Hi I have a supertigre .61 - it runs good at full throttle, but a few seconds after iddle it dies. I think there is a leak of air in the carbutor low end needle or high end needle.

can anyone recommend a good carb for this engine? or a good place where I can buy the rubber gaskets that go on both the high end and low end needle. I am pretty sure that if I replace these two rubber orings, I can fix the problem.