30mm Carburetor with Hand Choke Lever PZ30 Carb for 200cc 250cc ATV Dirt Bike Go Kart
[331-999008]

It arrived quickly, bolts on easily, and just works. Make sure you get the right one. Briggs listed two for my motor. One with a choke and one with a primer.

If your time is worth anything, it is cheaper to replace the carb than to rebuild it.

I would recommend this product.