I have a 1977 R60/7 that I hope someone can help me with.
The bike has electronic ignition.
I was having a problem with it idling. It would stall out when you came to a stop.
It needed a lot choke to start.
Compression was tested and the compression is at factory specs for both cylinders.
I replaced the spark plugs and the carbs were cleaned and balanced
The valves adjusted to factory specs.
Play was checked in the choke lines and the accelerator lines.
The previous owner had set the carburetor needle to the second notch and I restored it to the first notch which is the factory specs.
The idle was set around 1200 rpm which seemed to be a fine. It idled very nicely after all the adjustments were made.
I normally fuel with standard premium gas at 91 octane ( Shell ), but occasionally I find a station with 93 and will take the higher octane if available.
It starts easily now, but I notice now that it does not always return to idle quickly when you come to a stop.
If you are on the highway and running around 5000 rpm, when you come to a stop, the idle may only drop to around 3000 rpm.
It seems to be an intermittent problem.
After a while, it may drop down to the 1200 rpm idle speed and the net time I stop, the idle may drop quickly to 2000 or to 1200. It seems unpredictable.
It is almost as if something is sticking in the carburetor.
Any suggestions as to what the problem and fix might be would be appreciated.