There are several ways to make sure that your Harley would run smoothly as you drive in the road. The best thing, however, to do to your motorcycle is to make sure that you take care of muffler. Truth is, a Harley Davidson engine is not really the best thing out there. You need to tweak it a bit to make sure that you get the best running engine. That crossover pipe on your Harley is intended to help out in balancing the exhaust stream between heads and improve performance; however, the preventive nature of the factory exhaust squeezes the life of the engine. Buying extra harley davidson accessories could help but make sure that you know what you are buying and only from those who also know what a Harley really is. You should also try to replace the factory air filter with a high volume filter to make sure that the engine would run better and be able to burn fuel more efficiently. Keep in mind that while Harley may aesthetically be one of the best bikes around, it does not mean that they offer the perfect quality. It would definitely take the biker in you to get it running perfectly.