I just wanted to post a note about a spark plug I found and really liked... My Cannondale E440 calls for an NGK CR8EK. My dealer turned me on to the NGK "Ridium CR8EIX" I really like the improved performance of it, bike really smooth and power delivery was a notch better. When you compare the two plugs side by side you will see a major difference in the electrode and it overall design. Just wanted to pass on some info. Thump on!!!