The continuing saga of the main seal.
Transmission removed today. Removed 7 screws holding transmission to engine. It wouldn't budge. I used a plastic mallet to loosen the unit but I had to whack it far harder than I liked. The problem was a rusty locating dowel. I'll clean that up and copper grease it before re-assembly.
Two of the fixing screws were coated in fresh transmission fluid. The input shaft seal has a substantial leak. See photo.
I experienced no clutch slip so no fluid found its way onto the clutch.
The rubber O ring was in good condition and still flexible. The engine main seal shows no signs of leaking however the telltale sign of oil staining between the intermediate housing and engine is there. It was this that alerted me to the seal leak in the first place. I do not feel the transmission fluid is responsible for the staining in this location but I am sure it caused the staining at the transmission /bellhousing join. I'll replace the seal as a precaution.
I have been deliberately keeping the engine oil on the low side which seems to have prevented further leaking.
The photo shows oil running from the main shaft. This has only occurred because of removal of the clutch housing and oil seal ring and the fact that the engine is tilted downwards towards the rear.
The clutch friction plate is nearly down to the rivets at 20,000 miles so I'll replace that. I feel this is down to riding technique and not an inherent fault with the clutch.
So its time to order my spares to include clutch plate, main and transmission seals and slave cylinder.
I'll provide another update in a week or two.