What the heck am I doing wrong? I've installed a billet throttle tube and when I try to slip on a grip, the end splits open. I've even punched a tiny hole in the end of the grip to releive the trapped air but it still splits as I reach the very end of snugging the grip up against the end of the tube. This was never a problem with the stock tube. It appears to me that the billet tube is a bit larger on the diameter than the stock plastic tube and soft compound Renthals can't handle this added stretch. Is there a solution? Are there grips designed for the larger billet tubes?