The first thing you have to do is soften all the sharp edges in the cylinder.
How to chamfer the ports on a 2 stroke Vespa cylinder **WARNING** contains strong language....Next is to set the end gap on the rings. I set the top ring to .002", and the bottom to .0035 - .004
Third is to set the squish. .005 - .010".
Order a couple BR9HSA plugs from Jiangwayne.com They are one step colder, and really help.
A malossi red contra w/ the malossi torsion controller, and 5-6 gram malossi or polinni rollers.
The best pipe I have found is the Scorpion (small one). Scooter alley in Hawaii., 24mm Oko flatslide carb, and the Stage 6 MK II clutch, and vented bell.
Since you are taking it all down to do the work a new set of crank seals will be a bonus. Any tiny leak effects the jetting, and you will have a constant battle unless you have new seals.
Hope some of this helps ya.
Forgot... Drill a pair of oil holes in the wrist pin bosses (piston), shave the skirts lower edge to 60*. That forces oil up between the piston/Cylinder wall on the down stroke.
You can also sand/polish the piston dome to prevent carbon build up. Top quality oil helps here too.
I use Golden Spectro 32 platinum.
