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Author Topic: piston ring end-gap oversized cylinder  (Read 2320 times)

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Offline Bobby Phillips

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piston ring end-gap oversized cylinder
« on: May 24, 2015, 06:07:13 PM »
I have an 03 KX125 that I have a new oversize (56mm) cylinder going on it with a Wiseco piston. Proper ring end-gap is my concern. For the stock bore diameter the end gap specs are 0.35 -0.55mm. What I am wondering is,since my new cylinder is 2mm oversize, would I need to adjust my rings end-gap for any reason? I can`t put my finger on the reason its bothering me,it seems like it should be the same but I might not know something I should. Anybody?
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Offline Flattracker

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Re: piston ring end-gap oversized cylinder
« Reply #1 on: May 28, 2015, 02:03:58 PM »
The replacement piston should have ring end gap specified. You could probably get your answer from contacting the piston manufacturer. Are you replacing the cylinder or is a cast iron liner being installed?
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Motorrad

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Re: piston ring end-gap oversized cylinder
« Reply #2 on: May 28, 2015, 02:45:37 PM »
What brand piston.  They should give you an equation for what gap to run to bore ratio
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