Re: How to rebuild and balance these engines
I would say stay way from any "racing carbs" unless you are racing....learn to tune the stock one, and try the stock carb mod as outlined by Igor on this website. Also, before you shell out 50-70 dollars or more for one, and STILL have to tune it for it to work properly, consider the alternatives available on ebay for a few dollars, like a Mikuni, Del'Orto, or ect. from a small dirt bike.
Damp Pro?!? How about .25 cents worth of caulking or silicone, works the same way and doesn't cost an arm and a leg.