Took my st for a ride

Thought I'd take my st for a ride today as it is now fully legal for the the road but it wouldn't start after not being used for probably a year and a half, the petrol was a nasty smell so I drained it out and put some fresh petrol and cleaned the spark plug, it wouldn't start at first but when the rotten petrol had passed through the carb in sprang into action and I took it for a 3 Mile trip and it always seems to gives me a smile from ear to ear when riding it