I am still having the small oil burning issue on the 550. It has close to 11000 miles now and around 300 miles of riding it will use about 4 ounces. Compression this morning was 110 on a warm to the touch motor. Not enough oil to worry do a top end yet and I also switched to a 5W50 to see if it will help. My plug is a medium tan but the ring around it is really black. What causes the ring around it to be black. The tan is good from what I read but do not understand all the black on the ring around the plug. If looking down at the plug the ring I am talking about would be the bottom part of the threads.
I am still having the small oil burning issue on the 550. It has close to 11000 miles now and around 300 miles of riding it will use about 4 ounces. Compression this morning was 110 on a warm to the touch motor. Not enough oil to worry do a top end yet and I also switched to a 5W50 to see if it will help. My plug is a medium tan but the ring around it is really black. What causes the ring around it to be black. The tan is good from what I read but do not understand all the black on the ring around the plug. If looking down at the plug the ring I am talking about would be the bottom part of the threads.
