G'day folks,
Beantin, if you've replaced the carby diaphragm [if any - small Vacu-Jets didn't have one] along with the gaskets, it's probably working as well as it's going to. The only common problem with these fuel pick-ups is the screen getting clogged.
These are a pump type carby of sorts, but the pump has to lift the fuel from the bottom of the tank in a single stage, unlike the Pulsa-Jet. So it can take a few pulls just to get the fuel up to the carby.
Aside from the valve clearances, check that the choke is operating correctly. With the throttle control in the full choke position, see if you can pull the choke slide out any further. If you can, it needs to be adjusted, by careful bending of the link wire.
