years back I had a vac Scottoiler on my ZRX1200s the chain did over 25K Miles, easy to install but a pain in the a55 to set up I needed four setting summer, winter UK, summer France\ Spain and OMG it's so cold the oils solid, that said it did do the job.
it's easy with the XR as it has a centre stand I just use a can of lube and then clean the wheel.