I have two Suzuki two cycle engines, one has bad rings and piston, and the other one has a bent crankshaft. I was going to just get each's respective part(s) and have 2 21"s. Since I have never worked on a 2 cycle before, how do you get the piston with the rings into the casing. Do you have to put the tool around just the piston, and then push it in. And then connect the crankshaft back again, or is there another way. The tool I am talking about is a hollow cylinder that has bolts that make it tighten.