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can you ID these HC Pistons??

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malmojoe

can you ID these HC Pistons??

#1 PostAuthor: malmojoe » Fri May 11, 2012 3:48 pm

Hi all, does anyone know what make these are? Not sure of the dia, but they have 030 stamped on them. Is that 3mm over or 0.3mm?


cheers

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z1000puddin
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#2 PostAuthor: z1000puddin » Fri May 11, 2012 4:30 pm

Is there no markings inside the piston on the under side of the crown ?

stu
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zed1015
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#3 PostAuthor: zed1015 » Fri May 11, 2012 5:08 pm

Out of a Z900 ?
If they are 3mm o's that would be 69mm = 998cc and could be H**** pistons which were a common mod before high comp big bore kits were commonly available.
0.30 though is not a common metric oversize as they usually go up in 0.25 or 0.50mm increments.
0.30 would more likely signify 30 thou which is around 0.75mm equivalent.

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#4 PostAuthor: zed1015 » Fri May 11, 2012 5:12 pm

They do look similar to the unknown pistons in my Manzano engine though.


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malmojoe

#5 PostAuthor: malmojoe » Mon May 14, 2012 9:14 am

no, nothing inside the pistons Stu, but I'm thinking zed1015 could be right, this ebay listing states the pistons as H****, and although the profile is a little different they do look very similar.
Thanks for the info, very interesting.


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