Quote Originally Posted by 69zeff65 View Post
Or slow speed jets are usually what causes these bikes to act like that. I cleaned the ones in Ole Grey a bunch of times until I found a source for None-Ethanol gas.
Although they tell you not to I found the most effective way to clean the idle jets is to take a single strand of stainless brake cable and run it through the passage, a simple shot of carb cleaner in the carb body passage works for them.
I did the same thing with my R69S carbs. After experiencing it for the first time, I made sure I ran Lucas gas treatment in the tank.

I also had the pinging issue and my problem was because the manual timing advance lever had worked itself loose and was allowing the timing to move at will.

Those are great bikes. I was lucky to have Clanton Austell to help me out. I am glad you have found someone who is good with these bikes. BTW, mine had over 300,000 miles on it when I sold it and it was still a strong runner.