Aftermarket carb & Boot

Check out a cr125 boot. Can be used for 33mm to 38mm. Thats what im using. Bolts right up. Anything smaller than a 33mm just sumerge the boot in a bowl of water and put it in the microwave until it boils. Then be careful and pore out the hot water. Then grab the boot with a thick towel. While gripping the boot push the bigger carb into the opening and it will stretch to fit easily.