17-10-19, 08:18 AM
Mileage 40K. I cannot say that it has had the best of maintenance, but has been garaged. Trouble started after a period of not using again suggesting carbs being the problem.
I have replaced the float valve and rubbers. Not checked the petrol level though.
I have had the carbs of 3 times and cleaned out all the varnish. Jets cleaned so you can see daylight through them. Transfer ports blown through.
Any comment on my concern about the bike shops claim that i need new piston rings? The intermittent nature of this problem with it running perfectly sometimes suggests to me that, along with my compression test, compression is not the problem. Just checked the book last night and all cylinders are within range albeit that 3 is more than 10% down.
My thinking on the carb piston was that it opens the main jet. if it sticks open, then surely there would be too much fuel getting through on idle.