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Author Topic: piston sizes  (Read 1692 times)

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Offline slammedbus

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piston sizes
« on: February 20, 2015, 07:01:27 PM »
So my son ripped his motor apart today. We see the Pistons are stamped std. But I measure a diameter of 90mm...... how does this make sense?  Used two different sets of calipers.
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Offline 70's Looker

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Re: piston sizes
« Reply #1 on: February 20, 2015, 07:44:12 PM »
Aluminum cylinders? There were 90s but rather uncommon to have survived this long...
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Offline slammedbus

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Re: piston sizes
« Reply #2 on: February 20, 2015, 07:55:49 PM »
No sir. Not aluminum
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Offline 52 split

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Re: piston sizes
« Reply #3 on: February 20, 2015, 11:37:44 PM »
what size is stamped on the piston. some one just put a 1756cc motor together my guess. NPR had 90mm at one time.
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Offline slammedbus

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Re: piston sizes
« Reply #4 on: February 21, 2015, 08:47:31 AM »
That's just it. No size stamp.....
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Offline slammedbus

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Re: piston sizes
« Reply #5 on: February 21, 2015, 02:27:42 PM »
Bah! Old eyes. Took the eleven year old to see the 90.45 stamp
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