Also known as the Mix-Mizer. Got mine from K-Mart. Makes gear box changes really easy. Has cc's on it. Not sure about the People 50 but most smaller scoots use around 110cc's. Also most use either gear oil (summer) or 10-30 (winter). I had gear oil in my old Buddy 125 and one supper cold night the scoot felt like the rear brake was on from the gear oil getting to cold. Switched to 10-30 during winter and its much better. Check the owners manual to be sure.