so flow without restriction on the suction circuit.
3. While not filtering to the levels of more modern spin-on cartridges, they still filter to ~ 30 microns, somewhat better than the standard gauze in the xs engine.
4. An increase in oil capacity by ~ 250ml
5. Its size allows fitment into the starter void and the ability to spin-on/off in situ.
6. Price for replacement filters cartridges is around $10 AUD or $8 USD
7. Personal preference - I dislike the standard strainer and actually like to filter my oil (cue violins from the "Yamaha knows best" crowd).
As a matter of design, the oil supply from the filter adaptor has to run to a custom sump plate via a piece of 1/2" oil line, which then obviously feeds the pump. The mounting boss of the adaptor is sealed with a Viton o-ring in the starter spigot. Additionally, stainless hardware was utilized to mount both the adaptor and sump plate.
I don't have any photos of when I was making the adaptor but will upload if it is removed for any reason.
This photo shows the adaptor mounted to the two inner-most starter mounting bosses and the filter installed as well as the transfer line.
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Custom mounting plate with flush designed bolts and drain.
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View of filter, adaptor, and transfer line.
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No loss of ground clearance
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Sump plate
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Sump plate and transfer line.
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I was thinking about having a small run of these machined up via CNC but am not sure if it is an item that is both needed or would sell...
I'll update some of these photos to my "long rod motor" thread when I can.
Ciao