Just put that in last night. No instructions, seem like everything you get now has no instructions, but did a little Google search and figured it out. I was also explained on what to do when I ordered it from Boondockers. ( Instructions still would have been nice) Basically pull the old one out with a 1 1/16 socket or wrench, catch the oil, a little will come out, put the new Boondockers tensioner in and snug it up with the supplied gasket. You will need a open end wrench for this. One in pull the pin and release the tensioner. Once that is done there is a 10mm bolt and gasket that is put on. You are shown with the install.

Now pull the clutch cover and rotate the primary clutch COUNTER-CLOCKWISE 10 or so revolutions. This is done to make sure the motor isn’t binding. Once that’s done, reinstall the clutch cover and start it up. You will now enjoy no more rattling. Motor is much more quite now.