Made a few experiment last night. Not too succesfull, plenty of room for improvement. A proper cleaning agent for instance. Was using fairy liquid. Also need a baske - not good enough just lying in the tub like this.
Carb float bowl before sonich bath
and carb piston
Two hours later, not impressive, but OK. Saved me a lot of work.
This is because piston was standing and not rotated once in a while. Needs another go - perhaps suspended with a piece of string
Bit more luck with the float bowls
Water got plenty dirty though
