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The 2 oddballs don't look like top rings at all.

Source?

In my understanding, the "gentle start" is to seat bearings and the other components. Then you have to get on it before you glaze the walls and while you still have a cutting edge on the rings. For the rings, its better to get it going right off, as long as you have oil flowing and the oil is...

Just saw your piston post in the parts wanted section. Everything ok?

I'm sorry, I was talking out the side of my neck this morning before I had my coffee. You are quite right. Only when engine braking I guess, which isn't good for a 2 stroke anyway.

Jumping in late here: Unless you are speaking strictly of 2stroke diesels, saying that 2 stroke rods don't experience tensile stress is ridiculous. They literally suck the intake charge past the reeds, which would have greater pumping loss than a 4 stroke's valve. And they still have to...

Sorry, I've lost track of the first half of this thread.

This brings up a good point. What's the difference in weight between the new pistons and old pistons?

Just peer pressure him into doing a few brake stands. (Or attempting anyway) should make for a good "hold my beer and watch THIS" moment. be sure to get it on film.

The final stage of any rebuild is to drive it like you stole it. Run it hard, just don't put it away wet.

Can't argue with that.

What valve work has been done?

Agreed.

Every point you touched on here agrees with everything I've been told or come to learn on my own. Modern engines require less break-in because the cylinders, pistons, and rings are all manufactured more uniformly. This reduces the need for cross-hatching to break the rings in. That's what its...

In the grass, mine will idle the wheels around too, but you don't want to idle on engine through breakin.

Find a really big tree Put it in 6-Lo Pull up, bumper to the tree Use the hand throttle and dig 6 nice holes Come back after a coffee break and see what broke.

Well that seems to answer the 2dots on top question.

https://www.highpowermedia.com/blog/3954/rotation-of-piston-rings Interesting. I guess that's why in 2 stroke power sports motors, there is a dowel pin to keep the rings properly clocked.

(Rusty, I know you know this, but just to clarify) The taper that matters on the 2nd ring is the angle of the face that meets the cylinder wall. It has to go /| |\ so that it drags the oil away from the combustion chamber. Judging by the wear marks on Wild's 2nd ring, they were installed that...

The second ring is going to see more oil even with wash down.