ATV Repair and Maintenance 2003 Sportsman 700 base gasket replacement December 9, 2015 I have 03 Sportsman 700 that leaks oil between the cylinder and the crankcase. I’m guessing it’s the base gasket. Can I change this with the block still in the bike? Or do I need to remove it? Any advise? Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related