15-06-2019, 08:35 AM
I had a similar problem with my Ruby and the problem was the small jet underneath the body of the carb hidden from view by a brass screw. Care should be taken if removing it as it is easily damaged. I cleaned mine whilst it was still in the carb after removing the brass screw with a can of pressurised carburettor cleaner. The purpose of this jet which comes out in the Ventura tube is to allow air to bypass the throttle butterfly when closed thus allowing tick over.
John Mason
John Mason
Would you believe it "Her who must be obeyed" refers to my Ruby as the toy.