MOPED ARMY

Well I would be a complete dumbass if I did that but I will not rule it out until I have confirmed. I've had the cylinder off a couple times but did not check for that. Stand by.

And idling for 10min is stupid.

It tells you nothing about how a bike is running.

Oh Jesus help him Jesus

That's 109% wrong.

Idle to warm up then ride it. Ride it hard. That's how ya do it.

Idling 10min won't do shit, except maybe glaze your bore.

Wait, is this new rings in an old cast iron cyl?

If so, did you hone the bore?

Either with a ball hone or sandpaper?

You gotta do that on cast iron bores to break the varnish or the rings won't seat and you'll have shitty compression

Edumicate me here- isn't a windowed piston for piston port engines, not a reed valve engine (QT) ? seems like it would totally change suction/intake flow/exhaust flow. ??? Unless you put a matching cylinder for piston port engine. ?? !!

You got it backwards!

Piston port equals no window just a small hole or a few small holes if it has boost ports, Read valve equals window in piston most times,

Now sometimes like the 50cc puch Athena reed kit the piston doesn’t have a window in it just has a few holes cause they send it with wrong piston but it should have a window and a puch Gila has two big holes in piston which you could connect into a window as would be fine,

Stock tomos a35 reed cylinders have two long windows most times

I know there’s some scooter kits that the only difference between the “sport” and “race” versions are the pistons. One of the Airsal variants uses the same cylinder, but the “sport” version has no window and I think a different wrist pin height.

Race piston with Sunroof

keen to know how this turns out when you get it going and pics of the window!

ok windowed piston installed in different qt. Working well. I need to up-jet just a bit more and maybe take a look at how the piston sits at BDC to see if any cylinder changes need to be made.