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Post by snakeplissken on May 15, 2018 7:39:18 GMT -5
I bought an oversize Polini piston (47.4mm) a while back. I had my Polini sport 70cc bored but the person who did it made it to big. I only ran the piston in that head for about 10 min til i checked the compression and seen it wasn't enough. I now got another cylinder head bored out. My question is can i run the piston with the same rings in the new cylinder head? Remember i only ran the piston for about 10 min. To me i feel it will be fine. What do you think
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Post by jackrides on May 15, 2018 8:37:02 GMT -5
The piston goes up and down in the cylinder. The head is where the valves are and is on top. What is the piston to cylinder clearance measured in several places?
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Post by jdl357 on May 15, 2018 8:57:00 GMT -5
Just FYI, there are no valves in 2 strokes.
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Post by jackrides on May 15, 2018 9:43:33 GMT -5
Polinis are all 2 st?
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Post by ThomasTPFL on May 15, 2018 9:53:49 GMT -5
Assuming everything fits, run it.
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Post by snakeplissken on May 15, 2018 10:34:18 GMT -5
I think I'm going to run it. Right now i have a 105 main jet. Anyone think i should go one up?
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Post by jdl357 on May 15, 2018 18:36:58 GMT -5
No, there are 2t and 4t Polinis if course, just saying that because this thread is about 2 stroke troubleshooting.
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