to answer ur question... yes it will... flinging is kinda part of the design of this type of oilers...especially scottoilers. as when it flings, it will bring the dirt on the chain along with it. once of the reasons why chains can last longer with scottoilers. my z900 has been on scottoiler since about 1k km... am at 60k+ now with the same factory chain... at 35k i opened up the front sprocket cover n the area was clean to the point that no cleaning was needed...just cover back up.
i dunno why ppl ask this question.... coz seriously... what wont? all oso will fling...

just wash the rear wheel once a month at the same time u wash ur bike oso ok edi...or the same time u wash ur chain. its part of maintenance. use kerosene n a paint/detailing brush to get the gunk off the rim easier.

if wan rim clean n proper all the time... dont use any lube ever... n completely remove rear brakes. no lube n no brake dust on wheel...clean for much much longer