Now its time to start taking the carbs apart:
Hmm, just as expected the bowls were filled with lotsa reddish stuff, and it looked like it was way back since they had been cleaned... if they ever had:
Before cleaning can start, be sure to get rid of all traces of gaskets, and remove the all pilot jets, air screws, idling screws (take care not to loosen the springs and washers) and last but not least, remove the main jet tube, by unscrewing the main jet and removing the special washer btw. Main jet and Needle jet. The Needle jet can be tricky to remove, but tap on it lightly using a mandrel of as large a size as possible.
Don't get too alarmed by the look of the Needle jet, after it has been removed, you will probably want to replace it anyway together with the Needle. (More on this topic later)
It might be a good idea, to write down each individual carbs settings while going along...
Before just sinking each carb into my ultrasonic cleaner, they are allowed a nice long bath in diesel oil:
... each carb have now been completely dismantled, and care is taken not to mix up the individual parts.
After a couple of weeks much of the dirt an "gum" have loosened. After a brief cleaning, I can pour them into my ultrasonic cleaner - one at a time. But first some words of caution:
Carburettors are made of some light alloy, and all the small drillings, holes and vents are delicate stuff. This is why
- I note / write down / take picture of all the small brass plugs in each carb. They are know to work loose during cleaning, so be
very careful when you remove the carbs after
cleaning, and use a filter when draining used water from the cleaner.
- I pour them into diesel oil first, to avoid having them in the ultrasonic cleaner for too long
- I dont use anything like strong detergents. I've heard of someone using dishwasher soap
This is very agressive to light alloy, so I advise that you don't.
- I use hot water with only some
mild soap added, or you can add a small amount of the the type of cleaner, that painters use to clean the wooden parts before sanding/painting.
I applied about 85% power (max power = 240 W) for 20 mins in my cleaner. It can easily hold two carbs at a time (capacity 10 Litres), but again, avoid to mix up the parts, so I did 3 runs.
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but better safe than sorry.
) inside the the Needle jet.
) That paint job is better than anything the factory did, it WAS 1970, after all, but this is a special kind of re-build. I feel like throwing all my H2 stuff back into the corner of the Garage!! Great thread! 