i have completed restoration on a wizard wg4 6 hp. i have everything ready to put back together but ran into the problem of getting the cylinder caps back on over the pistons. i can see where the piston rings have to be positioned but cannot find a way to get the rings compressed in order to slide the caps back on. do i need a special tool, or is there an easy way that i am overlooking?

Try using your fingernails when pushing the jugs over the piston at the same time. This has worked for me, those special tools are a pain in the you know what!

Look for something like this one:
http://www.ebay.com/itm/Motorcycle-piston-ring-tool-installation-compressor-/200672297561?pt=UK_Motorcycle_Parts&hash=item2eb9004259

I used a hose clamp when I re ringed my wizard.(if I couldn't compress by hand).

make sure they(piston rings) are indexed correctly with the tabs,If that applies to your motor.

Usually you can press rings in with fingers...not always...I had a super max PITA KE4 powerhead
that just would not cooperate...looked in Bailey's
chain saw on line catalog and found a set of plastic
ring squeezers for a reasonable $7.95 or some such
plus $8.95 S & H (OUCH!!!) Arrived in due course
and worked where nothing else I tried could...
Nice tool(s) that work as advertised but oh that
S & H. (I had worked over several days trying to
make up something but this was the motor from
that warm place.
Louis

Small soup or condensed milk cans - cut strips wide enough to cover the rings and squeeze ends with vise grips or pliars. Oil well first. JW in Dixie

A big plastic zip tie works good too!

I think you should refer a dame device. Just notice that how the piston rings are position on the cylinder & just try to imitate it..

alliance plastic | clamping knob