stuttering fzs 600

[red98]

i`ve been thinking  :eek .......setting the mixture by counting the number of turns on the mixture screws seams to be a bit hit or miss to me,could do a plug check which would be a bit long winded  :\  and then i remembered i have a colour tune somewhere    it takes the place of a spark plug and is see through to aid accurate setting of the mixture    will see if i can find it tonight 

anyone else used one of these