Leave oil tank on and just take off chaincase outer shell. Torx with different length extensions, and a wobble on a couple with an air ratchet is quick and easy. Thighten with torque by hand on the case. Got to take off a t20 torx on plastic panel to pull the case off enough. While ur in there tighten the "self adjusting" tensioner. It can go almost as tight as it can get and still have enough/proper slack. When they put these together from factory they set the chain slack insanely loose. And these self adjusting tensioners dont self tension for $hit.