I have had several 125s but years ago. I now have VPIs with outboard motors, I know when one of them is too tight, the motor won't turn. As long as there is some play in the belt when you attempt to stretch it when it is in place I would think you are all right. Is the table functioning properly when you use it? How does it start up? Is there a specific reason you would think it might be too tight? Have you looked on Vinyl Engine to see if they give the diameter of the 125 belt?
