So I spent hours trying to remove the carbs (which was a task in itself for me) and try to open up and clean the parts (the best I could think of) putting things back together was harder than I thought, but now the bike won't start. I must have made mistake somewhere when putting things together. The electrical seems okay as starter cranks, but it won't start at all
I don't think I have time or skills to fix this, so I'm gonna have to get a mechanic to come over and have a look. At least it was a good learning curve and an experience for future. Let's see what the mechanic says...