1: To clean the jet block requires removal, but it’s fairly delicate – driving it out can distort the structure. Pressing is a safer option, but the base of the carb offers little support...
![STEP 2](https://images.bauerhosting.com/legacy/media/6047/6abb/1852/5a0d/da99/b9fc/Step+2.jpg?auto=format&w=1440&q=80)
2: I made up an aluminium ring with the correct diameter and 26tpi thread to screw onto the threads on the bottom of the mixing chamber, for the bottom nut.
![STEP 3](https://images.bauerhosting.com/legacy/media/6047/6aed/5145/9d86/4b54/0559/Step+3.jpg?auto=format&w=1440&q=80)
3: That gives plenty of support to put the carb body into the arbour press and, using a piece of aluminium bar down the middle, press out the jet block without excess force.
![STEP 4](https://images.bauerhosting.com/legacy/media/6047/6afe/8d76/b354/ca42/a7b5/Step+4.jpg?auto=format&w=1440&q=80)
4: There we are – although it was quite corroded, the ring has made it possible to press it out controllably instead of battering away and causing (probably irreversible) damage.