No, you are cool, the gripes have a different inner diameter. As you noticed the throttle grip is larger. Additionally, the throttle sleeve has raised strips and rings which mate to the stock grip for a secure fit. I had to grind the rings off to correctly fit the Pro-GripI was looking at how the throttle side grip was put on and it appears to be shaped and tabbed to index on the throttle barrel which has some raised rings and grooves. In english, I dont think the left and right grips are the same. Do I have my head up my a$$ or has anyone else noticed this?