I'm always wary of non-standard filters.
I have a friend who's a hydraulic engineer; he gave me a horror story of a company that had decided that they could put an uprated filter on their plant equipment... it stripped all the additives out of the fluid and the rams seized. Not a cheap fix for such a simple upgrade.
I'm not saying that the oil system on a Pulsar is the same as a hydraulic ram... I just figure that there's not much to oil filters really and I'd rather buy a standard one cheaper, and simply replace it more often.