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Author Topic: Enlarged exhaust ports  (Read 2499 times)

pd

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Re: Enlarged exhaust ports
« Reply #15 on: November 17, 2020, 12:44:32 PM »
Quote from: Milt36 on November 17, 2020, 09:00:19 AM
You're a great craftsman, Pete.  Very nice indeed!!

Thank you Milt .
Just making sure a ring doesn't snag a port . ;)

Pete . :)

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Ricks

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Re: Enlarged exhaust ports
« Reply #16 on: November 17, 2020, 02:16:49 PM »
Nice job Pete. I have built 6 model M motors in the last 10 years and not once have I had an issue with a ring hanging up in the ports. I’m skeptical about how pervasive this problem can be.  I’ve ridden trust rusty many miles over the last 10 years and it always fires up in 1 or 2 kicks.  Is there a downside to pinning the rings? Uneven wear or anything like that?
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Rick

pd

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Re: Enlarged exhaust ports
« Reply #17 on: November 17, 2020, 02:41:35 PM »
Rick ,

 I pinned the rings more as preventive maintenance .
I've seen too many 2 stroke rings catch a port and ruin the top ends .
Better safe ...

As for any abnormal wear or any downside ,  none that I've ever seen .
As far as I know , most , if not all , modern 2 stroke motors use pinned rings .
There is even a patent on a self aligning ring . Below is an illustration of that .

Pete . :)
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