After its winter test and having had a service, I noticed my bike needed cranking over a lot before starting. An embarrassing amount of cranking actually. I changed the plugs (even though they’d only done 1000 miles and were Irridium) and it seemed to solve it. But a 100 miles or so later and the reluctance seemed to return. Any ideas folks? The bike is a 2018 mk11 euro 4.