I bought a belt thinking that a 1600mm 50mm 8mm cog belt would work. it goes on the pullies without the tensioner but it is piano wire tight. I know the next size is a 1696mm and will be to big. what belt size is out there that will hold up and the correct length? this is an F1r 5.00 step up ratio with 88t crank and 46t blower. I really don't want to change pullies.