Used TB 143 cylinder with an old style, new, TB piston
It has with marks on the inside cylinder walls. I ran the wrong piston on my motor for an hour or so and the valves were hitting the top of the piston. May or may not beable to be cleaned up with a cylinder hone.
$50shipped Priority
New TB 143 cylinder
The top of the cylinder wall is chipped in a couple places. I checked with my motor/old cylinder and the top of the piston would come up to the bottom of the chip. That's using a 55mm stroker crank.
I'm guessing you could get it bored out to run a 150 piston and you would be set. Post up if this is correct or incorrect.