Well I've never seen one tiger, but as they say "Fortune favours the brave" Take the bar and the handle off and see what you can see. Give it a good degrease and clean... Ya gotta start somewhere!
It probably could do with a carby kit and a general de-coke etc. You might want to give it the full rebuild rings and seals and the like. It could be a bit of fun, I hope you have not stripped or cross threaded the plug hole.... might have to take it in to a repair shop and get a "helli coil" / tread repair kit put in.
