I had a nail in my rear tire on my GSXR, pulled it out at home and the tire was flat within 10 minutes. Cycle Gear sold me a tire plug kit, but it didn't work very well. The tire would leak out over a 5 day period, so the few rides I took were shorter than usual. It was the perfect excuse to get new tires front and rear since they were worn anyway. Replace yours if it can't be fixed at a shop, but go with the same tire, unless you want to change the front a$ well. They should match for best performance. Don't mix bias ply with radial, either.