My 2010 V7 Cafe with a big-bore kit has been consuming oil on trailing throttle for some time now. This is a classic symptom of worn valve guide seals, which seems premature as this bike has less than 9,000 miles on the clock. However, I pulled the valve cover hoping I could remove the valve springs with the head in-situ to access the valve seals, but I didn't have a valve spring compressor small enough to fit the valve train area.
So off came the cylinder head. A quick inspection of the head gasket suggested that the oil leak path was not the valve stem seals after all, but a ~5/16" area on the lower portion of the head gasket; see pic.
Question: Does the big-bore kit (820cc I think, I was not the installer) require a special head gasket, or will the OEM gasket work?
Thanks!
Jason
So off came the cylinder head. A quick inspection of the head gasket suggested that the oil leak path was not the valve stem seals after all, but a ~5/16" area on the lower portion of the head gasket; see pic.
Question: Does the big-bore kit (820cc I think, I was not the installer) require a special head gasket, or will the OEM gasket work?
Thanks!
Jason