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Gsr Block w/ 81.5 mm Bore. What size CTR pistons??

Old 11-10-2005, 01:32 PM
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Default Gsr Block w/ 81.5 mm Bore. What size CTR pistons??

I have a gsr block w/ 81.5 mm bore. i'm looking to get ctr pistons. Do i get the .25 oversized ctr pistons.
Old 11-10-2005, 01:54 PM
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Default Re: Gsr Block w/ 81.5 mm Bore. What size CTR pistons?? (kidd_drastic)

you want the 84 mm pistons, just heat up the block first and hammer them in there
Old 11-10-2005, 02:27 PM
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Default Re: Gsr Block w/ 81.5 mm Bore. What size CTR pistons?? (dohcMONSTER)

yes i did.
Old 11-10-2005, 02:53 PM
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Default Re: Gsr Block w/ 81.5 mm Bore. What size CTR pistons?? (kidd_drastic)

No. If your bore is actually 81.5mm you need 81.5 pistons not 81.25mm pistons. Take it to someone with a inside micrometer.
Old 11-10-2005, 03:26 PM
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Default Re: Gsr Block w/ 81.5 mm Bore. What size CTR pistons?? (dohcMONSTER)

https://honda-tech.com/zerothread?id=1415277

so this is the wrong information for the block i bought.
Old 11-10-2005, 03:47 PM
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Default Re: Gsr Block w/ 81.5 mm Bore. What size CTR pistons?? (kidd_drastic)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kidd_drastic &raquo;</TD></TR><TR><TD CLASS="quote">I have a gsr block w/ 81.5 mm bore. i'm looking to get ctr pistons. Do i get the .25 oversized ctr pistons.</TD></TR></TABLE>

the info is right:

.020" or .5mm is the piston size the block was bored for.

therefore, you need .020 or .5mm pistons...easy as that. Just call me if you have any questions.
Old 11-11-2005, 07:51 AM
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hmmmm.....81.5mm PCT's, 18C block......13+/1 c.r. g/l with your project.
Old 11-11-2005, 12:39 PM
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Default Re: Gsr Block w/ 81.5 mm Bore. What size CTR pistons?? (PURPLETERROR aka BIGMATT)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PURPLETERROR aka BIGMATT &raquo;</TD></TR><TR><TD CLASS="quote">you want the 84 mm pistons, just heat up the block first and hammer them in there</TD></TR></TABLE>

Ha ha. Made my day.
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