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I have always used the Harley Cup Wrench but I don't know if filter covers are getting smaller or what but it slips on tight filters. Had to wrap duct tape around filter and struggled to get loose on two bikes this weekend. I oil filter gaskets and only tighten a little after they seat but they been real stubborn lately.
Do I just need a new cup wrench? I have seen Rivco Wrenches mentioned but they look like they would be hard to get good leverage.
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