It was noted that a visible crack had appeared between the chrome silencer section of the exhaust and the chrome-plated thin steel part that followed the joining pipe. However, no exhaust gases were blowing from this crack. It was surmised that the crack was probably filled with nothing more than corrosion, that the exhaust was structurally sound but that a large hole would appear if the crack were not addressed.
It was therefore decided to repair the crack with Milliput, as a permanent repair. Previous experience with this product led to the decision to make a continuous Milliput band around the pipe, that was larger than the crack itself, to prevent the repair breaking loose. This was then painted in matt black paint.
It was also decided to check the valve clearances again, as it had been over 2000 miles since the valves had all been shimmed. The following readings were obtained:
Inlet 1: 0.15-0.16
Exhaust 1: 0.24
Inlet 2: 0.12
Exhaust 2: 0.22-0.23
Inlet 3: 0.12
Exhaust 3: 0.22
Inlet 4: 0.1-0.11
Exhaust 4: 0.25
All of the clearances are satisfactory, and the bike shall continue to be used normally. It was noted that the shim on inlet 4 would need replacement, probably within the next 4000 miles. A 275 shim has been ordered, and will be inserted at the next oil and oil filter replacement.