Polini 133cc install

[darrenc]

My 133 was on another engine, it broke, so its apart waiting for the courage to rebuild.  And money.

So I'll install it on my other engine, however I want to make sure i'm doing it right with all the best tips.  No one wants a seize or fucking catastrophe on the road.


1.  I might need to take the studs off the old engine and put them on the receiving engine.
2.  Remove old Piston and parts and replace with the polini ones.
3.  Metal gasket (courtesy of a nice chap in the UK that just said "I got one mate, i'll send it to ya".  Thanks smallframe brother). And then the cylinder.
4.  Some of that high temp fluid gasket between the cylinder head and cylinder.
5.  Torque down to specs.

And I'll need to look up the torque values and where to adjust the stator for it.

What am I missing, and what could I do to increase my luck.

Cheers.

[jeanshorts]

Do not reuse piston circlips. Keep the circlip open ends oriented towards the bottom of piston. lap the head and top of cylinder on some fine grit wet/dry sand paper that has been taped down to a thick sheet of glass. Chamfer ports if not done already.

[jonnysnatchsniffer]

you also need to check the squish with some solder and try to get it at 1mm and no more than 1.2, you may find that you dont use a base gasket to get this measurement but thats ok, just use decent sealant
also chamfer the port edges to help the rings as the cast poliny has sharp port edges
if you are going to get a new piston dont buy the polini one, get the gran sport one with the thin wire rings, they do them in 2 compression heights so get the one that matches the standard piston which is 39mm, the other piston has a shorter compression height