Filter
The stock metal mesh filter can be cleaned and reused many times. My method is to backwash it under a hot water tap and then blow it dry.
The fine mesh stainless Scotts filters sound good (haven't heard any bad) , but the finer mesh could also create a greater pressure drop across the filter. This shouldn't be of concern if the YZF has more than adequate oil pressure to begin with, but then I wonder why Yamaha sized the mesh the way they did. If Scotts has found a way to increase filter area, this would negate any pressure loss to some extent. How quickly the filter will clog is also a factor in determining mesh size (and area), but again, this shouldn't be of any concern after the YZF is broken in.
I spec out filters and the mesh size for industrial pumps by asking people's opinions (including the pump vendor) but sometimes, I just make my best guess.:eek:
These are just thoughts, not a recommendation one way or the other. In the end, keeping fresh oil in the beast is the more critical part of maintenance.