piaggio ciao 1972 decompression

Me and my friend got bored one day and stripped a 1972 ciao engine. We couldn't get the flywheel off so we got my mates brother to make a puller. this took a while. My friend managed to take off the cylinder head and has now forgotten how to reinstate the decompression cable. Any pictures for this would be very useful.

Re: piaggio ciao 1972 decompression

On the Ciao, there is this little two-pronged fork that attaches to the cylinder head underneath the decompression lever. The cable stop is held by it. The outer cable housing then rides against the lever. That way, when the decompression cable is pulled, the lever is pushed down by the outer cable housing.

Chris

Re: piaggio ciao 1972 decompression

this is how i felt it should work but it seems to be missing some kind of pivot. Does the lever pivot anywhere? does the two forked prong locate on to the cylinder head bolts? There seems to be some wear half way down the pin implying that it does pivot. a diagram or photo of some description would be very useful. The only reason we took it apart was because it would only run for about five minutes and then cut out. There was lots of stuff in the fuel tank so we emptied that. We have installed an extra fuel filter in the fuel pipe to filter out the bigger stuff. The clutch is also engaging slightly when the bike is stationary. Could this be due to worn parts in the clutch?

Re: piaggio ciao 1972 decompression

The little "fork" attaches to one of the bolts that secures the cylinder head. The five minute run time most likely is due to fuel system clogs. I'd start there. It could also be due to other things (such as the coil, the condenser, the points, the spark plug, the plug wire). I'll see what I can do about coming up with a photo, but I don't have a digital camera (Miguel, I know you're still waiting on a pic). The decompression lever (the one on the cylinder head) is a piece of spring steel which is attached under the cylinder bolt. I've created a rough drawing of what the lever looks like and attached it.

Chris

Ciaodecomp.jpg

Re: piaggio ciao 1972 decompression

try adjusting the carb to a slower idle for the grabbing clutch or maybe it is in the clutch itself.Did you look inside the clutch, it's very simple. glad to hear of another 72 ciao bruce

« Go to Topic — end of thread

Want to post in this forum? We'd love to have you join the discussion, but first:

Login or Create Account