Whelp, it can be best case you need to add a heavier weight oil..low amount of oil shouldnt matter. The pump could be going bad or have a blockage (not sure you can easily access the pump on your bike (ANYONE??) on your bike but on your next oil change you can look for anything remotely like sludge to indicate at least one type of block. Or if it were me, I'd raise the idle 100rpm and ride on till my next change then go with a heavier oil
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