Can I run this piston?

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5/10/2018 10:13 PM

Is there supposed to be a bit of resistance? Is it warped? Is the pin worn out? Can I run it without damaging the cylinder?

https://streamable.com/mll5b

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5/10/2018 10:17 PM

No.

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James

5/10/2018 10:25 PM

No way would I run that... somethings up for sure!

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Don’t piss off the old people - the older they get the less “life in prison” is a deterrent for them!

2020.5 KTM 450 SXF FE
2006 KX250

5/10/2018 10:43 PM

Peace of mind with a new piston and rings.

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There's something happening here, what it is ain't exactly clear.

5/10/2018 10:48 PM

Its a two stroke.. What does a top end cost? Go recycle some cans.

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5/10/2018 10:56 PM
Edited Date/Time: 5/10/2018 11:00 PM

bvm111 wrote:

No way would I run that... somethings up for sure!

Any guesses on what? .. I forgot to mention that the mechanic said the cylinder had a "little belly" .. but nothing serious. it was like 0.001, 0.001, 0.003.. the PO didnt know how to mix gas,either, and it was running super lean. There were some slight seize marks on the side of the piston, and very very minor blow-back. The ring still moves freely; didnt have a gauge to measure the wear, tho. It only sticks slightly in the middle of each up/down stroke. So could the small cylinder belly be the culprit? If that's the case then even when my new piston comes I'll have the same issue. Is that much resistance really that big of a deal? Other than wearing out your crankshaft bearings? .. if so - why?

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5/10/2018 10:57 PM

dirtmike86 wrote:

Its a two stroke.. What does a top end cost? Go recycle some cans.

It's not money; it's time.

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