Dismantling, cleaning the engine/points of a Cady

(from the Brooder)

This is the Cady engine. As you can see, some genius decided to put the 
intake right next to the engine

To get inside, use a strap wrench on the magneto and a ratchet on the nut. 
The nut is threaded the normal way.

Now, to get the Dimoby clutch off, you'll probably need a three jaw puller. I had 
one engine where it came right off, but it didn't idle so that's no good. I 
called Canadian Tire and they said they had them for sale or also "rent a tool" but 
I ended up finding a three jaw puller in my dad's truck so they're not too hard to 
find.

Put the end of the long screw where the nut used to be and put the ends of 
the jaws under the Dimoby, crank the nut at the top and it will pull up with every 
turn.

Use a fine grit sandpaper and clean up all the surfaces inside the clutch 
and the disc and spray it all out with carb cleaner and/or contact cleaner, 
including the springs and pivot points

Use an adjustable or whatever your favorite tool is to take off the nut and washer on the front of the magneto

Clean out the inside of the magneto use very fine grit sandpaper in-between the points gap to make sure they're 
nice and clean, and spray it all out again with contact cleaner.

This is how I do the timing. 
There's three circles on the cam. Two are for the magneto cover to grab onto and the third
(and smallest one) I use to set the timing. There's a little post that lines up with the
axis of the piston. when the smallest circle is getting close to it (turning the cam by
hand) the points should start opening and when the smallest circle is just about to align
with the post, the points should be wide open (about .014mm) 
 

If the gap isn't opening enough or not at the right time you can adjust it by loosening the
screw above that post I was talking about. Then you loosen or tighten a little set screw that is almost under the points.
Play with it, you'll see how it works. The  gap might change when you tighten that first screw back up, so just be weary of that, it may take a few tries.

The piston should be about 1mm from TDC when the points open, and TDC when they are
wide open.