i have a super tiger 55 ringed engine thats not even a year old ....
Your thread got intercepted and is over the hill concerning topic.
If you have a ST 55, you have a rare jewel. There were .56s at one time but a .55 is definitely over a year old. I don't remember one since my first ST back around 1961. [8D]
Clean it up. Sounds like a dirty carb. A small foreign object inside the NV area can be a real torment unless you take the carb apart and wash throughly in alcohol.