You love your Harley-Davidson Sportster, but you just know you could coax a little bit more power out of that engine. The best way to do that without changing out a lot of different parts is to find a Sportster big bore kit. These kits have everything that you need to replace the stock pistons that came with your Sportster with larger bore pistons. You do need to bore out the cylinder a small amount to make way for the new pistons, but it is worth it. The new pistons displace more fluid, which means that they send more power through the engine. With your Harley big bore kit, you have all the gaskets and other smaller pieces that you need to coax as much power as possible out of that Sportster. Once you get your Sportster big bore kit and change everything out, you are going to be amazed at how great everything runs. And with the vast inventory on eBay, you can find what you need in a fraction of the time you thought possible.Shop the extensive inventory of motorcycle parts and motorcycle accessories!